Lithium supplementing and rolling device for lithium foil

Abstract

The utility model relates to a lithium-supplementing rolling device for a lithium foil, which is used for solving at least one of the problems that the existing equipment is more, the occupied area is large, the lithium foil is easy to break, a pole piece and a base material are difficult to strip, the lithium foil and the pole piece are not tightly compounded and the like. According to the lithium foil lithium supplement rolling device, single-face compounding or double-face compounding of a lithium supplement pole piece can be achieved, when single-face compounding is conducted, one lithium foil unwinding mechanism is selected, when double-face compounding is conducted, two lithium foil unwinding mechanisms are selected, interface contact between the lithium foil and the pole piece is further enhanced through the compaction mechanism, and therefore the lithium supplement effect is improved. The surface stripping force and the lithium supplementing effect are improved, and the lithium foil and the pole piece are compounded more tightly. And a PET film loaded lithium foil is not required to be wound and then transferred to a compounding mechanism in the traditional process. And the problem of subsequent stripping of the lithium foil and the PET carrier is solved. The lithium strip lithium supplementing device can greatly simplify lithium strip lithium supplementing working equipment, improve production efficiency, reduce consumable consumption and strip breakage loss, accurately control the thickness of lithium foil and improve the yield.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery manufacturing, in particular to a lithium foil lithium supplementing rolling device. Background Art

[0002] Lithium-ion batteries, due to their high energy density, have long dominated portable electronics and electric vehicles. To meet the growing demand for energy storage applications, there is an urgent need to further increase the energy density of lithium-ion batteries. For lithium-ion batteries with graphite-based anodes, side reactions on the anode surface during initial charging can lead to a loss of active lithium, significantly reducing the battery's capacity and energy density.

[0003] To address these issues and improve the energy density of lithium-ion batteries, pre-lithiation of the electrodes is typically performed by adding lithium. The lithium ribbon filling process, which involves rolling a lithium ribbon onto the electrode, has become one of the mainstream pre-lithiation solutions due to its ease of mass production, simplicity, and high safety.

[0004] However, in the prior art, lithium strip lithium replenishment has the following problems: 1) The existing equipment needs to first thin and roll the lithium foil in the lithium strip lithium replenishment process, and then roll it with the electrode to compound it. The required equipment is large and the floor space is large. 2) The tensile strength of the lithium foil itself is low, and the strip is prone to breakage during the rolling and conduction process. 3) A supporting substrate is required to achieve the winding, unwinding and transfer of the lithium foil. After compounding, the supporting substrate is difficult to peel off and the use of supporting materials leads to increased costs. 4) The cost of lithium foil is high, and the waste generated in the lithium replenishment process will lead to increased costs. 5) The lithium foil and the electrode are not tightly compounded, and the physical gap at the interface will reduce the lithium replenishment effect. Utility Model Content

[0005] In view of the above analysis, the present invention aims to provide a lithium foil lithium replenishing rolling device to solve at least one of the problems of the existing equipment being large in number, occupying a large area, the lithium foil being prone to breaking, the difficulty in peeling off the electrode and the substrate, and the lithium foil and the electrode being loosely combined.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A lithium foil lithium supplementation rolling device, comprising:

[0008] The electrode rewinding mechanism and the electrode unwinding mechanism are arranged at intervals, and the electrode rewinding mechanism and the electrode unwinding mechanism are used to rewind and unwind the lithium-supplementing electrode;

[0009] One or two lithium foil unwinding mechanisms located on the side of the lithium supplement electrode, the lithium foil unwinding mechanism being used to release the lithium foil;

[0010] PET unwinding mechanism and PET rewinding mechanism, the PET unwinding mechanism and PET rewinding mechanism are used to rewind PET film, and the PET unwinding mechanism and the PET rewinding mechanism are arranged in a one-to-one correspondence with the lithium foil unwinding mechanism;

[0011] A rolling and thinning device for thinning the lithium foil and a compounding device for compounding the lithium-supplementing electrode and the thinned lithium foil are arranged in parallel;

[0012] Two compacting mechanisms, the two compacting mechanisms are respectively located on both sides of the lithium replenishing electrode between the composite device and the electrode winding mechanism.

[0013] Furthermore, the calendering and thinning device includes at least two roller pressing mechanisms arranged in parallel, the composite device includes two roller pressing mechanisms arranged in parallel, and the calendering and thinning device and the composite device have one or two common roller pressing mechanisms.

[0014] Furthermore, the composite device further comprises a supporting roller pressing mechanism, wherein the supporting roller pressing mechanism is arranged in parallel with the composite device. Furthermore, the diameter of the compacting mechanism is larger than the diameter of the roller pressing mechanism.

[0015] Furthermore, the diameters of the roller pressing mechanisms are the same.

[0016] Furthermore, the common rolling mechanism is also connected to a cutting and recycling mechanism, which includes a cutter and a waste recycling mechanism.

[0017] Furthermore, the compacting structure is also connected to a release agent spraying mechanism.

[0018] Furthermore, the lithium foil unwinding mechanism, the PET unwinding mechanism, the PET winding mechanism, the electrode winding mechanism and the electrode unwinding mechanism are respectively connected to a deviation correction and tension control mechanism.

[0019] Furthermore, the surface of the compacting mechanism is a anilox roller or a mirror roller.

[0020] Furthermore, when there are two lithium foil unwinding mechanisms, the lithium foil replenishing roller pressing devices are symmetrically arranged with the lithium replenishing electrode sheets being symmetrical.

[0021] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0022] (1) The lithium foil refilling roller pressing device of the present invention can realize single-sided or double-sided refilling of the lithium refilling electrode. When single-sided refilling is performed, one lithium foil unwinding mechanism is selected. When double-sided refilling is performed, two lithium foil unwinding mechanisms are selected. The interface contact between the lithium foil and the electrode is further enhanced by the compacting mechanism, thereby improving the surface peeling force and lithium refilling effect, and making the lithium foil and the electrode more tightly refilled. There is no need to use PET film to load the lithium foil and then transfer it to the refilling mechanism in the traditional process. The subsequent peeling problem of the lithium foil and the PET carrier is solved. The device of the present invention can greatly simplify the lithium strip refilling equipment, improve production efficiency, reduce consumables consumption and belt breakage loss, and accurately control the thickness of the lithium foil to improve the yield rate;

[0023] (2) The number of roller pressing structures in the thinning device of the present invention is adjusted according to the thickness of the lithium foil to be thinned. By increasing the number of roller pressing mechanisms in the thinning device, the number of lithium foil thinning times is increased, thereby improving the thinning capacity and precision. The number of roller pressing mechanisms can be reduced to streamline the equipment cost and floor space. The two adjacent roller pressing mechanisms transfer the thinned lithium foil through the speed difference. The more the lithium foil passes through the roller pressing mechanisms, the thinner the lithium foil.

[0024] (3) The utility model uses a cutter in a cutting and recycling mechanism to cut off the excess part so that the lithium foil and the lithium-supplemented electrode are aligned, and then composited. A waste recycling mechanism is set next to the cutter to collect the waste generated by cutting for lithium foil molding, thereby improving the utilization rate of lithium metal;

[0025] (4) The diameter of the compacting mechanism described in the present invention is larger than the diameter of the rolling mechanism described. The compacting mechanism with a large diameter uniformly presses the lithium-replenishing electrode, thereby enhancing the interface contact between the lithium foil and the electrode, and improving the surface peeling force and the lithium-replenishing effect.

[0026] (5) The surface of the compacting mechanism described in the present invention is an anilox roller, which ensures that the lithium foil is transferred between the roller surfaces by virtue of the greater adhesion of the anilox roller surface to the lithium foil. The protrusions on the surface of the anilox roller increase the surface pressure between the lithium foil and the electrode during the composite process, thereby significantly improving the composite strength between the lithium foil and the electrode, and preventing the lithium foil from sticking to the roller and affecting the composite effect. The compacting mechanism and the release agent spraying mechanism can improve the interface contact and prevent the lithium foil from falling off.

[0027] In the present invention, the above-mentioned technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of the present invention will be described in the following content, and some advantages will become apparent from the description or be understood through practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the text and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are only used for the purpose of illustrating specific embodiments and are not to be considered as limiting the present invention. Throughout the accompanying drawings, the same reference symbols denote the same components.

[0029] Figure 1 This is a schematic diagram of a single-side lithium replenishment structure of a lithium foil lithium replenishment roller pressing device in the present invention;

[0030] Figure 2 This is a schematic diagram of the double-sided lithium replenishment structure of another lithium foil lithium replenishment roller pressing device in the present invention;

[0031] Figure 3 This is a schematic diagram of the double-sided lithium replenishment structure of a lithium foil lithium replenishment roller pressing device in the utility model.

[0032] Reference numerals:

[0033] 110-first rolling mechanism, 120-second rolling mechanism, 130-third rolling mechanism, 140-fourth rolling mechanism, 150-fifth rolling mechanism, 160-sixth rolling mechanism, 170-seventh rolling mechanism, 180-eighth rolling mechanism, 190-ninth rolling mechanism, 111-tenth rolling mechanism, 210-first PET unwinding mechanism, 220-second PET unwinding mechanism, 310-first PET winding mechanism, 320-second PET winding mechanism, 410-first lithium foil unwinding mechanism, 420-second lithium foil unwinding mechanism, 500-electrode unwinding mechanism, 600-electrode winding mechanism, 700-compacting mechanism, 001-correcting and tension control mechanism, 002-cutting and recycling mechanism, 003-release agent spraying mechanism, 004-lithium foil, 005-lithium replenishing electrode, 006-PET film. DETAILED DESCRIPTION

[0034] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, and are not used to limit the scope of the present invention.

[0035] A specific embodiment of the present invention is as follows Figure 1-3 As shown, a lithium foil lithium supplementation rolling device is disclosed, comprising:

[0036] The electrode rewinding mechanism 600 and the electrode unwinding mechanism 500 are arranged at intervals, and the electrode rewinding mechanism 600 and the electrode unwinding mechanism 500 are used to rewind and unwind the lithium replenishing electrode 005;

[0037] One or two lithium foil unwinding mechanisms located on the side of the lithium supplement electrode 005, the lithium foil unwinding mechanism is used to release the lithium foil 004;

[0038] PET unwinding mechanism and PET rewinding mechanism, the PET unwinding mechanism and PET rewinding mechanism are used to rewind the PET film 006, and the PET unwinding mechanism and the PET rewinding mechanism are arranged in a one-to-one correspondence with the lithium foil unwinding mechanism;

[0039] A rolling and thinning device for thinning the lithium foil 004 and a compounding device for compounding the lithium-replenishing electrode 005 with the thinned lithium foil are arranged in parallel;

[0040] Two compacting mechanisms 700 are respectively located on both sides of the lithium replenishing electrode 005 between the composite device and the electrode winding mechanism 600.

[0041] The lithium foil refilling roller pressing device of the present invention can realize single-sided or double-sided refilling of the lithium refilling electrode 005. When single-sided refilling is performed, one lithium foil unwinding mechanism is selected, and when double-sided refilling is performed, two lithium foil unwinding mechanisms are selected. The interface contact between the lithium foil and the electrode is further enhanced by the compacting mechanism, thereby improving the surface peeling force and the lithium refilling effect, and making the lithium foil and the electrode more tightly refilled. There is no need to use PET film 006 to load the lithium foil and then transfer it to the refilling mechanism as in the traditional process. Since the PET film 006 needs to be recycled, the use of a cutter to trim the edges in the traditional process will cause the PET film 006 to be damaged and cannot be reused, thereby increasing production costs. This solves the problem of subsequent peeling of the lithium foil 004 from the PET carrier. The device of the present invention can greatly simplify the lithium strip refilling equipment, improve production efficiency, reduce consumables consumption and belt breakage loss, and accurately control the thickness of the lithium foil 004 to improve the yield rate.

[0042] In a specific embodiment, the calendering and thinning device includes at least two roller pressing mechanisms arranged in parallel, the composite device includes two roller pressing mechanisms arranged in parallel, and the calendering and thinning device and the composite device have one or two common roller pressing mechanisms.

[0043] The number of rollers in the thinning device of this practical device is adjusted based on the desired thickness of the lithium foil 004. Increasing the number of rollers increases the number of times the lithium foil 004 can be thinned, improving thinning capacity and precision. Reducing the number of rollers reduces equipment costs and floor space. Adjacent rollers transfer the thinned lithium foil through a speed difference. The more rollers the foil passes through, the thinner it becomes.

[0044] In a specific embodiment, the composite device further includes a supporting roller pressing mechanism, and the supporting roller pressing mechanism is arranged in parallel with the composite device.

[0045] In a specific embodiment, the common rolling mechanism is further connected to a cutting and recycling mechanism 002, which includes a cutter and a waste recycling mechanism.

[0046] It should be noted that the lithium foil 004 will stretch during the thinning process, causing the width to change and unable to be aligned with the width of the lithium-replenishing electrode 005, and the initial width of the lithium foil 004 is larger than the final required width. After thinning, the excess part is cut by the cutter in the cutting and recycling mechanism 002 to align the lithium foil 004 with the lithium-replenishing electrode 005, and then compounded. A waste recycling mechanism is set next to the cutter to collect the waste generated by cutting for the molding of the lithium foil 004, thereby improving the utilization rate of lithium metal.

[0047] In a specific embodiment, the compacting structure is further connected to a release agent spraying mechanism 003 .

[0048] It should be noted that after the electrode is replenished with lithium, it is transmitted to the compacting mechanism 700, and the release agent spraying mechanism 003 continues to replenish the release agent on the compacting mechanism 700 to prevent the lithium foil 004 from sticking under high pressure.

[0049] In a specific embodiment, the diameter of the compacting mechanism 700 is larger than the diameter of the rolling mechanism.

[0050] In a specific embodiment, the diameters of the roller pressing mechanisms are the same.

[0051] The large-diameter compacting mechanism 700 applies uniform pressure to the lithium replenishing electrode 005, thereby enhancing the interface contact between the lithium foil 004 and the electrode, and improving the surface peeling force and lithium replenishing effect.

[0052] In a specific embodiment, the lithium foil unwinding mechanism, the PET unwinding mechanism, the PET winding mechanism, the electrode winding mechanism 600 and the electrode unwinding mechanism 500 are respectively connected to the deviation correction and tension control mechanism 001.

[0053] It should be noted that the surface of the PET film 006 of the utility model is coated with silicone oil or other demolding machines, and the PET film 006 and the lithium foil 004 are respectively unwound through the PET winding mechanism, the lithium foil winding mechanism, and the correction and tension control mechanism 001, and placed between two rolling mechanisms. The PET film 006 is used to prevent the lithium foil 004 from adhering to the surface of the rolling mechanism during calendering, ensuring that the lithium foil 004 is transferred through the roller surface of the subsequent rolling mechanism after calendering.

[0054] In a specific embodiment, the surface of the compacting mechanism 700 is a screen roller or a mirror roller.

[0055] The anilox roller or mirror roller can be replaced as needed to replenish lithium. The strong adhesion of the anilox roller surface to the lithium foil ensures the transfer of the lithium foil between the roller surfaces. The protrusions on the anilox roller surface increase the surface pressure between the lithium foil and the electrode during lamination, significantly improving the composite strength of the lithium foil and the electrode, and preventing the lithium foil from sticking to the roller and affecting the composite effect.

[0056] Specifically, during the implementation process, lubricant is added to the surface of the roller pressing mechanism in the compacting mechanism 700 to prevent the lithium foil 004 from sticking to the roller.

[0057] In a specific embodiment, when there are two lithium foil unwinding mechanisms, the lithium foil replenishing electrode 005 is symmetrical, and the lithium foil replenishing rolling device is symmetrically arranged.

[0058] The technical solution of the present invention is further explained below in conjunction with specific embodiments.

[0059] Example 1

[0060] like Figure 1 As shown, a lithium foil lithium replenishment rolling device of this embodiment is used to replenish lithium on a single side of an electrode. The device of this embodiment includes a lithium foil unwinding mechanism, namely the first lithium foil unwinding mechanism 410, a PET unwinding mechanism and a PET rewinding mechanism, namely the first PET unwinding mechanism 210 and the first PET rewinding mechanism 310. The rolling and thinning device and the composite device comprise a total of six rolling mechanisms, respectively designated as the first rolling mechanism 110, the second rolling mechanism 120, the third rolling mechanism 130, the fourth rolling mechanism 140, the fifth rolling mechanism 150, and the sixth rolling mechanism 160. The fourth rolling mechanism 140 is a rolling mechanism shared by the rolling and thinning device and the composite device. The lithium replenishment electrode 005 is composited with the lithium foil 004 in the fourth and fifth rolling mechanisms 140 and 150. The sixth rolling mechanism 160 serves as a supporting rolling mechanism and rotates at the same speed as the fifth rolling mechanism 150.

[0061] In this embodiment, the first rolling mechanism 110 , the second rolling mechanism 120 , the third rolling mechanism 130 , the fourth rolling mechanism 140 , the fifth rolling mechanism 150 and the sixth rolling mechanism 160 are arranged side by side from left to right, and the diameters of the rolling mechanisms are the same.

[0062] The lithium foil 004 is transferred to the space between the first rolling mechanism 110 and the second rolling mechanism 120 through the first lithium foil unwinding mechanism 410, and the PET film 006 is transferred to the space between the first rolling mechanism 110 and the second rolling mechanism 120 through the first PET unwinding mechanism 210. At the same time, the first PET winding mechanism 310 winds up the PET film 006. Silicone oil is coated on the surface of the PET film 006 to prevent the lithium foil 004 from adhering to the PET film 006 or the surface of the first rolling mechanism 110.

[0063] In addition, the rolling and thinning device includes a first rolling mechanism 110 , a second rolling mechanism 120 , a third rolling mechanism 130 , and a fourth rolling mechanism 140 , and the composite device includes a fourth rolling mechanism 140 and a fifth rolling mechanism 150 .

[0064] The first rolling mechanism 110 and the second rolling mechanism 120 perform differential rolling, the lithium foil 004 is thinned, and the surface of the third rolling mechanism 130 is transferred to the gap between the third and fourth rolling mechanisms 140. The thinning capability of the equipment is improved through multiple thinning, the thickness of the lithium foil 004 is accurately controlled, the amount of lithium replenishment is accurately controlled, and the risk of lithium foil 004 breaking caused by excessive thinning in a single time is reduced, thereby maximizing the capacity of the battery cell while ensuring its safety and production continuity.

[0065] Specifically, the electrode rewinding mechanism 600 and the electrode unwinding mechanism 500 are used to rewind and unwind the lithium-replenishing electrode 005. The lithium-replenishing electrode 005 is located between the fourth rolling mechanism 140 and the fifth rolling mechanism 150. A compacting mechanism 700 is disposed on both sides of the lithium-replenishing electrode 005 between the fourth rolling mechanism 140 or the fifth rolling mechanism 150 and the electrode rewinding mechanism 600. The diameter of the compacting mechanism 700 is larger than the diameters of the first rolling mechanism 110, the second rolling mechanism 120, the third rolling mechanism 130, the fourth rolling mechanism 140, the fifth rolling mechanism 150, and the sixth rolling mechanism 160. The compacting mechanism 700 is also connected to the release agent spraying mechanism 003. The fourth rolling mechanism 140 is also connected to the cutting and recycling mechanism 002, which includes a cutter and a waste recovery mechanism. The compacting mechanism 700 can be replaced with an anilox roller or a mirror roller according to the lithium replenishment needs.

[0066] The lithium foil unwinding mechanism, the first PET unwinding mechanism 210, the first PET winding mechanism 310, the electrode winding mechanism 600 and the electrode unwinding mechanism 500 are respectively connected to the deviation correction and tension control mechanism 001.

[0067] Example 2

[0068] The lithium foil lithium supplementation roller pressing device of this embodiment is different from that of embodiment 1 in that: Figure 2 As shown, the electrode is double-sidedly lithium-replenished, and the two lithium foil unwinding mechanisms are respectively the first lithium foil unwinding mechanism 410 and the second lithium foil unwinding mechanism 420, and the two PET unwinding mechanisms and the two PET winding mechanisms are respectively the first PET unwinding mechanism 210, the second PET unwinding mechanism 220, the first PET winding mechanism 310 and the second PET winding mechanism 320.

[0069] The third and fourth rolling mechanisms 130 and 140 are common rolling mechanisms for the rolling and thinning device and the composite device. The rolling and thinning device includes the first rolling mechanism 110, the second rolling mechanism 120, and the third rolling mechanism 130, while the composite device includes the third and fourth rolling mechanisms 130 and 140. The third and fourth rolling mechanisms 130 and 140 are each connected to a cutting and recycling mechanism 002. The lithium foil replenishment rolling device of this embodiment is symmetrically arranged with respect to the lithium replenishment electrode 005.

[0070] Example 3

[0071] The lithium foil lithium supplementation roller pressing device of this embodiment is different from that of embodiment 2 in that: Figure 3 As shown, a total of 10 rolling mechanisms are arranged in parallel in the calendering and thinning device and the compounding device, namely the first rolling mechanism 110, the second rolling mechanism 120, the third rolling mechanism 130, the fourth rolling mechanism 140, the fifth rolling mechanism 150, the sixth rolling mechanism 160, the seventh rolling mechanism 170, the eighth rolling mechanism 180, the ninth rolling mechanism 190, and the tenth rolling mechanism 111. The fifth rolling mechanism 150 and the sixth rolling mechanism 160 are rolling mechanisms shared by the calendering and thinning device and the compounding device. The lithium-replenishing electrode sheet 005 is compounded in the fifth rolling mechanism 150 and the sixth rolling structure. The lithium-replenishing rolling device of the lithium foil is symmetrical with the lithium-replenishing electrode sheet 005.

[0072] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any changes or replacements that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in the present invention should be covered by the protection scope of the present invention.

Claims

1. A lithium foil lithium supplementation rolling device, characterized in that: include: The electrode rewinding mechanism and the electrode unwinding mechanism are arranged at intervals, and the electrode rewinding mechanism and the electrode unwinding mechanism are used to rewind and unwind the lithium-supplementing electrode; One or two lithium foil unwinding mechanisms located on the side of the lithium supplement electrode, the lithium foil unwinding mechanism being used to release the lithium foil; PET unwinding mechanism and PET rewinding mechanism, the PET unwinding mechanism and PET rewinding mechanism are used to rewind PET film, and the PET unwinding mechanism and the PET rewinding mechanism are arranged in a one-to-one correspondence with the lithium foil unwinding mechanism; A rolling and thinning device for thinning the lithium foil and a compounding device for compounding the lithium-supplementing electrode and the thinned lithium foil are arranged in parallel; Two compacting mechanisms, the two compacting mechanisms are respectively located on both sides of the lithium replenishing electrode between the composite device and the electrode winding mechanism.

2. The lithium foil lithium supplementation rolling device according to claim 1, characterized in that: The calendering and thinning device includes at least two roller pressing mechanisms arranged in parallel, the composite device includes two roller pressing mechanisms arranged in parallel, and the calendering and thinning device and the composite device have one or two common roller pressing mechanisms.

3. The lithium foil lithium supplementation rolling device according to claim 2, characterized in that: The composite device further comprises a supporting roller pressing mechanism, and the supporting roller pressing mechanism is arranged in parallel with the composite device.

4. The lithium foil lithium supplementation rolling device according to claim 2, characterized in that: The diameter of the compacting mechanism is larger than the diameter of the rolling mechanism.

5. The lithium foil lithium supplementation rolling device according to claim 2, characterized in that: The diameters of the various roller pressing mechanisms are the same.

6. The lithium foil lithium supplementation rolling device according to any one of claims 1 to 5, characterized in that: The common rolling mechanism is also connected to a cutting and recycling mechanism, which includes a cutter and a waste recycling mechanism.

7. The lithium foil lithium supplementation rolling device according to any one of claims 1 to 5, characterized in that: The compacting structure is also connected to a release agent spraying mechanism.

8. The lithium foil lithium supplementation roller pressing device according to claim 1, characterized in that: The lithium foil unwinding mechanism, the PET unwinding mechanism, the PET winding mechanism, the electrode winding mechanism and the electrode unwinding mechanism are respectively connected with a deviation correction and tension control mechanism.

9. The lithium foil lithium supplementation rolling device according to claim 1, characterized in that: The compacting mechanism is an anilox roller or a mirror roller.

10. The lithium foil lithium supplementation rolling device according to claim 1, characterized in that: When there are two lithium foil unwinding mechanisms, the lithium foil replenishing electrode pieces are symmetrical, and the lithium foil replenishing rolling devices are symmetrically arranged.

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