CN204558583U - Lithium band production equipment - Google Patents

Abstract

The utility model discloses a lithium strip production equipment, which comprises a rolling device sequentially arranged in the traveling direction of the lithium strip for rolling and bonding the stacked first substrate, the lithium strip and the second substrate, A film stripping device for peeling off the second base material bonded to the lithium tape and a passivation device for passivating the exposed surface of the lithium tape after peeling off. The lithium strip production equipment of the present utility model transports the lithium strip, the first base material and the second base material to the roller pressing device through the deviation correcting device respectively through the lithium strip unwinding device, the first unwinding device and the second unwinding device, and the lithium strip The belt is not in direct contact with the rolling device, so it will not stick to the roller and is not easy to break the belt.

Description

Lithium ribbon production equipment

technical field

The utility model relates to the field of lithium ion batteries, in particular to a lithium belt production equipment.

Background technique

Lithium is hailed as the "Energy Star" by scientists, and secondary batteries using lithium as the negative electrode active material have unparalleled advantages. However, due to the active chemical nature of lithium, it is easy to react with oxygen, nitrogen, moisture, etc. in the air at room temperature, so the processing of battery-grade lithium ribbons faces high challenges. Generally, battery-grade lithium ribbons are prone to sticking during the production process, resulting in broken ribbons.

Utility model content

The purpose of the utility model is to provide a lithium ribbon production equipment which is not sticky and is not easy to break.

In order to achieve the above-mentioned purpose, the utility model proposes a lithium strip production equipment, which includes the first base material, the lithium strip and the second base material that are stacked and placed sequentially in the direction of travel of the lithium strip. A combined roll pressing device is used to peel off the second substrate bonded with the lithium tape.

Further, a lithium ribbon unwinding device for conveying the lithium ribbon to the rolling device is also provided before the rolling device,

The lithium ribbon unwinding device comprises a lithium ribbon unwinding roller, a lithium ribbon magnetic powder controller, a lithium ribbon speed test roll and a lithium ribbon tension control roller; the lithium ribbon magnetic powder controller is placed on the side of the lithium ribbon unwinding roller, To control the lithium ribbon unwinding speed in the lithium ribbon unwinding device; the lithium ribbon speed test roller is arranged between the lithium ribbon unwinding roller and the lithium ribbon tension control roller.

Further, a first unwinding device for conveying the first base material to the rolling device is also provided before the rolling device of the lithium strip,

The first unwinding device includes a first unwinding roller, a first magnetic powder controller, a first speed test roller, a first tension control roller and a first traction roller; in the first unwinding device, the first An unwinding roller unwinds the first base material under the control of the first magnetic powder controller, the first speed test roller is arranged between the first unwinding roller and the first tension control roller, and the first A pulling roller is arranged in front of the entrance of the rolling device for pulling the first base material into the rolling device.

Further, a second unwinding device for conveying a second base material to the rolling device is also provided before the rolling device of the lithium strip, and the first unwinding device is connected to the second unwinding device. The devices are respectively located on both sides of the lithium ribbon unwinding device,

The second unwinding device includes a second unwinding roller, a second magnetic powder controller, a second speed test roller, a second tension control roller and a second traction roller; in the second unwinding device, the first The second unwinding roller unwinds the second substrate under the control of the second magnetic powder controller, the second speed test roller is arranged between the second unwinding roller and the second tension control roller, and the first Two pulling rollers are arranged in front of the entrance of the rolling device for pulling the second base material into the rolling device.

Further, a deviation rectifier is also provided between the entrance of the rolling device and the first traction roller and the second traction roller, and the first traction roller and the second traction roller are respectively located at the On both sides of the device, and adjacent to the rectifier and the lithium belt.

Further, the rolling device includes a cylinder, a bearing plate, a work roll, a pressure controller, a speed controller, a gap controller and a gap adjustment mechanism;

the cylinder accommodates the carrier plate and the work roll;

The bearing plate includes a first bearing plate and a second bearing plate arranged at intervals; the first bearing plate and the second bearing plate are slidably arranged in the cylinder;

The work rolls include first work rolls and second work rolls arranged at intervals; the first work rolls and the second work rolls are respectively arranged on the first bearing plate and the second bearing plate;

The pressure controller controls the pressure of the first work roll and the second work roll on the feed lithium strip;

the speed controller controls the speed of the first work roll and the second work roll to the feed lithium ribbon;

the gap controller controls a gap between the first work roll and the second work roll;

The gap adjustment mechanism adjusts a gap between the first work roll and the second work roll.

Further, the rolling device further includes a built-in deviation corrector arranged in the cylinder, and the built-in deviation corrector is located between the gap between the first work roll and the second work roll and the between membrane devices.

Further, the stripping device includes a conveying roller, a deviation control roller, a speed test roller and a winding roller;

In the film stripping device, the conveying roller, the deviation correction control roller, the speed test roller and the take-up roller are arranged at intervals in the vertical direction, and the conveying roller is adjacent to the lithium strip .

Further, a passivation device for passivating the exposed surface of the stripped lithium strip is also included.

Further, a winding device is also provided after the passivation device,

The winding device includes a speed control roller, a deviation correction control roller and a winding roller; in the winding device, the deviation correction control roller is arranged between the speed control roller and the winding roller.

In the lithium strip production equipment in the embodiment of the utility model, a rolling device, a film stripping device, and a passivation device are sequentially arranged in the traveling direction of the lithium strip, and the lithium strip, the first base material and the second base material can be transported to the roller pressing device, and by adjusting parameters such as the gap, pressure and speed of the rolling device to obtain a lithium strip of corresponding thickness; The material and the second substrate are peeled and wound. The two sides of the lithium ribbon are respectively covered by the first base material and the second base material. Therefore, the lithium ribbon is not in direct contact with the rolling device, so it will not stick to the roll and is not easy to break the ribbon. The lithium strip production equipment in an embodiment of the present invention can produce metal lithium strips with a uniform thickness of 1-20 μm. In addition, the structure of the lithium strip production equipment is simple, which can greatly reduce the cost and is conducive to industrial production.

Description of drawings

Fig. 1 is a structural schematic diagram of lithium strip production equipment in an embodiment of the present invention.

Fig. 2 is a schematic diagram of the cooperative structure of the rolling device, the peeling device and the passivation device in an embodiment of the present invention.

Fig. 3 is a schematic flow chart of a lithium strip production method in an embodiment of the present invention.

Detailed ways

The principles and features of the present utility model are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the utility model, and are not used to limit the scope of the utility model. For those of ordinary skill in the art, all embodiments obtained according to the spirit of the present utility model, on the premise of not paying creative efforts, belong to the protection scope of the present utility model.

Fig. 1 is a structural schematic diagram of lithium strip production equipment in an embodiment of the present invention. As shown in Fig. 1, lithium ribbon production equipment 100 comprises lithium ribbon unwinding device 110, first unwinding device 120, second unwinding device 130, deviation corrector 141, sealing working chamber 150, rolling device 160, stripping film Device 170 , passivation device 180 and winding device 190 . Wherein, the lithium ribbon 210, the first base material 220 and the second base material 230 transported by the lithium ribbon unwinding device 110, the first unwinding device 120 and the second unwinding device 130 respectively enter into the sealing work place through the rectifier 141. The rolling device 160 in the chamber 150; after being rolled by the rolling device 160, the peeling device 170 removes the second base material 230 from the lithium strip 210, the first base material 220 and the second base material 230 pressed together peeling and winding; after that, the winding device 190 winds the lithium ribbon 210 processed by the passivation device 180 and the first substrate 220 bonded to the lithium ribbon 210 .

Specifically, the lithium ribbon unwinding device 110 includes a lithium ribbon unwinding roller 111 , a lithium ribbon speed test roller 112 and a lithium ribbon tension control roller 113 . Wherein, the lithium ribbon unwinding roller 111 is used to install the lithium ribbon 210 to be processed. The incoming thickness range of the processed lithium ribbon 210 may be 0.040-1500mm. In one embodiment, the lithium ribbon unwinding roller 111 can unwind the lithium ribbon 210 under the control of the lithium ribbon magnetic powder controller 1111 to ensure that the lithium ribbon 210 maintains a certain tension during the unwinding process. The torque range of the magnetic powder controller 1111 can be 2-400N/m, and the precision can be ±1N/m.

The lithium ribbon speed testing roller 112 is arranged between the lithium ribbon unwinding roller 111 and the lithium ribbon tension control roller 113 . When the lithium ribbon production equipment 100 was in the position shown in Fig. 1, the unwinding roller 111, the lithium ribbon speed test roller 112 and the lithium ribbon tension control roller 113 were arranged at intervals in the vertical direction, and the lithium ribbon speed test roller 112 was positioned at the lithium ribbon Below the unwinding roller 111 and above the lithium ribbon tension control roller 113 . The lithium strip speed test roll 112 can be used to test and control the speed of unwinding the lithium strip 210 to ensure that the speed of the lithium strip 210 before feeding meets the tension requirements of the lithium strip unwinding roll 111 and the lithium strip tension control roll 113. In an embodiment, the speed range of the speed test roller 112 may be 0.01-300m/min, and the accuracy may be ±0.01m/min.

The tension control roller 113 can be used to ensure that the lithium ribbon 210 keeps feeding straightly during the conveying process, and the lithium ribbon 210 does not pile up or break. The tension control roller 113 can also be used to adjust the tension of the lithium ribbon 210 during the unwinding process. In an embodiment, the torque control range of the tension control roller 113 may be 5-250 N/m, and the precision may be ±1 N/m. When the lithium ribbon production equipment 100 is in the position shown in FIG. 1 , the lithium ribbon 210 conveyed toward the deflection corrector 141 and the rolling device 160 through the tension control roller 113 travels substantially along the horizontal direction.

The first unwinding device 120 is disposed between the lithium ribbon unwinding device 110 and the deflection corrector 141 . The first unwinding device 120 includes a first unwinding roller 121 , a first speed test roller 122 , a first tension control roller 123 and a first pulling roller 124 . When the lithium ribbon production equipment 100 was in the position shown in Figure 1, the first unwinding roller 121, the first speed test roller 122, the first tension control roller 123 and the first traction roller 124 were vertically from top to bottom They are arranged at intervals, and the first pulling roller 124 is located above the lithium belt 210 .

Wherein, the first unwinding roller 121 is used for installing the first substrate 220 . The material of the first substrate 220 cannot react with the lithium ribbon 210 . The thickness of the first substrate 220 may range from 1-3000 μm. In one embodiment, the material of the first substrate 220 can be Teflon, polyethylene, polypropylene, polyurethane, polytetrafluoroethylene, polyarylsulfone polyethylene terephthalate ether, acrylonitrile-butylene One or more combinations of ethylene-styrene copolymer, polyimide, polyethersulfone, copper foil, aluminum foil, non-woven fabric, glassine paper or fiber paper, and preferably acrylonitrile-butadiene- Styrene copolymers and polyimides have high tensile strength and good elastic deformation, which can play a good role in buffering and protecting the lithium strip to be rolled. The first unwinding roller 121 can unwind the first substrate 220 under the control of the first magnetic powder controller 1211 to ensure that the first substrate 220 maintains a certain tension during the unwinding process. The torque range of the first magnetic powder controller 1211 can be 2-400N/m, and the precision can be ±1N/m.

The first speed testing roller 122 is disposed between the first unwinding roller 121 and the first tension control roller 123 . The first speed test roller 122 can be used to test and control the speed of unwinding the first substrate 220, to ensure that the speed of the first substrate 220 before feeding meets the tension of the first unwinding roller 121 and the first tension control roller 123 Require. In an embodiment, the speed range of the first speed testing roller 122 may be 0.01-300 m/min, and the accuracy may be ±0.01 m/min.

The first tension control roller 123 can be used to ensure that the first substrate 220 is kept in a straight line during the conveying process, and the first substrate 220 does not pile up or deform. The first tension control roller 123 can also be used to adjust the tension of the first base material 220 during the unwinding process. In an embodiment, the torque control range of the first tension control roller 123 may be 5-250 N/m, and the precision may be ±1 N/m.

The first pulling roller 124 is disposed above the lithium belt 210 and adjacent to the web corrector 141 . Pulling rollers 124 may be used to guide first substrate 220 into webmaster 141 .

The second unwinding device 130 is disposed between the lithium ribbon unwinding device 110 and the deviation corrector 141 , and is located on both sides of the lithium ribbon 210 or the deviation corrector 141 with the first unwinding device 120 . When the lithium ribbon production equipment 100 was in the position shown in Fig. 1, the second unwinding device 130 was positioned under the lithium ribbon 210 or the deviation corrector 141, and the first unwinding device 120 was located above the lithium ribbon 210 or the deviation corrector 141, i.e. The first unwinding device 120 and the second unwinding device 130 are located on both sides of the lithium ribbon 210 or the straightener 141 in the vertical direction.

Wherein, the second unwinding device 130 includes a second unwinding roller 131 , a second speed testing roller 132 , a second tension control roller 133 and a second pulling roller 134 . The second unwinding roller 131 is used for installing the second substrate 230 . The material of the second substrate 230 cannot react with the lithium ribbon 210 . The thickness of the second substrate 230 may range from 1-3000 μm. In one embodiment, the material of the second substrate 230 can be Teflon, polyethylene, polypropylene, polyurethane, polytetrafluoroethylene, polyarylsulfone polyethylene terephthalate ether, acrylonitrile-butane One or more combinations of ethylene-styrene copolymer, polyimide, polyethersulfone, copper foil, aluminum foil, non-woven fabric, glassine paper or fiber paper, preferably acrylonitrile-butadiene-styrene Copolymers and polyimides, whose materials have greater tensile strength and better elastic deformation, can play a better role in buffering and protecting the lithium belt to be rolled. The second unwinding roller 131 can unwind the second base material 230 under the control of the second magnetic powder controller 1311 to ensure that the second base material 230 maintains a certain tension during the unwinding process. The torque range of the magnetic powder controller 1311 can be 2-400N/m, and the precision can be ±1N/m.

The second speed testing roller 132 is disposed between the second unwinding roller 131 and the second tension control roller 133 . The second speed test roller 132 can be used for testing and controlling the speed of unwinding the second substrate 230, to ensure that the speed of the second substrate 230 before feeding meets the tension of the second unwinding roller 131 and the second tension control roller 133 Require. In an embodiment, the speed range of the second speed testing roller 122 may be 0.01-300 m/min, and the accuracy may be ±0.01 m/min.

The second tension control roller 133 can be used to ensure that the second substrate 230 maintains a straight-line feed during the conveying process, and the second substrate 230 does not pile up or deform. The second tension control roller 133 can also be used to adjust the tension of the second base material 230 during the unwinding process. In an embodiment, the torque control range of the second tension control roller 133 may be 5-250 N/m, and the precision may be ±1 N/m.

The second pulling roller 134 is disposed below the lithium belt 210 , adjacent to the deviation corrector 141 and corresponding to the first pulling roller 124 . The second pulling roller 134 may be used to guide the second substrate 230 into the webmaster 141 . By arranging the first pulling roller 124 and the second pulling roller 134 near the deviation corrector 141 on both sides of the lithium belt 210, the first base material 220 and the second base material 230 can be guided to the lithium belt 210 from both sides of the lithium belt 210 and introduced into the straightening device 141 , so that the first base material 220 and the second base material 230 can be attached to both sides of the lithium ribbon 210 more uniformly and more flatly.

As shown in FIG. 2 , the deviation corrector 141 is arranged on the right side of the rolling device 160 (when the lithium ribbon production equipment 100 is in the position shown in FIG. 1 ), such as the feeding side. The deflector 141 can be used to ensure that the lithium ribbon 210 , the first substrate 220 and the second substrate 230 maintain a certain position and enter the rolling device 160 . The deflector 141 can also be used to ensure that the lithium ribbon 210 , the first substrate 220 and the second substrate 230 enter the rolling device 160 at the same speed.

The sealed working chamber 150 is used to provide the working atmosphere of the whole device. In one embodiment, the humidity in the sealed working chamber 150 is required to be 1%-50%, and the temperature is required to be between 10-35°.

The rolling device 160 includes a cylinder 214 , a bearing plate 215 , a work roll 216 , a pressure controller 211 , a speed controller 212 , a gap controller 213 and a gap adjusting mechanism 217 .

Wherein, the air cylinder 214 is used to accommodate the carrying plate 215 and the work rolls 216 , and is used to control the air pressure or hydraulic pressure on both sides of the carrying plate 215 so that the carrying plate 215 slides in the air cylinder 214 and moves to a preset position. The air cylinder 214 is also used to control the feedback of the pressure, so as to prevent the first substrate 220 , the second substrate 230 and the lithium ribbon 210 from being subjected to excessive pressure during the rolling process, resulting in fluctuations in the roll gap.

The carrying plate 215 includes a first carrying plate 215a and a second carrying plate 215b arranged at intervals. The first bearing plate 215 a and the second bearing plate 215 b are slidably disposed in the cylinder 214 . By adjusting the air pressure or hydraulic pressure on both sides of the first carrying plate 215a/the second carrying plate 215b, the first carrying plate 215a/the second carrying plate 215b slides in the cylinder 214 and moves to a preset position.

Work rolls 216 may be used to roll lithium ribbon 210 , first substrate 220 and second substrate 230 . In an embodiment, the working roll 216 may have a roll diameter of 20-1000 mm, and a surface hardness of 60-100 Rockwell hardness. The material of the work roll 216 may be one or more combinations of materials such as polyethylene, polypropylene, Teflon, polyimide, polycarbonate, stainless steel, and molybdenum.

The work rolls 216 include a first work roll 216a and a second work roll 216b arranged at intervals. The first work roll 216a and the second work roll 216b can be respectively arranged on the first carrying plate 215a and the second carrying plate 215b through the bracket 219, so that the first carrying plate 215a and/or the second carrying plate 215b can be moved in the air cylinder 214 in motion. By adjusting the air pressure or hydraulic pressure on both sides of the first carrying plate 215a/the second carrying plate 215b, the speeds of the first carrying plate 215a/the second carrying plate 215b and the first working roll 216a/the second working roll 216b can be individually adjusted. In one embodiment, the speed of the first work roll 216 a and the second work roll 216 b to feed the lithium ribbon 210 can be controlled within 0.01-300 m/min, with an accuracy of ±0.01 m/min.

The pressure controller 211 can be used to control the pressure of the work roll 216 on the feed lithium strip 210, the first substrate 220 and the second substrate 220, the pressure control range can be 0.2-1.5MPa, and the precision can be ±0.01MPa.

The speed controller 212 can be used to control the speed of the work roll 216 to the feed lithium belt 210, the speed range of the work roll 216 to the feed lithium belt 210 can be 0.01-300m/min, and the accuracy can be ±0.01m/min.

The gap controller 213 can be used to control the gap between the first work roll 216a and the second work roll 216b, the gap control range can be 0-1.5mm, and the precision can be ±0.001mm.

The gap adjustment mechanism 217 can be used to adjust the gap between the first work roll 216 a and the second work roll 216 b, which is a feedback to the gap controller 213 .

The peeling device 170 is arranged on the left side of the rolling device 160 (when the lithium ribbon production equipment 100 is in the position shown in FIG. 1 ), such as the discharge side.

Please continue to refer to FIG. 2 , the stripping device 170 includes a conveying roller 311 , a deviation control roller 312 , a speed test roller 313 and a take-up roller 314 . When the lithium strip production equipment 100 is in the position shown in Fig. 1, the conveying roller 311, the film stripping correction control roller 312, the film stripping speed test roller 313 and the film stripping rewinding roller 314 are vertically spaced from top to bottom , and the transmission roller 311 is located below the lithium belt 210 .

Wherein, the delivery roller 311 is used to pull the second base material 230 peeled off from the lithium strip 210, the first base material 220 and the second base material 230 (hereinafter referred to as "peeled") from the lithium strip 210, the first base material 220 and the second base material 230 pressed together by the rolling device 160. The second substrate 230"), so that the second substrate 230 is continuously peeled off from the lithium strip 210, the first substrate 220 and the second substrate 230 pressed together by the rolling device 160. In the actual production process, when the second substrate 230 is peeled off, the second substrate 230 will exert a force on the lithium ribbon 210, and this force makes the lithium ribbon 210 tend to be separated from the first substrate 220; The force applied by the second base material 230 to the lithium ribbon 210 to prevent the lithium ribbon 210 from being separated from the first base material 220 when the material 230 is formed, and the conveying roller 311 can pull the peeled lithium ribbon along a direction with an angle of less than 60° with the horizontal direction. The second base material 230 is such that the second base material 230 is continuously peeled off from the lithium strip 210 , the first base material 220 and the second base material 230 pressed together by the rolling device 160 .

In addition, in order to further reduce the influence of the force exerted by the second substrate 230 on the lithium ribbon 210 when the second substrate 230 is peeled off to prevent the lithium ribbon 210 from being separated from the first substrate 220, the rolling device 160 can be installed in the cylinder 214 Built-in deviation corrector 221; the lithium strip 210, the first base material 220 and the second base material 230 pressed together by the rolling device 160 pass through the built-in deviation corrector 221, and the second base material 230 is pressed together by the rolling device 160 The lithium tape 210 , the first base material 220 and the second base material 230 are peeled together and pulled by the transfer roller 311 . By setting the deflection corrector 221 , the influence of the stripping operation on the rolling operation of the rolling device 160 can be reduced or eliminated.

The stripping correction control roller 312 can be used to correct the transport position of the stripped second substrate 230 during the winding process. In an embodiment, the torque control range of the stripping deflection correction control roller 312 may be 5-250 N/m, and the accuracy may be ±1 N/m.

The peeling speed test roller 313 can be used to detect and control the traveling speed of the peeled second substrate 230 . The speed control range of the peeling speed test roller 313 can be 0.01-300m/min, and the precision can be ±0.01m/min.

The peeling and winding roll 314 can be used to wind the peeled second substrate 230 . In one embodiment, the stripping film winding roller 314 can be wound up under the control of the film stripping magnetic powder controller 3141, so as to ensure that the stripped second substrate 230 passes through the stripping film correction control roller 312 and has a certain degree of stability during the winding process. tension, so as to ensure that the peeled second base material 230 does not pile up or break during the winding process. In one embodiment, the torque range of the peeling magnetic powder controller 3141 can be 2-400N/m, and the precision can be ±1N/m.

In the traveling direction of the lithium strip 210 , the passivation device 180 is located behind the stripping device 170 , that is, the lithium strip 210 first passes through the stripping device 170 and then passes through the passivation device 180 . The passivation device 180 includes a passivation gas bottle 321 , an air pump 322 , a control component 323 , a gas pipeline 324 and a gas nozzle 345 .

Wherein, the passivation gas bottle 321 can be used for supplying and storing the passivation gas. The passivating gas can be carbon dioxide or nitrogen dioxide.

The pneumatic pump 322 is sealed and connected between the passivation gas bottle 321 and the control unit 323 through the gas pipeline 324 . The air pump 322 is used to control the passivation gas to provide high-pressure gas to the surface of the stripped lithium strip 210 .

The control component 323 is sealed and connected between the air pump 322 and the gas nozzle 345 through the gas pipeline 324 . When the inert gas in the sealed working chamber 150 is full, the control part 323 turns off the air pump 322; when the equipment needs to be shut down for maintenance, the control part 323 can stop the gas supply of the passivation gas bottle 321.

The gas nozzle 345 is suspended below the stripped lithium strip 210, and is used to spray passivation gas on the surface of the stripped lithium strip 210 to passivate the stripped lithium strip 210 surface, so that the stripped lithium strip A passivation film is formed on the surface of the 210, so that the rolled lithium ribbon 210 can be quickly passivated after being separated from the peeling area, thereby preventing the lithium ribbon 210 from reacting with air. In an embodiment, the passivation time may be 5-180s.

In the traveling direction of the lithium ribbon 210 , the winding device 190 is located behind the passivation device 180 , that is, the lithium ribbon first passes through the passivation device 180 and then passes through the winding device 190 . The winding device 190 includes a winding speed control roller 331 , a winding deviation correction control roller 332 and a winding roller 333 .

The winding speed control roller 331 can be used to pull the passivated lithium strip 210 containing a single layer of the first substrate 220 to advance, and maintain a certain advance speed. In an embodiment, the speed control range of the winding speed control roller 331 may be 0.01-300 m/min, and the accuracy may be ±0.01 m/min.

The winding correction control roller 332 is disposed between the winding speed control roller 331 and the winding roller 333 , and is used to correct the conveying position of the lithium strip 210 containing the single-layer first substrate 220 during the winding process. The torque control range of the deviation correction control roller 332 can be 5-250N/m, and the precision can be ±1N/m.

The winding roller 333 is used for winding the lithium ribbon 210 containing the single-layer first substrate 220 . In one embodiment, the winding roller 333 can be wound under the control of the winding magnetic powder controller 3331, so as to ensure that the lithium ribbon 210 containing the single-layer first substrate 220 has a certain degree of stability during the winding process after passing the deviation correction control roller 332. Tension, so as to ensure that the lithium ribbon 210 containing the single-layer first substrate 220 does not pile up or break during the winding process. The torque range of winding magnetic powder controller 3331 can be 2-400N/m, and the precision can be ±1N/m.

As mentioned above, the lithium ribbon production equipment 100 is provided with a lithium ribbon unwinding device 110, a deviation corrector 141, a rolling device 160, a stripping device 170, a passivation device 180, a winding device 190 and The first unwinding device 120 and the second unwinding device 130 are arranged between the lithium ribbon unwinding device 110 and the deviation corrector 141, and the lithium ribbon unwinding device 110, the first unwinding device 120 and the second unwinding device 130 can pass through The lithium ribbon 210, the first base material 220 and the second base material 230 are transported to the rolling device 160 through the deviation corrector 141, and the lithium ribbon 210 of corresponding thickness is obtained by adjusting the parameters such as the gap, pressure and speed of the rolling device 160 ; and the second base material 230 is peeled off and rolled from the lithium strip 210, the first base material 220 and the second base material 230 pressed together by the rolling device 160 by the stripping device 170; after that, the winding device 190 winds up the lithium ribbon 210 processed by the passivation device 180 and the first substrate 220 bonded to the lithium ribbon 210 , and completes the production process of the lithium ribbon 210 .

After the second substrate 230 is peeled off from the lithium ribbon 210, the first substrate 220 and the second substrate 230 pressed together by the rolling device 160 by the stripping device 170, one side surface of the lithium ribbon 210 is exposed , so that the rolled lithium strip 210 can be quickly passivated by the passivation device 180 after leaving the stripping area, preventing the lithium strip 210 from reacting with the air, making the lithium strip 210 long-term storage, and greatly reducing the factory's need for solid particle lithium powder reliance and reduce production costs.

In addition, when the lithium ribbon 210 is rolled by the rolling device 160, the two side surfaces of the lithium ribbon 210 are respectively covered by the first base material 220 and the second base material 230, so the lithium ribbon 210 is not in contact with the rolling device. 160 direct contact, so there will be no non-stick rolls and not easy to break the belt. In an embodiment of the utility model, the lithium strip production equipment 100 can produce metal lithium strips with a uniform thickness of 1-20 μm. In addition, the lithium strip production equipment 100 has a simple structure, can greatly reduce costs, and is beneficial to industrial production.

The above is the specific structure of the lithium ribbon production equipment 100 in an embodiment of the present invention, and the usage method of the lithium ribbon production equipment 100 will be described below with specific examples.

example 1

With reference to Fig. 1, turn on the switch of rolling device 160, utilize the parameter regulator in the rolling device 160 to set pressure controller 211 to be adjusted to 0.8MPa, speed controller 212 to be adjusted to 30m/min, gap regulator 213 to be adjusted to 0.02mm, And use the small piece of lithium strip 210, the first base material 220 and the second base material 230 to carry out the pre-test machine on the roller of the rolling device 160; after the thickness requirement of the desired lithium strip is 5 μm, turn off the power supply by fine-tuning the speed, gap and pressure .

The unwinding roller 111 of the lithium ribbon unwinding device 110, the lithium ribbon speed control roller 112, the lithium ribbon tension control roller tension control roller 113 walk through the lithium ribbon 210, and simultaneously the first unwinding roller 121 of the first unwinding device 120 , the first speed control roller 122, the first tension control roller 123 walk through the first base material 220, and the unwinding roller 131, the speed control roller 132, the tension control roller 133 of the second unwinding device 130 walk through the second base material Material 230. Afterwards, the lithium strip 210, the first substrate 220 and the second substrate 230 are passed through the rectifier 141, and the lithium strip 210, the first substrate 220 and the second substrate 230 are passed through the rollers of the rolling device 160 slit; the stripped second substrate 230 passes through the conveying roller 311, the stripping speed control roller 312, the stripping tension control roller 313, and reaches the stripping winding roller 314; The belt 210 reaches the subsequent take-up roll 333 through threading, and finally the unrolled lithium belt 210 containing the single-layer first substrate 220 is fixed on the take-up roll 333 .

Adjust the air pressure of the inert gas to 0.5MPa, adjust the parameters of the rolling device 160 back to the state of the previous debugging, and adjust the speed control rolls 112, 122, 132, 312, 331 and work rolls 216 to 30m/min, and The tension control rollers 113, 123, 133, 313, 332 were adjusted to 10 N/m. At this point, press the start button of the lithium ribbon production equipment 100, the lithium ribbon 210 of 5 μm required can be obtained by rolling, and the surface of the lithium ribbon 210 is better passivated, and can be stored for a long time to avoid contact with the lithium ribbon. The air reacts.

Example 2

With reference to Fig. 1, turn on the switch of rolling device 160, utilize the parameter regulator in the rolling device 160 to set pressure controller 211 to be adjusted to 0.6MPa, speed controller 212 to be adjusted to 15m/min, gap regulator 213 to 0.04mm, and use The small piece of lithium ribbon 210, the first base material 220 and the second base material 230 carry out a pre-test machine on the rollers of the rolling device 160; after fine-tuning the speed, gap, and pressure to obtain the desired thickness of the lithium ribbon 210, which requires 5 μm, turn off the power .

The unwinding roller 111 of the lithium ribbon unwinding device 110, the lithium ribbon speed control roller 112, the lithium ribbon tension control roller tension control roller 113 walk through the lithium ribbon 210, and simultaneously the first unwinding roller 121 of the first unwinding device 120 , the first speed control roller 122, the first tension control roller 123 walk through the first base material 220, and the unwinding roller 131, the speed control roller 132, the tension control roller 133 of the second unwinding device 130 walk through the second base material Material 230. Afterwards, the lithium strip 210, the first substrate 220 and the second substrate 230 are passed through the rectifier 141, and the lithium strip 210, the first substrate 220 and the second substrate 230 are passed through the rollers of the rolling device 160 slit; the stripped second substrate 230 passes through the conveying roller 311, the stripping speed control roller 312, the stripping tension control roller 313, and reaches the stripping winding roller 314; The belt 210 reaches the subsequent take-up roll 333 through threading, and finally the unrolled lithium belt 210 containing the single-layer first substrate 220 is fixed on the take-up roll 333 .

Adjust the air pressure of the inert gas to 0.5MPa, adjust the parameters of the rolling device 160 back to the state of the previous debugging, and adjust the speed control rolls 112, 122, 132, 312, 331 and work rolls 216 to 15m/min, and The tension correction control rollers 113, 123, 133, 313, 332 are adjusted to 5N/m. At this point, press the start button of the lithium strip production equipment 100, the required 10 μm lithium strip can be obtained by rolling, and the surface of the lithium strip 210 is better passivated, can be stored for a long time, and can avoid contact with air. react.

Fig. 3 is a schematic flow chart of a lithium strip production method in an embodiment of the present invention. In an embodiment, the lithium ribbon production method can be implemented by using the above lithium ribbon production equipment 100 . As shown in Figure 3, lithium ribbon production methods include:

S100, material selection: remove lithium strips with surface defects, and select qualified lithium strips to be rolled;

S200, pre-passivation: place the lithium strip to be rolled in a drying room, spray passivation gas on the exposed surface of the lithium strip to be rolled to perform passivation treatment, and the passivation time is 5-20 hours ;

S300, surface treatment: respectively perform surface treatment on the surfaces of the first substrate and the second substrate that are in contact with the lithium ribbon to be rolled so that the first substrate and the lithium ribbon to be rolled The adsorption force between is greater than the adsorption force between the second substrate and the lithium strip to be rolled;

S400, roll pressing: place the lithium strip to be rolled, the first base material and the second base material in layers and perform roll pressing, so that the three are pressed together, wherein the lithium strip to be rolled is placed on the first Between a base material and a second base material, and the two sides of the lithium strip to be rolled are respectively completely covered by the first base material and the second base material;

S500, peeling: peeling the second base material from the lithium strip, the first base material, and the second base material pressed together by the rolling device;

S600, passivation: performing passivation treatment on the surface of the qualified lithium strip to be rolled;

S700, winding: winding the lithium ribbon containing the first base material.

Among them, the material selection step in S100 may specifically include: observing the surface of the lithium ribbon with a microscope or a magnifying glass, and removing lithium ribbons containing impurities and air bubbles, thereby selecting qualified lithium ribbons to be rolled.

In an embodiment, the thickness range of the lithium ribbon in S100 may be 30-1000 μm, that is, the qualified lithium ribbon to be rolled may have a thickness range of 30-1000 μm.

Step S200 can make the overall hardness of the lithium ribbon reach the required hardness, and the lithium ribbon to be rolled can be oxidized before rolling, so that it can be stored for a long time. In one embodiment, the qualified roll-pressed lithium strip to be rolled can be placed in a passivation box in a drying room for passivation treatment. The preferred passivation time is 5-8 hours. If the passivation time is short, the surface of the lithium strip after rolling is prone to oxidation, and if the passivation time is long, the production capacity of the equipment may be affected.

In S300, the first substrate and the second substrate may be one or a combination of polymer membranes, metal membranes and inorganic material membranes. In one embodiment, the thickness of the first substrate and the second substrate may be between 1-3000 μm. The first base material and the second base material can respectively use Teflon, polyethylene, polypropylene, polyurethane, polytetrafluoroethylene, polyaryl sulfone, polyethylene terephthalate, acrylonitrile-butadiene- Made of one or more combinations of styrene copolymer, polyimide, polyethersulfone, copper foil, aluminum foil, non-woven fabric, glassine paper or fiber paper. And preferably acrylonitrile-butadiene-styrene copolymer, polyimide, polyethylene terephthalate, its material has larger tensile strength and better elastic deformation, for the lithium to be rolled The belt can play a better buffer and protection role.

In S300, performing surface treatment on the surfaces of the first substrate and the second substrate in contact with the lithium strip to be rolled specifically includes:

Coating octadecane, hexadecane, cyclohexane, kerosene, simethicone, edible oil, dimethyl carbonate on the surface of the first substrate and the second substrate in contact with the lithium strip to be rolled , trifluoropropylmethylcyclotrisiloxane, dichloroethane, hexamethyldisiloxane, cyclopentasiloxane and other materials, so that the first substrate The roughness of the surface in contact with the lithium ribbon to be rolled is smaller than the roughness of the surface in contact with the lithium ribbon to be rolled on the second substrate, so that the distance between the first substrate and the lithium ribbon to be rolled is The adsorption force is greater than the adsorption force between the second substrate and the lithium ribbon to be rolled. In this way, during the process of peeling off the second substrate in S500, the first substrate can be attached to the lithium tape, and the second substrate can be peeled off from the lithium tape without sticking to the lithium tape. Among them, the preferred material is simethicone oil and cyclopentasiloxane, which can form a dense separation layer on the surface of the first substrate and the second substrate to ensure that the calendered lithium strip can be peeled off better. At the same time, the material can form different surface adhesion on the surface of the substrate.

Before performing S400, the motion parameters such as heating temperature, pressure, gap and speed of the rolling device can be adjusted in advance;

The heating temperature range is less than 120° C., and if the heating temperature is too high, the deformation of the first base material and the second base material is likely to occur, which further leads to wrinkling and damage of the first base material and the second base material during the rolling process. Moreover, the temperature should not be lower than 85°C. If the heating temperature is too low, the lithium strip to be rolled may not be able to produce good extension and fail to meet the expected thickness requirements.

The pressure, speed and gap of the working rolls can be adjusted according to the thickness of the lithium strip required. Wherein, the pressure of the work roll can be adjusted between 0.2～1.5MPa, the pressure of the work roll is preferably in the range of 0.4-1.0MPa, the pressure of the work roll is too large, it is easy to cause the first base material and the second base material to be crushed, and then As a result, there is a fire risk during the rolling process of the lithium strip to be rolled; and if the pressure of the working roll is too small, the lithium strip to be rolled may not meet the expected thickness requirements during the rolling process. The speed of the work roll can be adjusted between 0.001-60m/min, preferably the work roll speed is 1-30m/min, if the work roll speed is too fast, it will lead to unexpected failures in the rolling process of the lithium strip to be rolled. Thickness requirements; if the working roll speed is too slow, it will cause the lithium strip to be rolled to fail to meet the production capacity requirements during the rolling process. The gap between the work rolls can be adjusted between 0-5mm. Among them, the preferred work roll gap is 0.01-0.5 mm, if the work roll gap is too small, it is easy to cause the first base material and the second base material to be crushed during the rolling process, thereby causing the lithium to be rolled There is a fire risk during the rolling process of the belt; the working roll gap is too large, and the lithium belt to be rolled cannot meet the expected thickness requirement during the rolling process.

In the actual production process, the two working rolls can be rolled at a constant speed or at a differential speed.

When the two work rolls adopt constant speed rolling, the speed of the two work rolls is the same, which can be 0.001-60m/min, preferably 0.1-30m/min.

When the two work rolls adopt differential speed rolling, the speed ratio of the slow work roll and the fast work roll of the two work rolls is between 0.3%-100%, and the preferred speed ratio is 5%-30 %, if the speed ratio of the two working rolls is too small, it may cause discontinuous appearance of the lithium strip to be rolled during the rolling process; The lithium ribbon cannot meet the expected thickness requirements during the rolling process. Through the matching of different speeds between the two rollers, it can be ensured that the amount of lithium consumed when the lithium belt is fed will not increase with the increase of the speed, and the production efficiency can be ensured at the same time.

The role of S600 is to form a passivation film on the exposed surface of the lithium ribbon after the second substrate is peeled off. In this way, the rolled lithium ribbon can be quickly passivated after the second substrate is peeled off, thereby preventing the lithium ribbon from contacting with the lithium ribbon. air reaction. In an embodiment, the passivation time in S600 may be 5-180s.

In one embodiment, all the steps can be carried out under the condition of ambient temperature of 10-35° C. and humidity of 0-20%, so as to facilitate the rolling operation of the lithium ribbon.

Through the above-mentioned lithium ribbon production method, non-stick rollers and continuous ribbons can be produced. The thickness range of the lithium ribbon can be between 1-20 μm, which is suitable for the thickness of various ultra-thin lithium batteries, so as to meet the needs of battery companies; Moreover, the production process has less environmental pollution, and there is no potential safety hazard.

The following is a specific example to illustrate the lithium strip production method.

Example 3

Use a low-power microscope to observe the incoming 45μm thick lithium strip, remove the parts containing impurities on the surface, and then place the qualified lithium strip to be rolled in an environment with an ambient temperature of 30°C and a humidity of 10% for passivation treatment. Time 8h. Through passivation treatment, the lithium ribbon can achieve uniform softness and hardness. Prepare a first base material and a second base material with a length of 500 mm and a width of 75 mm, and coat the surfaces of the first base material and the second base material with simethicone oil. Wherein, the material of the first base material is polyethylene, the material of the second base material is glassine paper, the work roll is heated to make the temperature of the work roll reach 80°C, and the speed of the first work roll is adjusted to 3m/min , adjust the speed of the second work roll to 30m/min, adjust the gap between the two work rolls to 5μm, and control the air pressure to 0.6MPa. Place the passivated lithium strip with a length of 32mm and a width of 70mm between the first substrate and the second substrate and send it to the roller of the rolling mill to complete the rolling process, and a lithium strip of 5 μm can be obtained. The first substrate and the lithium The adhesion between the ribbons was 0.12N, and the adhesion between the second substrate and the lithium ribbon was 0.038N.

Example 4

Use a low-power microscope to observe the 100 μm thick lithium ribbon of the incoming material, remove the parts containing impurities on the surface, and then place the qualified lithium ribbon in an environment with an ambient temperature of 25°C and a humidity of 2% for passivation treatment, and the passivation time is 4h. Through passivation treatment, the lithium ribbon can achieve uniform softness and hardness. Prepare the first base material and the second base material made of two polyimide polymer materials with a length of 500 mm and a width of 75 mm, and coat the surfaces of the first base material and the second base material with cyclohexane. Heat the work rolls so that the temperature of the work rolls reaches 80°C, adjust the speed of the first work roll to 3m/min, adjust the speed of the second work roll to 3m/min, and adjust the gap between the two work rolls 3μm, air pressure control is 0.65MPa. A passivated lithium strip with a length of 32mm and a width of 70mm is placed between the first substrate and the second substrate and sent to the rolling mill to complete the rolling process, and a lithium strip of 3 μm can be obtained. The first substrate The adhesion to the lithium ribbon is 0.08N, and the adhesion between the second substrate and the lithium ribbon is 0.051N.

Example 5

Use a low-power microscope to observe the incoming 45μm thick lithium strip, remove the parts containing impurities on the surface, and then place the qualified lithium strip to be rolled in an environment with an ambient temperature of 30°C and a humidity of 10% for passivation treatment. Time 8h. Through passivation treatment, the lithium ribbon can achieve uniform softness and hardness. Prepare a first base material and a second base material with a length of 500 mm and a width of 75 mm, and coat surface materials on the surfaces of the first base material and the second base material. Wherein, the material of the first substrate is acrylonitrile-butadiene-styrene copolymer, and the coated surface material is dimethyl silicone oil; the material of the second substrate is polyethylene terephthalate, The surface material applied is acrylic polysiloxane. Heat the work rolls so that the temperature of the work rolls reaches 85°C, adjust the speed of the first work roll to 5m/min, adjust the speed of the second work roll to 5m/min, adjust the gap between the two work rolls 10μm, air pressure control is 0.6MPa. Place the passivated lithium strip with a length of 32mm and a width of 70mm between the first substrate and the second substrate and send it to the roller of the rolling mill to complete the rolling process, and a 10μm lithium strip can be obtained. The first substrate and the lithium The adhesion between the ribbons was 0.15N, and the adhesion between the second substrate and the lithium ribbon was 0.045N.

Example 6

Use a low-power microscope to observe the incoming 250μm thick lithium ribbon, remove the parts containing impurities on the surface, and then place the qualified lithium ribbon in an environment with an ambient temperature of 27°C and a humidity of 1% for passivation treatment, and the passivation time is 4h. Through passivation treatment, the lithium ribbon can achieve uniform softness and hardness. Prepare the first substrate and the second substrate made of two pieces of glassine paper with a length of 500 mm and a width of 75 mm, and coat the surfaces of the first substrate and the second substrate with hexamethyldisiloxane. Heat the work rolls so that the temperature of the work rolls reaches 35°C, adjust the speed of the slow work rolls to 10m/min, and adjust the speed of the fast work rolls to 10m/min, adjust the gap between the two work rolls The adjustment is 20μm, and the air pressure is controlled at 0.45MPa. Place the passivated lithium strip with a length of 32mm and a width of 70mm between the first substrate and the second substrate and send it to the work roll to complete the rolling process, and a 20μm lithium strip can be obtained. The first substrate The adhesion between the second substrate and the lithium tape is 0.07N, and the adhesion between the second substrate and the lithium tape is 0.055N.

Example 7

Use a low-power microscope to observe the incoming 250μm thick lithium ribbon, remove the parts containing impurities on the surface, and then place the qualified lithium ribbon in an environment with an ambient temperature of 27°C and a humidity of 1% for passivation treatment, and the passivation time is 4h. Through passivation treatment, the lithium ribbon can achieve uniform softness and hardness. Prepare the first base material and the second base material made of two polyethylene terephthalates with a length of 500 mm and a width of 75 mm, and coat the surface of the first base material with simethicone, and the second base material The substrate surface is coated with octadecane. Heat the work rolls so that the temperature of the work rolls reaches 48°C, adjust the speed of the slow work rolls to 1.5m/min, and adjust the speed of the fast work rolls to 20m/min, and adjust the speed between the two work rolls The gap is adjusted to 15μm, and the air pressure is controlled to 0.45MPa. Put the passivated lithium strip with a length of 32mm and a width of 70mm between the first substrate and the second substrate and send it to the work roll to complete the rolling process, and a lithium strip of 15 μm can be obtained. The first substrate The adhesion between the second substrate and the lithium tape is 0.085N, and the adhesion between the second substrate and the lithium tape is 0.032N.

Example 8

Use a low-power microscope to observe the 100 μm thick lithium ribbon of the incoming material, remove the parts containing impurities on the surface, and then place the qualified lithium ribbon in an environment with an ambient temperature of 25°C and a humidity of 2% for passivation treatment, and the passivation time is 4h. Through passivation treatment, the lithium ribbon can achieve uniform softness and hardness. Prepare a first base material and a second base material with a length of 500 mm and a width of 75 mm, and coat surface materials on the surfaces of the first base material and the second base material. Wherein, the material of the first substrate is polyurethane, and the coated surface material is hexadecane; the material of the second substrate is polyethersulfone, and the coated surface material is cyclopentasiloxane. Heat the work rolls so that the temperature of the work rolls reaches 60°C, adjust the speed of the slow work rolls to 3m/min, and adjust the speed of the fast work rolls to 30m/min, adjust the gap between the two work rolls The adjustment is 15μm, and the air pressure is controlled at 0.2MPa. Put the passivated lithium strip with a length of 32mm and a width of 70mm between the first substrate and the second substrate and send it to the work roll to complete the rolling process, and a lithium strip of 15 μm can be obtained. The first substrate The adhesion to the lithium ribbon is 0.09N, and the adhesion between the second substrate and the lithium ribbon is 0.043N.

Example 9

Use a low-power microscope to observe the 100 μm thick lithium ribbon of the incoming material, remove the parts containing impurities on the surface, and then place the qualified lithium ribbon in an environment with an ambient temperature of 25°C and a humidity of 2% for passivation treatment, and the passivation time is 4h. Through passivation treatment, the lithium ribbon can achieve uniform softness and hardness. Prepare a first base material and a second base material with a length of 500 mm and a width of 75 mm, and coat surface materials on the surfaces of the first base material and the second base material. Wherein, the material of the first substrate is polyethylene terephthalate, and the coated surface material is hexadecane; the material of the second substrate is glassine paper, and the coated surface material is dimethyl base silicone oil. Heat the work rolls so that the temperature of the work rolls reaches 90°C, adjust the speed of the slow work rolls to 15m/min, and adjust the speed of the fast work rolls to 60m/min, adjust the gap between the two work rolls The adjustment is 15μm, and the air pressure is controlled at 0.8MPa. Put the passivated lithium strip with a length of 32mm and a width of 70mm between the first substrate and the second substrate and send it to the work roll to complete the rolling process, and a lithium strip of 15 μm can be obtained. The first substrate The adhesive force between the second substrate and the lithium ribbon is 0.093N, and the adhesive force between the second substrate and the lithium ribbon is 0.042N.

Example 10

Use a low-power microscope to observe the incoming 250μm thick lithium ribbon, remove the parts containing impurities on the surface, and then place the qualified lithium ribbon in an environment with an ambient temperature of 27°C and a humidity of 1% for passivation treatment, and the passivation time is 4h. Through passivation treatment, the lithium ribbon can achieve uniform softness and hardness. Prepare a first base material and a second base material with a length of 500 mm and a width of 75 mm, and coat surface materials on the surfaces of the first base material and the second base material. Among them, the material of the first substrate is glassine paper, and the surface material coated is simethicone; the material of the second substrate is polyethylene terephthalate, and the surface material coated is acrylic acid polysiloxane. Heat the work rolls so that the temperature of the work rolls reaches 100°C, adjust the speed of the slow work rolls to 0.001m/min, and adjust the speed of the fast work rolls to 3m/min, and adjust the speed between the two work rolls The gap is adjusted to 10 μm, and the air pressure is controlled to 1.0 MPa. Place the passivated lithium strip with a length of 32mm and a width of 70mm between the first substrate and the second substrate and send it to the work roll to complete the rolling process, and a 10μm lithium strip can be obtained. The first substrate The adhesion to the lithium ribbon is 0.082N, and the adhesion between the second substrate and the lithium ribbon is 0.063N.

Example 11

Use a low-power microscope to observe the 100 μm thick lithium ribbon of the incoming material, remove the parts containing impurities on the surface, and then place the qualified lithium ribbon in an environment with an ambient temperature of 25°C and a humidity of 2% for passivation treatment, and the passivation time is 4h. Through passivation treatment, the lithium ribbon can achieve uniform softness and hardness. Prepare a first base material and a second base material with a length of 500 mm and a width of 75 mm, and coat surface materials on the surfaces of the first base material and the second base material. Wherein, the material of the first substrate is polyimide, and the coated surface material is cyclohexane; the material of the second substrate is polyethylene terephthalate, and the coated surface material is six Methyldisiloxane. Heat the work rolls so that the temperature of the work rolls reaches 110°C, adjust the speed of the first work roll to 0.01m/min, adjust the speed of the second work roll to 5m/min, the gap between the two work rolls The adjustment is 7μm, and the air pressure is controlled at 1.5MPa. Place the passivated lithium strip with a length of 32mm and a width of 70mm between the first substrate and the second substrate and send it to the roller of the rolling mill to complete the rolling process, and a lithium strip of 7 μm can be obtained. The first substrate The adhesion to the lithium ribbon is 0.11N, and the adhesion between the second substrate and the lithium ribbon is 0.071N.

In the above embodiments, the lithium ribbon may be a lithium metal ribbon or a lithium metal alloy ribbon.

The thickness of the lithium strips made in Example 3-11 is all within 20 μm, and there is generally a gap of about 1-3 times in the adhesion between the first substrate and the second substrate, and the peeling process of the second substrate will will be very smooth.

In summary, the lithium strip production equipment 100 and the lithium strip production method in the embodiment of the present invention can have the following beneficial effects:

1) The lithium strip production equipment and method in the embodiment of the present utility model can select a suitable first substrate and a second substrate according to the process requirements, and can realize continuous production of 1-20 μm lithium strip without sticking rolls and broken strips phenomenon, convenient operation, simple and wide practicability;

2) The lithium strip production method in the embodiment of the utility model carries out surface treatment such as coating octadecane etc. to the surface of the first base material and the second base material, so that the surface of the first base material and the second base material can be rolled Different lubricating effects can be achieved during the pressing process, and at the same time, it can ensure that the rolled out lithium strip can be well peeled off from the second substrate and ensure that the rolled out lithium strip is attached to the first substrate;

3) The lithium strip production method in the embodiment of the present invention integrates the rolling process and the surface treatment of the first base material and the second base material surface, such as coating octadecane, that is, the lubrication process, so that the material can be compared The thick lithium strip is rolled together with the first substrate and the second substrate, and then passivation treatment is performed on the exposed surface of the lithium strip after the second substrate is peeled off, so as to form a passivation film on the surface of the lithium strip to prevent The lithium ribbon reacts with the air, and the rolled lithium ribbon can be directly wound in the air;

3) The lithium strip production method in the embodiment of the utility model adjusts the speed of the two work rolls, so that the matching of different speeds is realized between the two work rolls, and the base material on one side is such as the first base material or the second base material Feeding is slow, which can effectively reduce the use cost of the substrate; through the matching of different speeds between the two work rolls, it can be ensured that the amount of lithium consumed by the lithium belt will not increase with the increase in speed, and at the same time it can be ensured Productivity.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (10)

1. A lithium ribbon production equipment, characterized in that, comprises rollers that are arranged successively on the advancing direction of the lithium ribbon and are used to roll and bond the first base material, lithium ribbon, and second base material that are stacked in sequence Pressing device, a peeling device for peeling off the second base material bonded with the lithium tape. 2. lithium ribbon production equipment according to claim 1, is characterized in that, before described rolling device, also be provided with the lithium ribbon unwinding device that is used to convey lithium ribbon to described rolling device, The lithium ribbon unwinding device comprises a lithium ribbon unwinding roller, a lithium ribbon magnetic powder controller, a lithium ribbon speed test roll and a lithium ribbon tension control roller; the lithium ribbon magnetic powder controller is placed on the side of the lithium ribbon unwinding roller, To control the lithium ribbon unwinding speed in the lithium ribbon unwinding device; the lithium ribbon speed test roller is arranged between the lithium ribbon unwinding roller and the lithium ribbon tension control roller. 3. The lithium ribbon production equipment according to claim 1, wherein a first unwinding device for transporting the first base material to the rolling device is also provided before the rolling device of the lithium ribbon , The first unwinding device includes a first unwinding roller, a first magnetic powder controller, a first speed test roller, a first tension control roller and a first traction roller; in the first unwinding device, the first An unwinding roller unwinds the first base material under the control of the first magnetic powder controller, the first speed test roller is arranged between the first unwinding roller and the first tension control roller, and the first A pulling roller is arranged in front of the entrance of the rolling device for pulling the first base material into the rolling device. 4. The lithium ribbon production equipment according to claim 1, wherein a second unwinding device for conveying a second base material to the rolling device is also provided before the rolling device of the lithium ribbon , the first unwinding device and the second unwinding device are respectively located on both sides of the lithium ribbon unwinding device, The second unwinding device includes a second unwinding roller, a second magnetic powder controller, a second speed test roller, a second tension control roller and a second traction roller; in the second unwinding device, the first The second unwinding roller unwinds the second substrate under the control of the second magnetic powder controller, the second speed test roller is arranged between the second unwinding roller and the second tension control roller, and the first Two pulling rollers are arranged in front of the entrance of the rolling device for pulling the second base material into the rolling device. 5. The lithium ribbon production equipment according to claim 4, characterized in that, a deviation corrector is also arranged between the entrance of the rolling device and the first traction roller and the second traction roller, and the first traction roller A traction roller and the second traction roller are respectively located on both sides of the deviation corrector, and are adjacent to the deviation corrector and the lithium belt. 6. The lithium ribbon production equipment according to claim 1, wherein the rolling device comprises a cylinder, a load plate, work rolls, a pressure controller, a speed controller, a gap controller and a gap adjustment mechanism; the cylinder accommodates the carrier plate and the work roll; The bearing plate includes a first bearing plate and a second bearing plate arranged at intervals; the first bearing plate and the second bearing plate are slidably arranged in the cylinder; The work rolls include first work rolls and second work rolls arranged at intervals; the first work rolls and the second work rolls are respectively arranged on the first bearing plate and the second bearing plate; The pressure controller controls the pressure of the first work roll and the second work roll on the feed lithium strip; the speed controller controls the speed of the first work roll and the second work roll to the feed lithium ribbon; the gap controller controls a gap between the first work roll and the second work roll; The gap adjustment mechanism adjusts a gap between the first work roll and the second work roll. 7. The lithium strip production equipment according to claim 6, wherein the rolling device further comprises a built-in deviation corrector arranged in the cylinder, and the built-in deviation corrector is located between the first work roll and the between the gap between the second work rolls and the stripping device. 8. The lithium ribbon production equipment according to claim 1, wherein the stripping device comprises a conveying roller, a deviation correction control roller, a speed test roller and a winding roller; In the film stripping device, the conveying roller, the film stripping correction control roller, the film stripping speed test roller and the film stripping winding roller are vertically spaced apart, and the conveying roller and The lithium strips are adjacent. 9. The lithium strip production equipment according to claim 1, further comprising a passivation device for passivating the exposed surface of the stripped lithium strip. 10. The lithium ribbon production equipment according to claim 9, characterized in that a winding device is also provided after the passivation device, The winding device includes a winding speed control roller, a winding deviation correction control roller and a winding roller; in the winding device, the deviation correction control roller is arranged between the speed control roller and the winding roller .