Lithium membrane separation mechanism

Abstract

The utility model relates to the technical field of lithium battery manufacturing, in particular to a lithium membrane separation mechanism. Comprising a first passing roller assembly, a second passing roller assembly, a first receiving roller and an adjusting assembly, the first passing roller assembly is used for conveying and rolling an original lithium strip, and the original lithium strip is provided with a release film; the second roller passing assembly is used for rolling the to-be-rolled lithium strip after the release film is separated; the first receiving roller is used for collecting the separated release film; the adjusting assembly comprises a driving mechanism and an adjusting roller, the adjusting roller is located at the separation position of the release film and the to-be-calendered lithium strip, and the driving mechanism drives the adjusting roller to move up and down so as to adjust the separation angle of the release film and the to-be-calendered lithium strip. The adjusting roller is arranged at the separation position of the release film and the lithium strip to be calendered, the driving mechanism can adjust the height of the adjusting roller in the vertical direction, and the separation angle of the lithium film is adjusted by changing the position of the adjusting roller. And a proper lithium membrane separation angle can be selected according to the model or application range of the original lithium strip.

Description

Technical Field

[0001] This application relates to the technical field of lithium battery manufacturing, and particularly relates to a lithium film separation mechanism. Background Art

[0002] In the application of lithium batteries, there are extremely high requirements for the thickness of the lithium strip. Usually, the thickness of the lithium strip needs to be reduced to dozens of micrometers, and the separation of the lithium strip from the release film is required.

[0003] In the existing lithium film separation equipment, due to the relatively soft texture of lithium, it is difficult to control the mechanical force, and color difference similar to oil spots is likely to form on the surface of the lithium strip. Selecting a suitable lithium film separation angle will affect the finished product of the lithium strip. Summary of the Utility Model

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, this application provides a lithium film separation mechanism.

[0005] A lithium film separation mechanism provided by this application includes: a first over-roller assembly, a second over-roller assembly, a first winding roller, and an adjustment assembly. The first over-roller assembly is used to convey and roll the original lithium strip, and the original lithium strip is provided with a release film; the second over-roller assembly is used to roll the lithium strip to be rolled after the release film is separated; the first winding roller is used to collect the separated release film; the adjustment assembly includes a driving mechanism and an adjustment roller. The adjustment roller is located at the separation position of the release film and the lithium strip to be rolled, and the driving mechanism drives the adjustment roller to move up and down to adjust the separation angle between the release film and the lithium strip to be rolled.

[0006] Optionally, the driving mechanism includes a rotating assembly, two threaded rods, and two symmetrically arranged side plates. The threaded rods are arranged on the opposite sides of the two side plates; connection ends are provided at both ends of the adjustment roller, and internal threads that are threadedly connected to the threaded rods are provided in the connection ends. The connection ends at both ends of the adjustment roller are sleeved on the threaded rods, and the rotating assembly drives the threaded rods to rotate.

[0007] Optionally, the rotating assembly includes a rotating rod, two first bevel gears are sleeved on the rotating rod, a second bevel gear is provided at the top end of the threaded rod, and the first bevel gear and the second bevel gear are meshed and connected.

[0008] Optionally, a handle for rotating the rotating rod is provided at one end of the rotating rod, and / or,

[0009] A driving device is provided at one end of the rotating rod for driving the rotating rod to rotate.

[0010] Optionally, the first over-roller assembly includes two first roller shafts and two first fixing brackets. The two first fixing brackets are arranged at both ends of the two first roller shafts and are used to connect the two first roller shafts.

[0011] Optionally, the two first roller shafts have the same size.

[0012] Optionally, the second over-roller assembly includes two second roller shafts and two second fixing brackets. The two second fixing brackets are arranged at both ends of the two second roller shafts and are used to connect the two second roller shafts.

[0013] Optionally, the two second roller shafts have the same size.

[0014] Optionally, it further includes a second winding roller, which is arranged downstream of the second over-roller assembly and is used to collect the rolled lithium strip.

[0015] Optionally, it further includes a third roller shaft, which is arranged between the first over-roller assembly and the adjusting assembly, and the third roller shaft is supported below the initial lithium strip.

[0016] In the lithium film separation mechanism of the present application, an adjusting roller is arranged at the separation position of the release film and the lithium strip to be rolled. The driving mechanism can adjust the height of the adjusting roller in the vertical direction, and adjust the separation angle of the lithium film by changing the position of the adjusting roller. The appropriate lithium film separation angle can be selected according to the model or applicable range of the original lithium strip. Then manually separate the lithium film of the original lithium strip, and pull the lithium strip to be rolled to the second over-roller assembly, and pull the release film to the first winding roller. The second over-roller assembly can further roll and plasticize the lithium strip to be rolled, and process the lithium strip to be rolled into an ultra-thin lithium strip product with a flat surface and no color difference. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings here are incorporated into the specification and form a part of this specification, showing the embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings.

[0019] Figure 1 It is a schematic structural diagram of the lithium film separation mechanism in the working state of the embodiment of the present application;

[0020] Figure 2 It is a front view of the lithium film separation mechanism in the working state of the embodiment of the present application;

[0021] Figure 3 Schematic structural diagram of the lithium film separation mechanism according to an embodiment of the present application;

[0022] Figure 4 Exploded view of the adjustment component according to an embodiment of the present application;

[0023] Figure 5 Schematic structural diagram of the adjustment roller according to an embodiment of the present application.

[0024] Reference numerals in the specific embodiments are as follows:

[0025] 1. First over-roller assembly; 11. First roller shaft; 12. First fixing bracket; 2. Second over-roller assembly; 21. Second roller shaft; 22. Second fixing bracket; 3. Original lithium strip; 4. Release film; 5. Lithium strip to be calendered; 6. First winding roller; 7. Adjustment component; 71. Driving mechanism; 711. Rotating component; 711a. Rotating rod; 711b. First bevel gear; 711c. Handle; 712. Threaded rod; 712a. Second bevel gear; 713. Side plate; 72. Adjustment roller; 721. Connection end; 721a. Internal thread; 8. Second winding roller; 9. Third roller shaft. Specific embodiments

[0026] In order to more clearly understand the above objects, features and advantages of the present application, the solution of the present application will be further described below. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0027] Many specific details are set forth in the following description in order to provide a thorough understanding of the present application, but the present application may be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the present application, rather than all embodiments.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0029] In the description of the embodiments of the present application, the meanings of "a plurality" and "several" are more than two (including two), unless otherwise specifically defined.

[0030] References herein to "embodiments" mean that the particular features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0031] According to some embodiments of the present application, with reference to Figure 1 and Figure 2 as shown, wherein, Figure 1 is a schematic structural view of the lithium film separation mechanism in operation according to an embodiment of the present application, Figure 2 is a front view of the lithium film separation mechanism in operation according to an embodiment of the present application. The lithium film separation mechanism according to an embodiment of the present application includes: a first over-roller assembly 1, a second over-roller assembly 2, a first winding roller 6, and an adjustment assembly 7. The first over-roller assembly 1 is used to convey and roll the original lithium strip 3, and the original lithium strip 3 is provided with a release film 4; the second over-roller assembly 2 is used to roll the lithium strip 5 to be calendered after separating the release film 4; the first winding roller 6 is used to collect the separated release film 4; the adjustment assembly 7 includes a driving mechanism 71 and an adjustment roller 72. The adjustment roller 72 is located at the separation position of the release film 4 and the lithium strip 5 to be calendered, and the driving mechanism 71 drives the adjustment roller 72 to move up and down to adjust the separation angle between the release film 4 and the lithium strip 5 to be calendered.

[0032] Specifically, the first over-roller assembly 1 and the second over-roller assembly 2 preferably have a roller diameter size of 10 cm - 16 cm, and the position of the second over-roller assembly 2 is lower than that of the first over-roller assembly 1. The surface material of the second over-roller assembly 2 is preferably silicone or acetal. The preferred roller diameter size of the adjustment roller 72 is 6 cm - 10 cm.

[0033] Since lithium is relatively soft and mechanical stress is difficult to control, using an inappropriate lithium film separation method will easily cause a color difference similar to oil spots on the surface of the lithium strip. Therefore, selecting an appropriate lithium film separation angle will improve the effect of lithium film separation. The adjustment assembly 7 includes a driving mechanism 71 and an adjustment roller 72. The adjustment roller 72 is arranged at the separation position of the release film 4 and the lithium strip 5 to be calendered, and the driving mechanism 71 can adjust the height of the adjustment roller 72 in the vertical direction, and adjust the separation angle of the lithium film by changing the position of the adjustment roller 72. An appropriate lithium film separation angle can be selected according to the model or applicable range of the original lithium strip 3, and the preferred adjusted separation angle of the lithium film is 20° - 50°. Then manually separate the lithium film of the original lithium strip 3, and pull the lithium strip 5 to be calendered to the second over-roller assembly 2, and pull the release film 4 to the first winding roller 6. The second over-roller assembly 2 can further roll and plastify the lithium strip 5 to be calendered to process the lithium strip 5 to be calendered into an ultra-thin lithium strip product with a flat surface and no color difference.

[0034] According to some embodiments of the present application, with reference to Figure 1 , Figure 4 and Figure 5 as shown, Figure 4 is an exploded view of the adjusting assembly according to an embodiment of the present application, Figure 5 is a schematic structural view of the adjusting roller according to an embodiment of the present application. The driving mechanism 71 includes a rotating assembly 711, two threaded rods 712, and two symmetrically arranged side plates 713. The threaded rods 712 are arranged on the opposite sides of the two side plates 713; both ends of the adjusting roller 72 are provided with connection ends 721, and internal threads 721a that are threadedly connected to the threaded rods 712 are provided in the connection ends 721. The connection ends 721 at both ends of the adjusting roller 72 are sleeved on the threaded rods 712, and the rotating assembly 711 drives the threaded rods 712 to rotate. The rotating assembly 711 includes a rotating rod 711a, and two first bevel gears 711b are sleeved on the rotating rod 711a. A second bevel gear 712a is provided at the top end of the threaded rod 712, and the first bevel gear 711b and the second bevel gear 712a are meshed and connected. One end of the rotating rod 711a is provided with a handle 711c for rotating the rotating rod 711a.

[0035] Two first bevel gears 711b are sleeved on the rotating rod 711a, and a second bevel gear 712a is provided at the top end of the threaded rod 712. By manually rotating the handle 711c, the two first bevel gears 711b can be driven to rotate; and because the first bevel gear 711b and the second bevel gear 712a are meshed and connected, the first bevel gear 711b drives the second bevel gear 712a to rotate, and then the threaded rod 712 also rotates accordingly. Both ends of the adjusting roller 72 are provided with connection ends 721, and internal threads 721a that are threadedly connected to the threaded rods 712 are provided in the connection ends 721. The connection ends 721 at both ends of the adjusting roller 72 are sleeved on the threaded rods 712, so when the threaded rod 712 rotates, the adjusting roller 72 can move in the extending direction of the threaded rod 712.

[0036] Of course, a driving device can also be provided at one end of the rotating rod 711a, and the driving device is used to provide a driving force to rotate the rotating rod 711a.

[0037] A driving device is provided at one end of the rotating rod 711a for driving the rotating rod 711a to rotate. According to some embodiments of the present application, with reference to Figures 1 to 3 , Figure 3 is a schematic structural view of the lithium film separation mechanism according to an embodiment of the present application. The first over-roller assembly 1 includes two first roller shafts 11 and two first fixing frames 12. The two first fixing frames 12 are arranged at both ends of the two first roller shafts 11 for connecting the two first roller shafts 11. The two first roller shafts 11 have the same size.

[0038] Specifically, two first roller shafts 11 are arranged in parallel and in contact with each other. The two ends of the two first roller shafts 11 are connected by two first fixing frames 12, and the first roller shafts 11 can rotate relative to the first fixing frames 12.

[0039] Pass the original lithium strip 3 through the gap between the two first roller shafts 11. The two first roller shafts 11 perform calendering on the original lithium strip 3 to change its shape, making the original lithium strip 3 tend to be thinner and the surface smoother. The two first roller shafts 11 have the same size, which is convenient for factory production and also convenient for subsequent replacement in case the first roller shafts 11 malfunction.

[0040] In some embodiments, referring to Figures 1 to 3 , the second passing roller assembly 2 includes two second roller shafts 21 and two second fixing frames 22. The two second fixing frames 22 are arranged at the two ends of the two second roller shafts 21 for connecting the two second roller shafts 21. The two second roller shafts 21 have the same size. It further includes a second winding roller 8, and the second winding roller 8 is arranged downstream of the second passing roller assembly 2 for collecting the calendered lithium strip.

[0041] Specifically, two second roller shafts 21 are arranged in parallel and in contact with each other. The two ends of the two second roller shafts 21 are connected by two second fixing frames 22, and the second roller shafts 21 can rotate relative to the second fixing frames 22.

[0042] Pass the lithium strip to be calendered 5 through the gap between the two second roller shafts 21. The two second roller shafts 21 perform calendering on the lithium strip to be calendered 5, further making the lithium strip to be calendered 5 tend to be thinner and the surface smoother. The two second roller shafts 21 have the same size, which is convenient for factory production and also convenient for subsequent replacement in case the second roller shafts 21 malfunction. Collect the calendered lithium strip through the second winding roller 8, which can be used for subsequent process manufacturing.

[0043] In some examples, referring to Figures 1 to 3 . The lithium film separating mechanism further includes a third roller shaft 9. The third roller shaft 9 is arranged between the first passing roller assembly 1 and the adjusting assembly 7, and the third roller shaft 9 is supported below the original lithium strip 3.

[0044] Since the original lithium strip 3 is thin and easy to deform, and has a relatively soft texture, it is difficult to control the mechanical force. If the distance between the first passing roller assembly 1 and the adjusting assembly 7 is too large, the original lithium strip 3 will fall downward due to its own weight, resulting in an uneven surface of the original lithium strip 3. Arranging the third roller shaft 9 between the first passing roller assembly 1 and the adjusting assembly 7 can provide further support for the too-long original lithium strip 3 to prevent the original lithium strip 3 from deforming.

[0045] The working principle of this lithium film separating mechanism will be introduced in detail below.

[0046] The adjusting assembly 7 includes a driving mechanism 71 and an adjusting roller 72. The adjusting roller 72 is arranged at the separation position of the release film 4 and the lithium strip 5 to be calendered. The driving mechanism 71 can adjust the height of the adjusting roller 72 in the vertical direction, and adjust the separation angle of the lithium film by changing the position of the adjusting roller 72. The appropriate separation angle of the lithium film can be selected according to the model or applicable range of the original lithium strip 3. Then, manually separate the lithium film of the original lithium strip 3, and pull the lithium strip 5 to be calendered to the second idler roller assembly 2, and pull the release film 4 to the first take-up roller 6. The second idler roller assembly 2 can further roll and plasticize the lithium strip 5 to be calendered, and process the lithium strip 5 to be calendered into an ultra-thin lithium strip product with a flat surface and no color difference. Among them, the driving mechanism 71 includes a rotating assembly 711, two threaded rods 712 and two symmetrically arranged side plates 713. Two first bevel gears 711b are sleeved on the rotating rod 711a, and a second bevel gear 712a is arranged at the top of the threaded rod 712. By manually rotating the handle 711c, the two first bevel gears 711b can be driven to rotate; and because the first bevel gear 711b and the second bevel gear 712a are meshed and connected, the first bevel gear 711b drives the second bevel gear 712a to rotate, and then the threaded rod 712 also rotates accordingly. Connecting ends 721 are arranged at both ends of the adjusting roller 72, and internal threads 721a that are threadedly connected to the threaded rods 712 are arranged inside the connecting ends 721. The connecting ends 721 at both ends of the adjusting roller 72 are sleeved on the threaded rods 712. Therefore, when the threaded rods 712 rotate, the adjusting roller 72 can move in the extending direction of the threaded rods 712.

[0047] The content of this application is not limited to the examples listed. Any equivalent transformation of the technical solution of this application adopted by those of ordinary skill in the art by reading the specification of this application is covered by the claims of this application.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them; although this application 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 described 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 this application, and they should all be covered within the scope of the claims and the specification of this application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. This application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A lithium membrane separation mechanism, characterized in that: include: A first roller assembly (1) is used for conveying and rolling an original lithium ribbon (3), wherein the original lithium ribbon (3) is provided with a release film (4); A second roller assembly (2) is used to roll the lithium strip (5) to be rolled after the release film (4) is separated; A first receiving roller (6), used for collecting the release film (4) after separation; The adjusting assembly (7) comprises a driving mechanism (71) and an adjusting roller (72), wherein the adjusting roller (72) is located at the separation point between the release film (4) and the lithium strip to be rolled (5), and the driving mechanism (71) drives the adjusting roller (72) to move up and down to adjust the separation angle between the release film (4) and the lithium strip to be rolled (5).

2. The lithium membrane separation mechanism according to claim 1, characterized in that: The driving mechanism (71) comprises a rotating assembly (711), two threaded rods (712) and two symmetrically arranged side plates (713), wherein the threaded rods (712) are arranged on opposite sides of the two side plates (713); connecting ends (721) are arranged at both ends of the adjusting roller (72), and internal threads (721a) are arranged in the connecting ends (721) for threaded connection with the threaded rods (712); the connecting ends (721) at both ends of the adjusting roller (72) are sleeved on the threaded rods (712), and the rotating assembly (711) drives the threaded rods (712) to rotate.

3. The lithium membrane separation mechanism according to claim 2, characterized in that: The rotating assembly (711) comprises a rotating rod (711a), two first bevel gears (711b) are sleeved on the rotating rod (711a), a second bevel gear (712a) is provided at the top end of the threaded rod (712), and the first bevel gear (711b) and the second bevel gear (712a) are meshingly connected.

4. The lithium membrane separation mechanism according to claim 3, characterized in that: One end of the rotating rod (711a) is provided with a handle (711c) for rotating the rotating rod (711a), and / or, A driving device is provided at one end of the rotating rod (711a) for driving the rotating rod (711a) to rotate.

5. The lithium membrane separation mechanism according to claim 1, characterized in that: The first roller assembly (1) comprises two first roller shafts (11) and two first fixing frames (12); the two first fixing frames (12) are arranged at both ends of the two first roller shafts (11) and are used to connect the two first roller shafts (11).

6. The lithium membrane separation mechanism according to claim 5, characterized in that: The two first rollers (11) have the same size.

7. The lithium membrane separation mechanism according to claim 1, characterized in that: The second roller assembly (2) comprises two second roller shafts (21) and two second fixing frames (22), wherein the two second fixing frames (22) are arranged at both ends of the two second roller shafts (21) and are used to connect the two second roller shafts (21).

8. The lithium membrane separation mechanism according to claim 7, characterized in that: The two second rollers (21) have the same size.

9. The lithium membrane separation mechanism according to claim 1, characterized in that: It also comprises a second receiving roller (8), which is arranged downstream of the second roller assembly (2) and is used to collect the rolled lithium strip.

10. The lithium membrane separation mechanism according to claim 1, characterized in that: It also includes a third roller (9), which is arranged between the first roller assembly (1) and the adjustment assembly (7), and the third roller (9) is supported below the original lithium belt (3).

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