CN211757709U - Ultra-thin metal lithium paper tinsel coiling mechanism - Google Patents
Ultra-thin metal lithium paper tinsel coiling mechanism Download PDFInfo
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- CN211757709U CN211757709U CN201921953714.9U CN201921953714U CN211757709U CN 211757709 U CN211757709 U CN 211757709U CN 201921953714 U CN201921953714 U CN 201921953714U CN 211757709 U CN211757709 U CN 211757709U
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Abstract
A winding device for an ultrathin metal lithium foil is sequentially provided with a first active guide roller, a displacement sensor, a second active guide roller and a winding roller along the transmission direction of the metal lithium foil; a film unwinding roller is arranged beside the winding roller, and a film on the film unwinding roller is attached to the metal lithium foil together during winding and is wound by the winding roller in a traction manner; the displacement sensor is located above or below the position between the first driving guide roller and the second driving guide roller, the displacement sensor transmits a distance change signal from the surface of the metal lithium foil to the displacement sensor to the control circuit, and the control circuit adjusts the rotating speed of the winding roller in real time according to the distance change signal or adjusts the rotating speeds of the winding roller and the second driving guide roller so as to control the distance from the metal lithium foil to the displacement sensor to be unchanged, so that the metal lithium foil is controlled to be in a constant tension state. The utility model provides an easy fracture, tension control are not accurate among the ultra-thin metal lithium paper tinsel rolling process, the technical problem of very easily the adhesion between the adjacent layer of metal lithium paper tinsel of rolling.
Description
Technical Field
The utility model relates to a processing or production facility of lithium metal paper tinsel, in particular to ultra-thin lithium metal paper tinsel coiling mechanism.
Background
With the rapid development of portable electronic equipment and electric automobiles, the energy density of the traditional liquid lithium ion battery cannot meet the existing requirements, and meanwhile, the liquid electrolyte contains flammable organic solvents, so that the temperature suddenly rises when internal short circuit occurs, and combustion and even explosion are easily caused. The solid-state lithium battery has higher safety performance, higher energy density and longer cycle life, so the solid-state lithium battery is expected to replace the traditional liquid-state lithium battery. The metal lithium cathode material is one of the most main cathode materials of the all-solid-state lithium battery due to the advantages of high capacity and low potential, and the thickness of a metal lithium foil used in the all-solid-state lithium battery is generally required to be lower than 40 mu m. And the ultrathin metal lithium foil is used as the cathode of the all-solid-state lithium battery. At the present stage, a metal lithium foil is mainly prepared by an extrusion or rolling method, then the winding tension of the lithium foil is controlled by a tension controller, and then the lithium foil is wound into a disc by a winding roller for standby. Because metal lithium nature is soft, current lithium metal foil coiling mechanism is mainly applicable to the rolling of lithium foil thickness more than 100 mu m, but to the ultra-thin lithium metal foil that thickness is less than 100 mu m, especially thickness is less than 40 mu m, this kind of coiling mechanism is no longer applicable.
The ultra-thin metal lithium foil is light, thin and soft in nature, and can be easily broken under the action of external force. The existing winding device mainly adopts a tension roller or a mechanical floating roller to control tension, and because the ultrathin lithium foil is extremely thin and soft, the lithium foil is easy to break when applying pressure to the tension roller or is easy to break under the gravity action of the floating roller. In addition, after extrusion or rolling, the traditional mode is that the lithium foil drives the driven guide roller, but the ultra-thin metal lithium foil with the thickness of less than 40 mu m cannot drive the driven guide roller, and the lithium foil is easily broken.
The metal lithium foil is low in hardness and small in tensile strength, when the thickness of the lithium foil is lower than 100 mu m, the tension change of the lithium foil in the rolling process is small, the tension value is lower than 1N, the pressure change value applied to the tension roller is small, the gravity action of the floating roller on the lithium foil is easy to break, and the lithium foil tension is difficult to accurately and stably control. The method that two pairs of pinch rolls are arranged in front of a winding machine is adopted in the Chinese patent CN102615141A, and the tension of a lithium metal strip is controlled through the pinch rolls, so that the lithium metal strip is uniformly stressed, the lithium strip is prevented from being stretched, deformed or broken, and the tension cannot be accurately controlled.
The metal lithium foil is soft and sticky, and adjacent layers of the metal lithium foil wound into a disc are easy to adhere, so that the subsequent peeling and use of the metal lithium foil are seriously influenced. At present, in order to avoid the adhesion phenomenon, the method mainly adopted in industry is to coat anti-sticking oil such as white oil and silicone oil on the surface of the lithium foil, but the quality of the metal lithium foil is influenced, and the subsequent oil removal process is also increased.
Disclosure of Invention
The utility model provides an ultra-thin metal lithium paper tinsel coiling mechanism, its purpose is easy fracture, tension control not accurate in solving ultra-thin metal lithium paper tinsel rolling in-process, the technical problem of very easily the adhesion between the adjacent layer of metal lithium paper tinsel of rolling.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
the utility model provides an ultra-thin metal lithium paper tinsel coiling mechanism, along metal lithium paper tinsel direction of transfer, sets gradually first initiative deflector roll, displacement sensor, second initiative deflector roll and wind-up roll, wherein, first initiative deflector roll is driven by first drive motor, and second initiative deflector roll is driven by second drive motor, and the wind-up roll is driven by third drive motor.
The first driving guide roller and the second driving guide roller are both positioning guide rollers, and the first driving guide roller and the second driving guide roller are both positioned below the lithium metal foil and are in contact with the lithium metal foil; and the rotating directions of the first driving guide roller, the second driving guide roller and the winding roller are consistent with the conveying direction of the metal lithium foil.
And a film unwinding roller is arranged beside the winding roller, and a film on the film unwinding roller is attached to the metal lithium foil together and wound by the winding roller in a traction manner during winding.
The displacement sensor is positioned above or below the position between the first driving guide roller and the second driving guide roller and used for monitoring the change of the distance from the surface of the lithium metal foil to the displacement sensor; the displacement sensor is connected with a control circuit to transmit the distance change signal to the control circuit, and the control circuit adjusts the rotating speed of the winding roller in real time according to the distance change signal or adjusts the rotating speeds of the winding roller and the second active guide roller to control the distance from the metal lithium foil to the displacement sensor to be constant, so that the metal lithium foil is controlled to be in a constant tension state.
The relevant content in the above technical solution is explained as follows:
1. in the above scheme, the rotation directions of the first driving guide roller, the second driving guide roller and the winding roller are consistent with the transmission direction of the metal lithium foil. Its meaning includes two cases: if the guide roller is defined to rotate clockwise as positive rotation when observed from the side surface of the guide roller, the first condition is that the first active guide roller, the second active guide roller and the winding roller are all positive rotation, and the first active guide roller, the second active guide roller and the winding roller are all positioned below the metal lithium foil; and in the second condition, the first driving guide roller and the second driving guide roller rotate forwards, the wind-up roller rotates backwards, the first driving guide roller and the second driving guide roller are positioned below the metal lithium foil, and the wind-up roller is positioned above the metal lithium foil. In the invention, the first active guide roller and the second active guide roller can only be positioned below the lithium metal foil, and cannot be positioned above the lithium metal foil.
2. In the scheme, when the displacement sensor is arranged above the position between the first driving guide roller and the second driving guide roller, the distance between the displacement sensor and the metal lithium foil is increased, which indicates that the tension of the metal lithium foil is decreased, and at the moment, the control circuit adjusts and increases the rotating speed of the winding roller or increases the rotating speeds of the winding roller and the second driving guide roller so as to increase the tension of the metal lithium foil; the distance between the displacement sensor and the metal lithium foil is reduced, which shows that the tension of the metal lithium foil is increased, and the control circuit adjusts and reduces the rotating speed of the winding roller or reduces the rotating speeds of the winding roller and the second active guide roller so as to reduce the tension of the metal lithium foil.
When the displacement sensor is arranged at the lower position between the first driving guide roller and the second driving guide roller, the distance between the displacement sensor and the metal lithium foil is increased, which indicates that the tension of the metal lithium foil is increased, and at the moment, the control circuit adjusts and reduces the rotating speed of the winding roller or reduces the rotating speeds of the winding roller and the second driving guide roller so as to reduce the tension of the metal lithium foil; the distance between the displacement sensor and the metal lithium foil is reduced, which indicates that the tension of the metal lithium foil is reduced, and the control circuit adjusts and improves the rotating speed of the winding roller or improves the rotating speeds of the winding roller and the second active guide roller so as to improve the tension of the metal lithium foil.
3. In the above scheme, the first transmission motor, the second transmission motor and the third transmission motor are connected with a control circuit, and the displacement sensor is also connected with the control circuit. The control circuit controls the first drive motor to be in a constant rotation speed state. The displacement sensor transmits a distance change signal between the displacement sensor and the metal lithium foil to the control circuit, and the control circuit adjusts the rotating speed of the third transmission motor in real time according to the signal, or adjusts the rotating speeds of the third transmission motor and the second transmission motor so as to control the distance between the metal lithium foil and the displacement sensor to be unchanged, thereby controlling the metal lithium foil to be in a constant tension state.
4. In the above aspect, the film comprises at least one of a polypropylene film, a polyethylene terephthalate film, a polyamide film, a polyimide film, an aluminum foil, a copper foil, a tin foil, and a lead foil.
5. In the above scheme, the displacement sensor is a laser displacement sensor, a laser ranging sensor or an infrared ranging sensor.
6. In the above scheme, the device further comprises a first pressing roller, wherein the first pressing roller is arranged above the second driving guide roller. During the rolling, first compression roller is in the lifting state, does not contact with lithium metal foil, and when lithium metal foil finishes the ejection of compact, first compression roller pushes down contact lithium metal foil surface.
7. In the above scheme, the winding device further comprises a second pressing roller, and the second pressing roller is arranged beside the winding roller. During the rolling, the second compression roller is in the lifting state, does not contact with lithium metal foil, when lithium metal foil afterbody left second initiative deflector roll, the second compression roller pushes down contact lithium metal foil surface.
The utility model discloses theory of operation and advantage as follows:
the utility model discloses a two initiative deflector rolls pull metal lithium paper tinsel under drive motor's drive, set up a displacement sensor between two initiative deflector rolls and monitor the tension of metal lithium paper tinsel, displacement sensor sends its distance change signal to the control circuit on metal lithium paper tinsel surface, and control circuit adjusts the rotational speed of wind-up roll according to the distance change again, perhaps adjusts the rotational speed of wind-up roll and second initiative deflector roll, and the distance of control metal lithium paper tinsel to displacement sensor is unchangeable, thereby control the metal lithium paper tinsel is in permanent tension state. The rolling of the ultrathin metal lithium foil below 40 mu m is realized, the phenomenon of metal lithium foil breakage is avoided, and the tension of the metal lithium foil is controlled more accurately.
The metal lithium foil is wound together with the film during winding, adhesion between adjacent layers of the metal lithium foil is prevented, the use of a lubricant is avoided, and the metal lithium foil with higher quality is obtained.
The two compression rollers are arranged and are pressed down when the production of the metal lithium foil is finished, the tail part of the metal lithium foil is prevented from drifting and deviating, and the tail part of the metal lithium foil is kept flat.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a logic diagram of a control circuit.
In the above drawings: 1. an extruder box; 2. an extrusion stem; 3. extruding the inner cavity; 4. extruding the die; 5. a metallic lithium foil; 6. a first driving guide roller; 7. a first press roll; 8. a film unwinding roller; 9. a driven guide roller; 10. a film; 11. a second press roll; 12. a wind-up roll; 13. a second driving guide roller; 14. a displacement sensor; 15. and the metal lithium foil is limited below.
Detailed Description
The invention will be further described with reference to the following drawings and examples:
example (b): ultra-thin metal lithium paper tinsel coiling mechanism
Referring to fig. 1, the lithium metal foil winding device of the embodiment is suitable for 20 μm thick lithium foil manufactured by extrusion, and includes an extruder box 1, an extrusion rod 2, an extrusion inner cavity 3 and an extrusion die 4 are arranged in the extruder box 1, a first active guide roller 6, a displacement sensor 14 (in the embodiment, a laser displacement sensor), a second active guide roller 13 and a winding roller 12 are sequentially arranged along a conveying direction of a lithium metal foil 5, the displacement sensor 14 (in the embodiment, a laser displacement sensor) is arranged below a position between the first active guide roller 6 and the second active guide roller 13, a film unwinding roller 8 is arranged beside the winding roller 12, a film 10 (in the embodiment, a polyethylene film) is wound on the film unwinding roller 8, a first press roller 7 is arranged above the second active guide roller 13, and a second press roller 11 is arranged beside the winding roller 12, a driven guide roller 9 is arranged between the film unreeling roller 8 and the reeling roller 12.
When the embodiment works, the lithium metal foil 5 with the thickness of 20 mu m flows out of the extrusion die 4, is pulled to the winding roller 12 through the first driving guide roller 6 and the second driving guide roller 13, and when the head of the lithium metal foil 5 reaches the winding roller 12, the head of the thin film 10 on the thin film unwinding roller 8 is attached to the head of the lithium metal foil 5 and is adhered to a winding drum of the winding roller 12, and the lithium metal foil 5 and the thin film 10 are wound together. The displacement sensor 14 monitors the change of the distance between the lithium metal foil 5 and the displacement sensor 14 in real time, under the condition that the corresponding relation between the distance and the tension is determined, when the distance between the displacement sensor 14 and the lithium metal foil 5 is increased, the tension 5 of the lithium metal foil is increased, the displacement sensor 14 transmits a signal of the increased distance to the control circuit, and then the control circuit adjusts and reduces the rotating speed of the winding roller 12 to reduce the tension of the lithium metal foil 5; when the distance between the displacement sensor 14 and the lithium metal foil 5 is reduced, the tension of the lithium metal foil 5 is reduced, and the control circuit adjusts and increases the rotating speed of the winding roller 12 to increase the tension of the lithium metal foil 5. Finally, the distance from the lithium metal foil 5 to the displacement sensor 14 is controlled to be constant, so that the lithium metal foil 5 is controlled to be in a constant tension state. The control logic of the control circuit is shown in fig. 2, and the control process is easily understood by those skilled in the art in conjunction with fig. 2.
In the process that the extrusion die 4 extrudes the lithium metal foil 5, the first compression roller 7 and the second compression roller 11 are in a lifting state and are not in contact with the lithium metal foil 5, when the tail of the lithium metal foil 5 leaves the outlet of the extrusion die 4, the first compression roller 7 is pressed downwards to be in contact with the surface of the lithium metal foil 5, and when the tail of the lithium metal foil 5 leaves the second driving guide roller 13, the second compression roller 11 is pressed downwards to be in contact with the surface of the lithium metal foil 5.
Other embodiments and structural changes of the present invention are described below as follows:
1. in the above embodiment, the extruding machine is disposed in front of the first guide roller 6 to obtain the lithium metal foil 5 through the extruding process, but the present invention is not limited thereto, and the extruding machine and the rolling mill may be disposed in front of the first guide roller 6 to obtain the lithium metal foil 5 through the rolling process; or an extruder is arranged firstly, then a rolling mill is arranged, and the ultrathin metal lithium foil 5 is obtained by the thick lithium strip obtained by the extrusion process and then the rolling process.
1. In the above embodiment, the thickness of the metal lithium foil 5 is 20 μm, but the utility model discloses not only be applicable to the ultra-thin metal lithium foil that thickness is less than 40 μm, also be applicable to the metal lithium foil that thickness is higher than 40 μm.
2. In the above embodiment, after the corresponding relationship between the distance and the tension is determined, when the distance between the laser displacement sensor 14 and the lithium metal foil 5 becomes larger, the rotating speed of the wind-up roll 12 is adjusted and reduced in the above embodiment, but the utility model is not limited to this, and the rotating speed of the second active guide roll 13 can also be reduced at the same time.
3. In the above embodiment, after the corresponding relationship between the distance and the tension is determined, when the distance between the displacement sensor 14 and the lithium metal foil 5 is decreased, the rotation speed of the wind-up roll 12 is increased by adjusting the above embodiment, but the present invention is not limited to this, and the rotation speed of the second active guide roll 13 may also be increased at the same time.
4. In the above embodiments, the displacement sensor 14 is located below between the first active guide roller 6 and the second active guide roller 13, but the present invention is not limited to this, and may be located above between the first active guide roller 6 and the second active guide roller 13.
5. In the above embodiment, displacement sensor 14 is laser displacement sensor, but the utility model discloses not be limited to this, also can be laser range sensor or infrared distance measuring sensor, in fact as long as the distance of accurate monitoring displacement sensor 14 to metal lithium foil 5 surface can.
6. In the above embodiment, the film 10 is a polyethylene film, but the present invention is not limited thereto, and may include at least one of a polypropylene film, a polyethylene terephthalate film, a polyamide film, a polyimide film, an aluminum foil, a copper foil, a tin foil, and a lead foil.
7. In the above embodiment, the wind-up roll 12 is located below the lithium metal foil 5, but the present invention is not limited thereto, and the wind-up roll 12 may also be located above the lithium metal foil 5.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (5)
1. The utility model provides an ultra-thin metal lithium paper tinsel coiling mechanism which characterized in that: a first active guide roller (6), a displacement sensor (14), a second active guide roller (13) and a winding roller (12) are sequentially arranged along the conveying direction of the metal lithium foil (5), wherein the first active guide roller (6) is driven by a first transmission motor, the second active guide roller (13) is driven by a second transmission motor, and the winding roller (12) is driven by a third transmission motor;
the first active guide roller (6) and the second active guide roller (13) are both positioning guide rollers, and the first active guide roller (6) and the second active guide roller (13) are both positioned below the lithium metal foil (5) and are in contact with the lithium metal foil (5); the rotating directions of the first driving guide roller (6), the second driving guide roller (13) and the winding roller (12) are consistent with the conveying direction of the lithium metal foil (5);
a film unwinding roller (8) is arranged beside the winding roller (12), and a film (10) on the film unwinding roller (8) is attached to the metal lithium foil (5) during winding and is wound by the winding roller (12) in a traction manner;
the displacement sensor (14) is positioned above or below the position between the first active guide roller (6) and the second active guide roller (13), and the displacement sensor (14) is used for monitoring the distance change from the surface of the lithium metal foil (5) to the displacement sensor (14); the displacement sensor (14) is connected with a control circuit to transmit the distance change signal to the control circuit, and the control circuit adjusts the rotating speed of the winding roller (12) in real time according to the distance change signal or adjusts the rotating speeds of the winding roller (12) and the second active guide roller (13) to control the distance from the lithium metal foil (5) to the displacement sensor (14) to be constant, so that the lithium metal foil (5) is controlled to be in a constant tension state.
2. The winding device according to claim 1, characterized in that: the first transmission motor, the second transmission motor and the third transmission motor are all servo motors or stepping motors.
3. The winding device according to claim 1, characterized in that: the displacement sensor (14) is a laser displacement sensor, a laser ranging sensor or an infrared ranging sensor.
4. The winding device according to claim 1, characterized in that: still include first compression roller (7), first compression roller (7) are located second initiative deflector roll (13) top.
5. The winding device according to claim 1, characterized in that: still include second compression roller (11), second compression roller (11) are located by wind-up roll (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921953714.9U CN211757709U (en) | 2019-11-13 | 2019-11-13 | Ultra-thin metal lithium paper tinsel coiling mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921953714.9U CN211757709U (en) | 2019-11-13 | 2019-11-13 | Ultra-thin metal lithium paper tinsel coiling mechanism |
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| Publication Number | Publication Date |
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| CN211757709U true CN211757709U (en) | 2020-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921953714.9U Active CN211757709U (en) | 2019-11-13 | 2019-11-13 | Ultra-thin metal lithium paper tinsel coiling mechanism |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114039024A (en) * | 2021-11-08 | 2022-02-11 | 上海联净电子科技有限公司 | Method and device for producing graphite electrode material of aqueous battery |
| CN114700416A (en) * | 2022-04-07 | 2022-07-05 | 广东捷盟智能装备有限公司 | Stripping process of ultrathin lithium foil |
-
2019
- 2019-11-13 CN CN201921953714.9U patent/CN211757709U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114039024A (en) * | 2021-11-08 | 2022-02-11 | 上海联净电子科技有限公司 | Method and device for producing graphite electrode material of aqueous battery |
| CN114700416A (en) * | 2022-04-07 | 2022-07-05 | 广东捷盟智能装备有限公司 | Stripping process of ultrathin lithium foil |
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