CN115763683A - Solid-state battery lithium metal negative electrode sheet manufacturing device and method - Google Patents
Solid-state battery lithium metal negative electrode sheet manufacturing device and method Download PDFInfo
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- CN115763683A CN115763683A CN202211272377.3A CN202211272377A CN115763683A CN 115763683 A CN115763683 A CN 115763683A CN 202211272377 A CN202211272377 A CN 202211272377A CN 115763683 A CN115763683 A CN 115763683A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses a solid-state battery lithium metal negative electrode sheet-making device and a method, wherein the solid-state battery lithium metal negative electrode sheet-making device comprises a lithium metal unreeling mechanism, a mylar film reeling mechanism, a tab pressing mechanism, a tab dotting mechanism, a circular drum mechanism, a cutting device and a plurality of rollers; the lithium metal sheet making method comprises the processes of lithium metal unreeling, mylar reeling, tab pressing, tab dotting, rotary material pulling, laser sheet making and vacuum belt conveying; the pole pieces are pressed, and the point punching of the pole pieces does not need the intermittent movement of lithium metal, so that the continuous movement can be realized to ensure the efficiency; the rotary pulling material ensures that enough contact area exists between the pole piece and the rotary suction plate, ensures that the acting force of unit area on the lithium metal is small enough, and reduces the damage to the lithium metal; the rotary drawing can ensure continuous operation and the efficiency of pole piece production; the laser film-making can solve the cutter problem of gluing of cutter film-making, and cutting effect is good.
Description
Technical Field
The invention relates to the technical field of lithium battery processing equipment, in particular to a device and a method for manufacturing a lithium metal negative electrode of a solid-state battery.
Background
A solid-state battery cell generally consists of a positive plate, a negative plate and a solid-state electrolyte. The metal lithium cathode coming material is coiled and wound on a reel, the surface of the metal lithium cathode coming material is silvery white gloss, flat, free of oil stain, scratch, wrinkle and dent, and is protected by mylar, and mylar needs to be separately collected during cutting. The flaking process of lithium metal is greatly different from the conventional graphite negative electrode because of metallic lithium (Li), silvery white soft metal, and the lightest metal existing in nature.
At present, the conventional lithium metal sheet making process usually adopts the processes of pole roll feeding → automatic unwinding → mylar film winding → lithium metal drawing → cutting of a cutting die → pole ear pressing → pole ear dotting → green glue pasting, but the processes have many disadvantages, for example, the lithium metal drawing adopts a clamping plate form to easily cause lithium metal damage, the cutting of the cutting die also easily causes the lithium metal to stick a knife to influence the cutting effect and the service life of a knife tool, the efficiency of the process flow is extremely low, the sheet making efficiency is only below 10PPM, and the efficiency requirement of mass production is difficult to meet.
The patent CN202021566624 "automatic sheet making machine for metal lithium negative electrode" proposes a full-automatic sheet making method, and the surface of the lithium metal sheet is easily damaged, resulting in low efficiency. Patent application No. 2021229184032 "a pole piece die cutting equipment" proposes that two rotating rollers extrude a pole piece to generate friction force to drive the pole piece to move forward, which can only be applied to a conventional graphite cathode, and the lithium metal cathode is not suitable for use due to its soft texture.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a device and a method for manufacturing a lithium metal negative electrode of a solid-state battery, so as to solve the problems that lithium metal is easy to damage in the material pulling process of the lithium metal, the lithium metal is easy to stick to a cutter due to the cutting of a cutting die, the efficiency of the process flow is extremely low, and the requirement of mass production efficiency is difficult to meet.
Therefore, the invention provides a method for preparing a lithium metal negative electrode of a solid-state battery, which comprises the following steps:
s1, automatically unreeling a lithium metal material roll through a lithium metal unreeling mechanism, reeling a mylar film led out through a mylar film reeling mechanism, and separating a lithium metal material belt;
s2, pressing a copper foil lug on the surface of the lithium metal material belt through a lug pressing mechanism; dotting the copper foil tab through a tab dotting mechanism;
s3, adsorbing the lithium metal material belt through a circular drum mechanism provided with a plurality of circular arc vacuum adsorption plates, wherein the circular drum mechanism rotates and drives the lithium metal material belt to move at a constant speed;
and S4, adsorbing the lithium metal material strip on the circular drum mechanism through a cutting device, and cutting to form mutually independent lithium metal pole pieces.
Further, the lug pressing mechanism and the lug dotting mechanism move along the movement direction of the lithium metal material belt respectively, and the pressing procedure and the dotting procedure are completed respectively.
Furthermore, the cutting device is a picosecond laser, and the picosecond laser is aligned to the gap between the circular arc-shaped vacuum suction plates to cut the lithium metal material belt.
Further, the cut lithium metal pole pieces are blown to the vacuum belt by the arc-shaped vacuum suction plate at the lowest position of the circular drum mechanism.
The invention also provides a device for producing a lithium metal cathode of the solid-state battery, which comprises a lithium metal unreeling mechanism, a mylar film reeling mechanism, a tab pressing mechanism, a tab dotting mechanism, a circular drum mechanism, a cutting device and a plurality of rollers; the lithium metal unreeling mechanism is used for installing a lithium metal coil; the mylar film winding mechanism is arranged on one side of the lithium metal unwinding mechanism and used for leading out and winding a mylar film in the lithium metal coil and separating a lithium metal material belt; the tab pressing mechanism is used for pressing a copper foil tab on the surface of the lithium metal material belt; and the tab dotting mechanism is used for dotting on the copper foil tab.
The circular drum mechanism is provided with a plurality of arc-shaped vacuum suction plates for sucking the lithium metal material belt, and a servo rotating motor for drawing the lithium metal material belt to move at a constant speed; the cutting device is arranged on one side of the circular rotary drum mechanism, a cutter head of the cutting device is aligned to a gap between every two adjacent arc-shaped vacuum suction plates, and the cutting device is used for cutting the lithium metal material belt into independent lithium metal pole pieces.
Furthermore, the circular drum mechanism is provided with a plurality of circular arc vacuum suction plates which are distributed in an annular array; a large number of vacuum adsorption holes are distributed on the surface of the arc-shaped vacuum suction plate.
Further, a vacuum belt is arranged below the circular drum mechanism and used for receiving the cut lithium metal pole pieces.
Furthermore, the lug pressing mechanism is arranged on a first servo shifting mechanism which drives the lug pressing mechanism to move left and right.
Furthermore, the lug dotting mechanism is arranged on a servo displacement mechanism II which drives the lug dotting mechanism to move left and right.
Further, the cutting device is a picosecond laser or a cutting hob cutter.
The device and the method for manufacturing the lithium metal negative electrode of the solid-state battery have the following advantages that:
1) The invention provides a lithium metal sheet-making method, which comprises the processes of unreeling lithium metal, reeling mylar, pole lug pressing, pole lug dotting, rotary material pulling, laser sheet-making and vacuum belt conveying; 2) According to the invention, pole pieces are pressed, and point of the pole pieces does not need intermittent movement of lithium metal, so that continuous movement can be realized, and the efficiency is ensured; 3) The rotary pulling material ensures that a sufficient contact area exists between the pole piece and the rotary suction plate, ensures that the acting force of unit area on lithium metal is small enough, and reduces the damage to the lithium metal; 4) The rotary drawing material can ensure continuous operation and ensure the efficiency of pole piece production; 5) The laser flaking method can solve the problem of cutter sticking caused by flaking with the cutter, and has good cutting effect.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiment(s) of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a solid-state battery lithium metal negative electrode manufacturing device according to the present invention;
FIG. 2 is a schematic structural diagram of a circular drum mechanism in a solid-state battery lithium metal negative electrode sheet-making apparatus according to the present invention;
FIG. 3 is a structural diagram of a circular arc vacuum suction plate in the lithium metal negative electrode sheet-making device of the solid-state battery according to the present invention;
description of the reference numerals
1. A lithium metal unwinding mechanism; 2. a mylar film winding mechanism; 3. a lithium metal material tape; 4. mylar film; 5. rolling; 6. a tab pressing mechanism; 7. a tab dotting mechanism; 8. a circular drum mechanism; 9. a picosecond laser; 10. a vacuum belt; 81. a circular arc vacuum suction plate; 82. a gap; 811. and (5) vacuum adsorption holes.
Detailed Description
It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1, the solid-state battery lithium metal negative electrode sheet manufacturing apparatus of the present invention includes: the device comprises a lithium metal unreeling mechanism 1, a mylar film reeling mechanism 2, a lug pressing mechanism 6, a lug dotting mechanism 7, a circular drum mechanism 8, a picosecond laser 9, a vacuum belt 10 and a plurality of rollers 5.
Specifically, the lithium metal material roll is arranged on a lithium metal unwinding mechanism 1, the lithium metal unwinding mechanism 1 is provided with a servo motor, and the lithium metal material roll is automatically unwound through the lithium metal unwinding mechanism 1; the lithium metal material roll comprises a lithium metal material belt 3 and a mylar film 4 for preventing lithium metals from being adhered to each other, a mylar film winding mechanism 2 is arranged on one side of the lithium metal unwinding mechanism 1 and is used for winding the mylar film 4 led out from the lithium metal unwinding mechanism 1, and the lithium metal material belt 3 drawn out from the lithium metal unwinding mechanism 1 enters the next process through a roller 5.
As shown in fig. 2 and 3, the lithium metal strip 3 is drawn by the circular drum mechanism 8, and the circular drum mechanism 8 includes two or more arc vacuum suction plates, a gap 82 is left between the arc vacuum suction plates 81, and the arc surface of the circular drum mechanism 8 can generate vacuum suction force; circular rotary drum mechanism 8 can be rotary motion under servo motor's drive, and the lithium metal material area is inhaled and is rotated along with circular rotary drum mechanism at the circular arc surface of circular rotary drum mechanism together, drives the lithium metal material area and moves with the constant velocity, and the picosecond laser is decided lithium metal in clearance department between the circular vacuum suction plate, and the rotary drum will be cut out when moving the extreme low position on the vacuum belt line is blown to the lithium metal pole piece.
The circular drum mechanism is composed of 12 circular arc vacuum suction plates, a large number of vacuum adsorption holes 811 are distributed on the surfaces of the suction plates, and positive blowing or vacuum suction can be formed on the surfaces of the circular arc vacuum suction plates through positive pressure or negative pressure air towards the small holes.
The lithium metal material belt 3 is unreeled and is peeled off behind the mylar membrane and get into next process through a plurality of roller 5, when the lithium metal material belt 3 moves the pressfitting station at utmost point ear pressing mechanism 6 place, utmost point ear pressing mechanism 6 can be with copper foil utmost point ear pressfitting on lithium metal material belt 3 surface, wherein, utmost point ear pressing mechanism 6 installs and drives on its servo shift mechanism one that removes about, utmost point ear pressing mechanism 6 can move along the 3 direction of motion in lithium metal material belt, make the pole piece pressfitting process need not lithium metal and do intermittent type nature motion, can continuous motion assurance efficiency.
After the copper foil tabs are pressed by the tab pressing mechanism 6, a pole piece dotting procedure is carried out on the tabs by the tab dotting mechanism 7, and the tab dotting mechanism 7 performs dotting marking on the copper foil tabs pressed on the lithium metal material belt 3; the tab dotting mechanism 7 is also arranged on a servo shifting mechanism II which drives the tab dotting mechanism to move left and right, and the tab dotting mechanism 7 can move along the movement direction of the lithium metal material belt 3, so that the intermittent movement of the lithium metal material belt is not needed in the pole piece dotting process, and the efficiency can be ensured by continuous movement.
In addition, a picosecond laser 9 is arranged on one side of the circular drum mechanism 8, the cutter head of the picosecond laser is aligned with the gap 82 between the arc-shaped vacuum suction plates, lithium metal is cut by the picosecond laser 9, and the cut pole piece can be blown onto a vacuum belt line when the circular drum mechanism is at the lowest position.
Based on above-mentioned solid-state battery lithium metal negative pole film-making device, the application has proposed the method of solid-state battery lithium metal negative pole film-making, specifically includes the following step:
s1, the lithium metal unreeling mechanism 1 automatically unreels the lithium metal coil, and meanwhile, the mylar film reeling mechanism 2 reels a mylar film 4 led out of the lithium metal coil and separates a lithium metal material belt 3;
s2, the lithium metal material belt 3 enters a pressing station through the roller 5, the lug pressing mechanism 6 moves along the movement direction of the lithium metal material belt 3, and a copper foil lug is pressed on the surface of the lithium metal material belt 3;
s3, the lithium metal material belt 3 enters a dotting station through the roller 5, the tab dotting mechanism 7 also moves along the movement direction of the lithium metal material belt 3, and the copper foil tabs are dotted;
s4, the lithium metal material belt 3 is drawn to the position of the circular drum mechanism 8 through the roller 5, the lithium metal material belt 3 is adsorbed on the circular arc surface of the circular arc vacuum suction plate 81, and the lithium metal material belt 3 rotates along with the circular drum mechanism 8, so that the lithium metal material belt 3 moves at a constant speed;
and S5, the picosecond laser 9 cuts the lithium metal material belt 3 at the gap 82 between the circular arc-shaped vacuum suction plates, and the cut lithium metal pole pieces are blown to the vacuum belt 10 at the lowest part of the circular drum mechanism 8.
It should be noted that, in order to realize cutting of the lithium metal material strip 3, not only the picosecond laser 9 but also other cutting devices may be adopted, wherein the picosecond laser 9 may be replaced by a cutting hob.
The working principle and the working process of the solid-state battery lithium metal negative electrode sheet making device and method of the invention are briefly described below with reference to the accompanying drawings.
The lithium metal unreeling mechanism 1 automatically unreels, the mylar film reeling mechanism 2 reels a mylar film 4 led out from the lithium metal unreeling mechanism 1, a lithium metal material belt 3 drawn out from the lithium metal unreeling mechanism 1 passes through a roller 5, tab stitching is completed at a tab stitching mechanism 6, tab dotting is completed at a tab dotting mechanism 7, power of the whole lithium metal material belt 3 is provided through a circular drum mechanism 8, the lithium metal material belt 3 is adsorbed on a circular arc vacuum adsorption plate 81, vacuum suction is provided through a vacuum adsorption hole 811 on the circular arc vacuum adsorption plate, a picosecond laser 9 cuts the lithium metal material belt 3 at a gap 82 between the circular arc vacuum adsorption plates, and the cut lithium metal pole piece is blown to the vacuum belt 10 at the lowest position of the circular drum mechanism 8.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for preparing a lithium metal negative electrode sheet of a solid-state battery is characterized by comprising the following steps:
s1, automatically unreeling a lithium metal coil through a lithium metal unreeling mechanism (1), reeling through a mylar film (4) led out by a mylar film reeling mechanism (2), and separating a lithium metal material belt (3);
s2, pressing a copper foil lug on the surface of the lithium metal material belt (3) through a lug pressing mechanism (6); dotting the copper foil tabs through a tab dotting mechanism (7);
s3, adsorbing the lithium metal material belt (3) through a circular drum mechanism (8) provided with a plurality of circular arc-shaped vacuum adsorption plates (81), wherein the circular drum mechanism (8) rotates and drives the lithium metal material belt (3) to move at a constant speed;
and S4, cutting the lithium metal material belt (3) adsorbed on the circular drum mechanism (8) through a cutting device to form mutually independent lithium metal pole pieces.
2. The method for manufacturing a lithium metal negative electrode sheet for a solid-state battery according to claim 1, wherein the tab pressing mechanism (6) and the tab dotting mechanism (7) move along the moving direction of the lithium metal material tape (3) respectively, and the pressing process and the dotting process are completed respectively.
3. The method for manufacturing a lithium metal negative electrode sheet for a solid-state battery according to claim 1, wherein the cutting device is a picosecond laser (9), and the picosecond laser (9) is aligned with a gap (82) between the arc-shaped vacuum suction plates to cut the lithium metal material belt (3).
4. The method for producing a lithium metal negative electrode sheet for a solid-state battery according to claim 1, wherein the cut lithium metal electrode sheet is blown onto a vacuum belt (10) by the circular arc vacuum suction plate (81) at the lowest part of the circular drum mechanism (8).
5. A solid-state battery lithium metal negative pole sheet making device is characterized by comprising a lithium metal unreeling mechanism (1), a mylar film reeling mechanism (2), a tab pressing mechanism (6), a tab dotting mechanism (7), a circular drum mechanism (8), a cutting device and a plurality of rollers (5);
the circular drum mechanism (8) is provided with a plurality of arc-shaped vacuum suction plates (81) for absorbing the lithium metal material belt, and the circular drum mechanism (8) is also provided with a servo rotating motor for drawing the lithium metal material belt (3) to move at a constant speed; the cutting device is arranged on one side of the circular drum mechanism (8), a cutter head of the cutting device is aligned with a gap (82) between two adjacent circular arc vacuum suction plates, and the cutting device is used for cutting the lithium metal material belt (3) into independent lithium metal pole pieces.
6. The device for manufacturing the lithium metal negative electrode of the solid-state battery according to claim 5, wherein the circular drum mechanism is provided with (12) circular arc vacuum suction plates (81), and the circular arc vacuum suction plates (81) are distributed in an annular array; meanwhile, a large number of vacuum adsorption holes (811) are distributed on the surface of the circular arc-shaped vacuum adsorption plate (81).
7. The solid-state battery lithium metal negative electrode manufacturing device according to claim 5, characterized in that a vacuum belt (10) is arranged below the circular drum mechanism (8), and the vacuum belt (10) is used for receiving the cut lithium metal pole piece.
8. The solid-state battery lithium metal negative electrode production device of claim 5, wherein the tab pressing mechanism is disposed on a first servo shifting mechanism that drives the tab pressing mechanism to move left and right.
9. The solid state battery lithium metal negative electrode production device of claim 5, wherein the tab dotting mechanism is disposed on a second servo displacement mechanism that drives the tab dotting mechanism to move left and right.
10. The solid state battery lithium metal negative electrode manufacturing apparatus of claim 5, characterized in that the cutting apparatus is a picosecond laser (9) or a cutting hob.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211272377.3A CN115763683A (en) | 2022-10-18 | 2022-10-18 | Solid-state battery lithium metal negative electrode sheet manufacturing device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211272377.3A CN115763683A (en) | 2022-10-18 | 2022-10-18 | Solid-state battery lithium metal negative electrode sheet manufacturing device and method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116207330A (en) * | 2023-05-05 | 2023-06-02 | 广东捷盟智能装备有限公司 | Manufacturing equipment and manufacturing method of solid-state battery micro-battery core |
| CN116354142A (en) * | 2023-03-09 | 2023-06-30 | 三一技术装备有限公司 | Roller, sheet making system and battery cell production line |
| CN116404096A (en) * | 2023-03-09 | 2023-07-07 | 三一技术装备有限公司 | Film-making method and system |
| CN117438543A (en) * | 2023-10-30 | 2024-01-23 | 珠海欣视界科技有限公司 | Lithium metal pole piece manufacturing device, manufacturing method, lithium metal pole piece, secondary battery and electricity utilization device |
| CN116354142B (en) * | 2023-03-09 | 2024-06-25 | 三一技术装备有限公司 | Roller, sheet making system and battery cell production line |
-
2022
- 2022-10-18 CN CN202211272377.3A patent/CN115763683A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116354142A (en) * | 2023-03-09 | 2023-06-30 | 三一技术装备有限公司 | Roller, sheet making system and battery cell production line |
| CN116404096A (en) * | 2023-03-09 | 2023-07-07 | 三一技术装备有限公司 | Film-making method and system |
| CN116354142B (en) * | 2023-03-09 | 2024-06-25 | 三一技术装备有限公司 | Roller, sheet making system and battery cell production line |
| CN116207330A (en) * | 2023-05-05 | 2023-06-02 | 广东捷盟智能装备有限公司 | Manufacturing equipment and manufacturing method of solid-state battery micro-battery core |
| CN116207330B (en) * | 2023-05-05 | 2023-08-22 | 广东捷盟智能装备有限公司 | Manufacturing equipment and manufacturing method of solid-state battery micro-battery core |
| CN117438543A (en) * | 2023-10-30 | 2024-01-23 | 珠海欣视界科技有限公司 | Lithium metal pole piece manufacturing device, manufacturing method, lithium metal pole piece, secondary battery and electricity utilization device |
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