阅读说明：本技术 一种锂电池硅基薄膜负极片制备装置 (Lithium cell silicon-based film negative plate preparation facilities ) 是由 洪木南 李可心 刘波 于 2021-10-29 设计创作，主要内容包括：本发明涉及锂电池领域,尤其涉及一种锂电池硅基薄膜负极片制备装置。要解决的问题是：铜箔在涂覆硅基浆料时,上表面的多余硅基浆料无法通过重力作用自然下坠,导致铜箔上表面会堆积部分硅基浆料,干燥后铜箔表面硅基薄膜不平整,影响使用。技术方案是：一种锂电池硅基薄膜负极片制备装置,包括有第一安装板和传输单元等；第一安装板上侧连接有传输单元,传输单元用于配合传输铜箔,让铜箔平稳地转移。本发明实现了对锂电池硅基薄膜负极片的制备,将硅基浆料均匀地涂覆在铜箔表面,避免铜箔表面硅基浆料的聚集,导致铜箔表面硅基薄膜不平整的现象发生。(The invention relates to the field of lithium batteries, in particular to a preparation device for a silicon-based thin film negative plate of a lithium battery. The problems to be solved are that: when the copper foil is coated with the silicon-based slurry, the redundant silicon-based slurry on the upper surface cannot naturally fall down under the action of gravity, so that part of the silicon-based slurry can be accumulated on the upper surface of the copper foil, and the silicon-based film on the surface of the dried copper foil is uneven, thereby influencing the use. The technical scheme is as follows: a lithium battery silicon-based film negative plate preparation device comprises a first mounting plate, a transmission unit and the like; the transmission unit is connected with first mounting panel upside, and the transmission unit is used for the cooperation to transmit the copper foil, lets the copper foil shift steadily. The preparation method realizes the preparation of the lithium battery silicon-based film negative plate, uniformly coats the silicon-based slurry on the surface of the copper foil, and avoids the phenomenon that the silicon-based film on the surface of the copper foil is uneven due to the aggregation of the silicon-based slurry on the surface of the copper foil.)

1. A lithium battery silicon-based film negative plate preparation device comprises a footing (1) and a first mounting plate (2); the tops of the six bottom feet (1) are connected with a first mounting plate (2); the device is characterized by also comprising a transmission unit, a leveling unit and a drying unit; the upper side of the first mounting plate (2) is connected with a transmission unit which is used for transmitting copper foil in a matched manner so as to enable the copper foil to be transferred stably; the left part of the upper side of the first mounting plate (2) is connected with a leveling unit, and the leveling unit is used for removing redundant silicon-based slurry on the upper surface and the lower surface of the copper foil and leveling the silicon-based slurry; the middle part of the upper side of the first mounting plate (2) is connected with a drying unit, and the drying unit is used for drying silicon-based slurry on the upper surface and the lower surface of the copper foil.

2. The device for preparing the negative electrode sheet of the silicon-based thin film of the lithium battery as claimed in claim 1, wherein the transmission unit comprises a first mounting frame (301), a second mounting frame (302), a third mounting frame (303), a fourth mounting frame (304), a first electric guide roller (305), a second electric guide roller (306), a third electric guide roller (307), a fourth electric guide roller (308), a fifth electric guide roller (309) and a ninth electric guide roller (3010); two first mounting frames (301) which are symmetrically arranged are fixedly connected to the left part of the upper side of the first mounting plate (2), and the two first mounting frames (301) are positioned on the left side of the leveling unit; the middle part of the upper side of the first mounting plate (2) is fixedly connected with a second mounting frame (302), and the second mounting frame (302) is positioned on the right side of the drying unit; a third mounting rack (303) and two fourth mounting racks (304) are fixedly connected to the right part of the upper side of the first mounting plate (2), and the two fourth mounting racks (304) are respectively positioned on the right sides of the two third mounting racks (303); a second electric guide roller (306) and a third electric guide roller (307) are arranged at the upper parts of the two first mounting frames (301), and the second electric guide roller (306) is positioned above the third electric guide roller (307); a ninth electric guide roller (3010) is arranged at the upper part of the second mounting rack (302); a first electric guide roller (305) is arranged at the upper part of the third mounting rack (303); a fourth electric guide roller (308) and a fifth electric guide roller (309) are installed at the upper parts of the two fourth mounting frames (304), and the fourth electric guide roller (308) is positioned above the fifth electric guide roller (309).

3. The device for preparing the silicon-based thin film negative plate of the lithium battery as claimed in claim 2, wherein the coating unit comprises a slurry pool (401), a second mounting plate (402), a coating plate (4010), a sixth electric guide roller (4017), a seventh electric guide roller (4018), an eighth electric guide roller (4019), a tenth mounting plate (4020) and a coating assembly; the left part of the upper side of the first mounting plate (2) is fixedly connected with a slurry pool (401), the slurry pool (401) is positioned on the right of the two first mounting frames (301), the slurry pool (401) is positioned on the left of the drying unit, and the slurry pool (401) is used for storing silicon-based slurry; the right part of the upper side of the slurry pool (401) is fixedly connected with two tenth mounting plates (4020) which are symmetrically arranged; the upper side of the slurry pool (401) is positioned on the left of the two tenth mounting plates (4020) and is connected with two symmetrically arranged leveling assemblies; the tops of the two tenth mounting plates (4020) are fixedly connected with a second mounting plate (402); the right parts of the two leveling assemblies are connected with a second mounting plate (402); a seventh electric guide roller (4018) and an eighth electric guide roller (4019) are installed at the left part in the slurry tank (401), and the seventh electric guide roller (4018) is positioned above the eighth electric guide roller (4019); a coating plate (4010) is connected below the two coating assemblies; and a sixth electric guide roller (4017) is arranged between the two tenth mounting plates (4020).

4. The device for preparing the lithium battery silicon-based thin film negative electrode plate as claimed in claim 3, wherein the rear coating component comprises a telescopic plate (403), a first L-shaped plate (404), a straight slide rail (405), a straight slide block (406), a second L-shaped plate (407), a first spring (408), a first wedge-shaped block (409), a second wedge-shaped block (4011), a third mounting plate (4012), a first electric slide rail (4013), a first electric slide block (4014), a fourth mounting plate (4015) and a first electric push rod (4016); a first L-shaped plate (404) is fixedly connected to the rear left part of the second mounting plate (402); a straight slide rail (405) is fixedly connected to the lower side of the first L-shaped plate (404); a first spring (408) is fixedly connected to the front part of the first L-shaped plate (404); a straight sliding block (406) is connected on the straight sliding rail (405) in a sliding way; the first spring (408) is fixedly connected with the straight sliding block (406); a second L-shaped plate (407) is fixedly connected to the lower side of the straight sliding block (406); the rear part of the lower side of the second L-shaped plate (407) is fixedly connected with a first wedge-shaped block (409); the front part of the second L-shaped plate (407) is fixedly connected with a telescopic plate (403); the rear part of the upper side of the slurry pool (401) is fixedly connected with a third mounting plate (4012); the front side of the third mounting plate (4012) is fixedly connected with an inclined first electric slide rail (4013); a first electric slide block (4014) is connected to the first electric slide rail (4013) in a sliding way; a fourth mounting plate (4015) is fixedly connected to the front side of the first electric slide block (4014); the upper side of the fourth mounting plate (4015) is fixedly connected with a second wedge-shaped block (4011); a first electric push rod (4016) is fixedly connected to the lower side of the fourth mounting plate (4015); the telescopic end of the first electric push rod (4016) is fixedly connected with the rear part of the coating plate (4010).

5. The device for preparing the silicon-based thin film negative plate of the lithium battery as claimed in claim 4, wherein the coating plate (4010) is arranged in an arch shape and is used for arching the middle part of the copper foil.

6. The device for preparing the lithium battery silicon-based thin film negative plate as claimed in claim 5, wherein the drying unit comprises a sixth mounting frame (501), a drying box (502) and a heating wire (503); the middle part of the upper side of the first mounting plate (2) is fixedly connected with two sixth mounting frames (501), and the two sixth mounting frames (501) are positioned on the left of the second mounting frame (302); the tops of the two sixth mounting racks (501) are fixedly connected with a drying box (502); the upper part and the lower part in the drying box (502) are respectively provided with an electric heating wire (503).

7. The device for preparing the silicon-based thin film negative plate of the lithium battery as claimed in claim 6, further comprising a lithium powder supplementing unit; the right part of the upper side of the first mounting plate (2) is connected with a lithium supplement unit, and the lithium supplement unit is connected with the transmission unit; the lithium supplement unit comprises a seventh mounting frame (601), a second spring (602), a fifth mounting plate (603), a first vibrating motor (604), an eighth mounting frame (605), a second electric slide rail (606), a second electric slide block (607), a baffle (608), a lithium powder box (609), a second electric push rod (6010), a first insulating block (6011), a first wire mesh fastening rod (6012), an insulating slide rail (6013), a second insulating block (6014), a straight plate electrode (6015), a third insulating block (6016), a second wire mesh fastening rod (6017), a third L-shaped block (6018), a wire mesh electrode (6019), a second vibrating motor (6020) and an eleventh mounting plate (6021); two seventh mounting frames (601) which are symmetrically arranged are fixedly connected to the right part of the upper side of the first mounting plate (2), the two seventh mounting frames (601) are positioned on the right of the two second mounting frames (302), and the two seventh mounting frames (601) are positioned on the left of the third mounting frame (303); the upper sides of the two seventh mounting frames (601) are respectively and fixedly connected with two second springs (602) which are symmetrically arranged; the upper ends of the two front second springs (602) are fixedly connected with a fifth mounting plate (603); a second vibrating motor (6020) is fixedly connected to the upper side of the fifth mounting plate (603), and a third insulating block (6016) is fixedly connected to the rear side of the fifth mounting plate (603); a second wire mesh fastening rod (6017) is fixedly connected to the rear side of the third insulating block (6016); the upper ends of the two second springs (602) at the rear are fixedly connected with eleventh mounting plates (6021); a first vibration motor (604) is fixedly connected to the upper side of the eleventh mounting plate (6021); a third L-shaped block (6018) is fixedly connected to the right side of the eleventh mounting plate (6021); an insulating slide rail (6013) is fixedly connected to the front side of the eleventh mounting plate (6021); a first wire mesh fastening rod (6012) is connected onto the insulating slide rail (6013) in a sliding mode; a wire mesh electrode (6019) is fixedly connected between the first wire mesh fastening rod (6012) and the second wire mesh fastening rod (6017); a screen electrode (6019) for uniformly scattering lithium powder on the upper surface of the copper foil; the front part of the third L-shaped block (6018) is fixedly connected with a second electric push rod (6010); the telescopic end of the second electric push rod (6010) is connected with a first wire mesh fastening rod (6012) through a first insulating block (6011); two eighth mounting racks (605) which are symmetrically arranged are fixedly connected to the upper side of the second mounting rack (302), and the right parts of the two eighth mounting racks (605) are fixedly connected to the upper side of the third mounting rack (303); a lithium powder box (609) is fixedly connected between the two eighth mounting frames (605); the middle parts of the opposite sides of the two eighth mounting racks (605) are respectively and fixedly connected with a second electric slide rail (606); two second electric sliding blocks (607) are respectively connected to the opposite sides of the two second electric sliding rails (606) in a sliding manner; the two second electric sliding blocks (607) are fixedly connected with a baffle (608) at the opposite sides, the baffle (608) is positioned above the screen electrode (6019), and the baffle (608) is in contact with the lower surface of the lithium powder box (609).

8. The device for preparing the lithium battery silicon-based film negative plate as claimed in claim 7, wherein the screen electrode (6019) is woven by conductive metal wires to facilitate mesh size adjustment.

9. The device for preparing the silicon-based thin film negative plate of the lithium battery as claimed in claim 8, further comprising a flattening unit; the upper right part of the first mounting plate (2) is connected with a leveling unit; the leveling unit comprises a fifth mounting frame (701), a sixth mounting plate (702), a main motor (703), a third spring (704), a transmission shaft (705), a long bump (706), a seventh mounting plate (707), an eighth mounting plate (708), a ninth mounting plate (709), an elastic membrane frame (7010) and a pressing block (7011); two symmetrically arranged fifth mounting frames (701) are fixedly connected to the right part of the upper side of the first mounting plate (2), the fifth mounting frames (701) are positioned on the right side of the third mounting frame (303), and the fifth mounting frames (701) are positioned on the left side of the two fourth mounting frames (304); the upper sides of the two fifth mounting racks (701) are fixedly connected with a sixth mounting plate (702); a main motor (703) is installed on the rear side of the sixth installation plate (702); the middle part of the sixth mounting plate (702) is rotatably connected with a transmission shaft (705); an eighth mounting plate (708) and a ninth mounting plate (709) are fixedly connected to the lower portion of the inner wall of the sixth mounting plate (702), and the eighth mounting plate (708) is located on the right of the ninth mounting plate (709); four corners of the top of the sixth mounting plate (702) are fixedly connected with a third spring (704) respectively; the lower ends of the four third springs (704) are fixedly connected with a seventh mounting plate (707); an output shaft of the main motor (703) is fixedly connected with a transmission shaft (705); a long lug (706) is fixedly connected to the outer surface of the transmission shaft (705), and the long lug (706) is positioned above the seventh mounting plate (707); eight elastic membrane frames (7010) are fixedly connected to the eighth mounting plate (708); the ninth mounting plate (709) is fixedly connected with nine elastic membrane frames (7010); nine pressing blocks (7011) are fixedly connected to the left portion of the lower side of the seventh mounting plate (707), eight pressing blocks (7011) are fixedly connected to the right portion of the lower side, and the pressing blocks (7011) correspond to the elastic membrane frames (7010) one to one.

10. The device for preparing the lithium battery silicon-based thin film negative plate as claimed in claim 9, wherein the elastic film frame (7010) fixedly connected to the eighth mounting plate (708) and the elastic film frame (7010) fixedly connected to the ninth mounting plate (709) are arranged in a staggered manner to flatten lithium powder accumulated on the upper surface of the copper foil; the lower part of the elastic membrane frame (7010) is provided with an arc elastic membrane which is used for forming air pressure to break up the accumulated lithium powder; the lower side of the pressing block (7011) is arranged to be arc-shaped and used for preventing the elastic film at the lower part of the elastic film frame (7010) from being punctured.

Technical Field

The invention relates to the field of lithium batteries, in particular to a preparation device for a silicon-based thin film negative plate of a lithium battery.

Background

At present, a silicon-based material is prepared into slurry, then the slurry is coated on a copper foil for drying, in the prior art, the copper foil is coated with the silicon-based slurry, the copper foil is conveyed by a winding machine, but the redundant silicon-based slurry on the upper surface of the copper foil cannot naturally fall down under the action of gravity during conveying, so that part of the silicon-based slurry can be accumulated on the upper surface of the copper foil, and the silicon-based film on the surface of the dried copper foil is uneven, so that the use is influenced;

in addition, for the negative plate, during the first charging process of the lithium battery, part of lithium is consumed due to the formation of the solid electrolyte membrane, so that lithium loss is caused, and the capacity of the lithium battery is reduced.

Disclosure of Invention

The invention provides a preparation device of a lithium battery silicon-based film negative plate, aiming at overcoming the defects that when a copper foil is coated with silicon-based slurry, redundant silicon-based slurry on the upper surface cannot naturally fall down under the action of gravity, so that part of the silicon-based slurry can be accumulated on the upper surface of the copper foil, and the silicon-based film on the surface of the copper foil is uneven after drying, so that the use is influenced.

The technical scheme is as follows: a lithium battery silicon-based film negative plate preparation device comprises a footing, a first mounting plate, a transmission unit, a leveling unit and a drying unit; the tops of the six bottom feet are connected with a first mounting plate; the upper side of the first mounting plate is connected with a transmission unit, and the transmission unit is used for matching with a transmission copper foil to enable the copper foil to be transferred stably; the left part of the upper side of the first mounting plate is connected with a leveling unit, and the leveling unit is used for removing redundant silicon-based slurry on the upper surface and the lower surface of the copper foil and leveling the silicon-based slurry; the middle part of the upper side of the first mounting plate is connected with a drying unit, and the drying unit is used for drying silicon-based slurry on the upper surface and the lower surface of the copper foil.

Further, the transmission unit comprises a first mounting frame, a second mounting frame, a third mounting frame, a fourth mounting frame, a first electric guide roller, a second electric guide roller, a third electric guide roller, a fourth electric guide roller, a fifth electric guide roller and a ninth electric guide roller; the left part of the upper side of the first mounting plate is fixedly connected with two first mounting frames which are symmetrically arranged, and the two first mounting frames are positioned on the left side of the leveling unit; the middle part of the upper side of the first mounting plate is fixedly connected with a second mounting frame, and the second mounting frame is positioned on the right side of the drying unit; the right part of the upper side of the first mounting plate is fixedly connected with a third mounting frame and two fourth mounting frames, and the two fourth mounting frames are respectively positioned on the right of the two third mounting frames; a second electric guide roller and a third electric guide roller are arranged at the upper parts of the two first mounting frames, and the second electric guide roller is positioned above the third electric guide roller; a ninth electric guide roller is arranged at the upper part of the second mounting frame; a first electric guide roller is arranged at the upper part of the third mounting frame; and a fourth electric guide roller and a fifth electric guide roller are installed on the upper parts of the two fourth mounting frames, and the fourth electric guide roller is positioned above the fifth electric guide roller.

Further, the leveling unit comprises a slurry tank, a second mounting plate, a coating plate, a sixth electric guide roller, a seventh electric guide roller, an eighth electric guide roller, a tenth mounting plate and a leveling assembly; the left part of the upper side of each first mounting plate is fixedly connected with a slurry pool, the slurry pools are positioned on the right sides of the two first mounting frames and are positioned on the left side of the drying unit, and the slurry pools are used for storing silicon-based slurry; the right part of the upper side of the slurry pool is fixedly connected with two tenth mounting plates which are symmetrically arranged; the upper side of the slurry pool is connected with two symmetrically arranged leveling components on the left of the two tenth mounting plates; the tops of the two tenth mounting plates are fixedly connected with a second mounting plate; the right parts of the two leveling components are connected with a second mounting plate; a seventh electric guide roller and an eighth electric guide roller are arranged at the left part in the slurry pool, and the seventh electric guide roller is positioned above the eighth electric guide roller; coating plates are connected below the two coating assemblies; and a sixth electric guide roller is arranged between the two tenth mounting plates.

Furthermore, the rear leveling component comprises a telescopic plate, a first L-shaped plate, a straight sliding rail, a straight sliding block, a second L-shaped plate, a first spring, a first wedge-shaped block, a second wedge-shaped block, a third mounting plate, a first electric sliding rail, a first electric sliding block, a fourth mounting plate and a first electric push rod; the rear left part of the second mounting plate is fixedly connected with a first L-shaped plate; a straight slide rail is fixedly connected to the lower side of the first L-shaped plate; the front part of the first L-shaped plate is fixedly connected with a first spring; the straight slide rail is connected with a straight slide block in a sliding way; the first spring is fixedly connected with the straight sliding block; the lower side of the straight sliding block is fixedly connected with a second L-shaped plate; the rear part of the lower side of the second L-shaped plate is fixedly connected with a first wedge-shaped block; the front part of the second L-shaped plate is fixedly connected with a telescopic plate; the rear part of the upper side of the slurry tank is fixedly connected with a third mounting plate; the front side of the third mounting plate is fixedly connected with an inclined first electric slide rail; the first electric slide rail is connected with a first electric slide block in a sliding manner; the front side of the first electric sliding block is fixedly connected with a fourth mounting plate; the upper side of the fourth mounting plate is fixedly connected with a second wedge-shaped block; a first electric push rod is fixedly connected to the lower side of the fourth mounting plate; the first electric push rod is fixedly connected with the rear part of the coating plate at the telescopic end.

Furthermore, the coating plate is arranged in an arch shape and is used for arching the middle part of the copper foil.

Further, the drying unit comprises a sixth mounting rack, a drying box and a heating wire; the middle part of the upper side of the first mounting plate is fixedly connected with two sixth mounting frames, and the two sixth mounting frames are positioned on the left of the second mounting frame; the tops of the two sixth mounting frames are fixedly connected with a drying box; the upper part and the lower part in the drying box are respectively provided with an electric heating wire.

Furthermore, the lithium ion battery also comprises a lithium supplement powder unit; the right part of the upper side of the first mounting plate is connected with a lithium supplement unit, and the lithium supplement unit is connected with the transmission unit; the lithium supplement powder unit comprises a seventh mounting frame, a second spring, a fifth mounting plate, a first vibrating motor, an eighth mounting frame, a second electric slide rail, a second electric slide block, a baffle plate, a lithium powder box, a second electric push rod, a first insulating block, a first wire mesh fastening rod, an insulating slide rail, a second insulating block, a straight plate electrode, a third insulating block, a second wire mesh fastening rod, a third L-shaped block, a wire mesh electrode, a second vibrating motor and an eleventh mounting plate; the right part of the upper side of the first mounting plate is fixedly connected with two symmetrically arranged seventh mounting frames, the two seventh mounting frames are positioned on the right of the two second mounting frames, and the two seventh mounting frames are positioned on the left of the third mounting frame; the upper sides of the two seventh mounting frames are respectively fixedly connected with two second springs which are symmetrically arranged; the upper ends of the two front second springs are fixedly connected with a fifth mounting plate; a second vibrating motor is fixedly connected to the upper side of the fifth mounting plate, and a third insulating block is fixedly connected to the rear side of the fifth mounting plate; a second wire mesh fastening rod is fixedly connected to the rear side of the third insulating block; the upper ends of the two second springs at the rear are fixedly connected with an eleventh mounting plate; the upper side of the eleventh mounting plate is fixedly connected with a first vibration motor; a third L-shaped block is fixedly connected to the right side of the eleventh mounting plate; an insulating slide rail is fixedly connected to the front side of the eleventh mounting plate; a first wire mesh fastening rod is connected to the insulating slide rail in a sliding manner; a wire mesh electrode is fixedly connected between the first wire mesh fastening rod and the second wire mesh fastening rod; the wire mesh electrode is used for uniformly scattering lithium powder on the upper surface of the copper foil; the front part of the third L-shaped block is fixedly connected with a second electric push rod; the telescopic end of the second electric push rod is connected with the first wire mesh fastening rod through the first insulating block; the upper side of the second mounting frame is fixedly connected with two symmetrically arranged eighth mounting frames, and the right parts of the two eighth mounting frames are fixedly connected with the upper side of the third mounting frame; a lithium powder box is fixedly connected between the two eighth mounting frames; the middle parts of the opposite sides of the two eighth mounting frames are respectively and fixedly connected with a second electric slide rail; two second electric sliding blocks are respectively connected to the opposite sides of the two second electric sliding rails in a sliding manner; two electronic sliders of second are to side fixedly connected with baffle to the baffle is located silk screen electrode top, and baffle and lithium powder case lower surface contact moreover.

Furthermore, the screen electrode is formed by weaving conductive metal wires, and the mesh size is favorably adjusted.

Furthermore, the device also comprises a leveling unit; the right part of the upper side of the first mounting plate is connected with a leveling unit; the leveling unit comprises a fifth mounting frame, a sixth mounting plate, a main motor, a third spring, a transmission shaft, a long bump, a seventh mounting plate, an eighth mounting plate, a ninth mounting plate, an elastic membrane frame and a pressing block; the right part of the upper side of the first mounting plate is fixedly connected with two symmetrically arranged fifth mounting frames, the fifth mounting frames are positioned on the right of the third mounting frames, and the fifth mounting frames are positioned on the left of the two fourth mounting frames; the upper sides of the two fifth mounting frames are fixedly connected with a sixth mounting plate; a main motor is arranged at the rear side of the sixth mounting plate; the middle part of the sixth mounting plate is rotatably connected with a transmission shaft; the lower part of the inner wall of the sixth mounting plate is fixedly connected with an eighth mounting plate and a ninth mounting plate, and the eighth mounting plate is positioned on the right of the ninth mounting plate; four corners of the top in the sixth mounting plate are respectively and fixedly connected with a third spring; the lower ends of the four third springs are fixedly connected with a seventh mounting plate; the output shaft of the main motor is fixedly connected with the transmission shaft; the outer surface of the transmission shaft is fixedly connected with a long lug, and the long lug is positioned above the seventh mounting plate; eight elastic membrane frames are fixedly connected to the eighth mounting plate; the ninth mounting plate is fixedly connected with the nine elastic membrane frames; nine briquetting of seventh mounting panel downside left part fixedly connected with, eight briquetting of downside right part fixedly connected to the briquetting and elastic membrane frame one-to-one.

Furthermore, the elastic film frames fixedly connected to the eighth mounting plate and the elastic film frames fixedly connected to the ninth mounting plate are arranged in a staggered manner and used for flattening lithium powder accumulated on the upper surface of the copper foil; the lower part of the elastic membrane frame is provided with an arc-shaped elastic membrane which is used for forming air pressure to break up the accumulated lithium powder; the lower side of the pressing block is arc-shaped and is used for preventing the elastic film at the lower part of the elastic film frame from being punctured.

Has the advantages that: the preparation method disclosed by the invention realizes the preparation of the lithium battery silicon-based film negative plate, the silicon-based slurry is uniformly coated on the surface of the copper foil, the phenomenon that the silicon-based film on the surface of the copper foil is not smooth due to the aggregation of the silicon-based slurry on the surface of the copper foil is avoided, the lithium is supplemented to the negative plate to prevent the capacity of the battery from being reduced, and the phenomenon that the lithium powder is accumulated to influence the use of the negative plate in the lithium supplementing process is avoided.

Drawings

FIG. 1 is a schematic view of a first structure of a lithium battery silicon-based thin film negative plate preparation device according to the present invention;

FIG. 2 is a top view of the lithium battery silicon-based thin film negative plate preparation device of the present invention;

FIG. 3 is a schematic diagram of a second structure of the lithium battery silicon-based thin film negative plate preparation device of the present invention;

FIG. 4 is a schematic view of a partial structure of a lithium battery silicon-based thin film negative plate preparation device according to the present invention;

FIG. 5 is a schematic view of a partial structure of a transmission unit of the lithium battery silicon-based thin film negative plate preparation device of the present invention;

FIG. 6 is a schematic structural diagram of a leveling unit of the lithium battery silicon-based thin film negative plate preparation device of the present invention;

FIG. 7 is a schematic view of a first partial structure of a leveling unit of the lithium battery silicon-based thin film negative electrode sheet preparation device according to the present invention;

FIG. 8 is a schematic view of a second partial structure of a leveling unit of the lithium battery silicon-based thin film negative electrode sheet preparation device according to the present invention;

FIG. 9 is a schematic structural diagram of a drying unit of the lithium battery silicon-based thin film negative plate preparation device of the present invention;

FIG. 10 is a schematic structural diagram of a lithium powder supplementing unit of the lithium battery silicon-based thin film negative plate preparation device of the present invention;

FIG. 11 is a partial structural cross-sectional view of a lithium powder supplementing unit of the lithium battery silicon-based thin film negative plate preparation device of the present invention;

FIG. 12 is a schematic diagram of a first partial structure of a lithium powder supplement unit of the lithium battery silicon-based thin film negative plate preparation device according to the present invention;

FIG. 13 is a schematic diagram of a second partial structure of a lithium powder supplement unit of the lithium battery silicon-based thin film negative plate preparation device according to the present invention;

FIG. 14 is a schematic structural diagram of a leveling unit of the lithium battery silicon-based thin film negative plate preparation device of the present invention;

FIG. 15 is a schematic view of a first partial structure of a leveling unit of the lithium battery silicon-based thin film negative electrode sheet preparation device according to the present invention;

FIG. 16 is a schematic diagram of a second partial structure of a leveling unit of the lithium battery silicon-based thin film negative electrode sheet preparation device according to the present invention;

fig. 17 is a schematic view of a third partial structure of a leveling unit of the lithium battery silicon-based thin film negative plate preparation device of the invention.

Labeled as: 1-footing, 2-first mounting plate, 301-first mounting plate, 302-second mounting plate, 303-third mounting plate, 304-fourth mounting plate, 305-first motorized guide roller, 306-second motorized guide roller, 307-third motorized guide roller, 308-fourth motorized guide roller, 309-fifth motorized guide roller, 3010-ninth motorized guide roller, 401-slurry tank, 402-second mounting plate, 403-expansion plate, 404-first L-shaped plate, 405-straight slide rail, 406-straight slide block, 407-second L-shaped plate, 408-first spring, 409-first wedge block, 4010-coating plate, 4011-second wedge block, 4012-third mounting plate, 4013-first motorized slide rail, 4014-first motorized slide block, 4015-fourth mounting plate, 4016-first electric push bar, 4017-sixth electric guide roller, 4018-seventh electric guide roller, 4019-eighth electric guide roller, 4020-tenth mounting plate, 501-sixth mounting frame, 502-drying box, 503-heating wire, 601-seventh mounting frame, 602-second spring, 603-fifth mounting plate, 604-first vibration motor, 605-eighth mounting frame, 606-second electric slide rail, 607-second electric slide block, 608-baffle, 609-lithium powder box, 6010-second electric push bar, 6011-first insulating block, 6012-first wire mesh fastening bar, 6013-insulating slide rail, 6014-second insulating block, 6015-straight plate electrode, 6016-third insulating block, 6017-second wire mesh fastening bar, 6018-third L-shaped block, 6019-wire mesh electrode, 6020-second vibrating motor, 6021-eleventh mounting plate, 701-fifth mounting frame, 702-sixth mounting plate, 703-main motor, 704-third spring, 705-transmission shaft, 706-long bump, 707-seventh mounting plate, 708-eighth mounting plate, 709-ninth mounting plate, 7010-elastic membrane frame, and 7011-pressing block.

Detailed Description

The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.

Example 1

A lithium battery silicon-based film negative plate preparation device is shown in figures 1-3 and comprises a footing 1, a first mounting plate 2, a transmission unit, a leveling unit and a drying unit; the tops of the six bottom feet 1 are connected with a first mounting plate 2; the upper side of the first mounting plate 2 is connected with a transmission unit; the left part of the upper side of the first mounting plate 2 is connected with a leveling unit; the middle part of the upper side of the first mounting plate 2 is connected with a drying unit.

The transmission unit comprises a first mounting frame 301, a second mounting frame 302, a third mounting frame 303, a fourth mounting frame 304, a first electric guide roller 305, a second electric guide roller 306, a third electric guide roller 307, a fourth electric guide roller 308, a fifth electric guide roller 309 and a ninth electric guide roller 3010; two first mounting brackets 301 which are symmetrically arranged are fixedly connected to the left part of the upper side of the first mounting plate 2, and the two first mounting brackets 301 are positioned on the left side of the leveling unit; the middle part of the upper side of the first mounting plate 2 is fixedly connected with a second mounting frame 302, and the second mounting frame 302 is positioned at the right side of the drying unit; a third mounting rack 303 and two fourth mounting racks 304 are fixedly connected to the right part of the upper side of the first mounting plate 2, and the two fourth mounting racks 304 are respectively positioned on the right of the two third mounting racks 303; a second electric guide roller 306 and a third electric guide roller 307 are arranged at the upper parts of the two first mounting frames 301, and the second electric guide roller 306 is positioned above the third electric guide roller 307; a ninth electric guide roller 3010 is installed on the upper part of the second mounting frame 302; a first electric guide roller 305 is arranged at the upper part of the third mounting rack 303; the fourth electric guide roller 308 and the fifth electric guide roller 309 are installed on the upper portions of the two fourth mounting brackets 304, and the fourth electric guide roller 308 is located above the fifth electric guide roller 309.

The leveling unit comprises a slurry pool 401, a second mounting plate 402, a leveling plate 4010, a sixth electric guide roller 4017, a seventh electric guide roller 4018, an eighth electric guide roller 4019, a tenth mounting plate 4020 and a leveling assembly; a slurry pool 401 is fixedly connected to the left part of the upper side of the first mounting plate 2, the slurry pool 401 is positioned on the right of the two first mounting frames 301, the slurry pool 401 is positioned on the left of the drying unit, and the slurry pool 401 is used for storing silicon-based slurry; the right part of the upper side of the slurry tank 401 is fixedly connected with two tenth mounting plates 4020 which are symmetrically arranged; two symmetrically arranged leveling assemblies are connected to the upper side of the slurry tank 401 at the left of the two tenth mounting plates 4020; the tops of the two tenth mounting plates 4020 are fixedly connected with a second mounting plate 402; the right portions of the two leveling assemblies are connected to a second mounting plate 402; a seventh motorized guide roller 4018 and an eighth motorized guide roller 4019 are installed at the left portion in the stock chest 401, and the seventh motorized guide roller 4018 is located above the eighth motorized guide roller 4019; a coating plate 4010 is connected below the two coating assemblies; a sixth motorized guide roller 4017 is mounted between the two tenth mounting plates 4020.

The rear leveling component comprises a telescopic plate 403, a first L-shaped plate 404, a straight sliding rail 405, a straight sliding block 406, a second L-shaped plate 407, a first spring 408, a first wedge-shaped block 409, a second wedge-shaped block 4011, a third installation plate 4012, a first electric sliding rail 4013, a first electric sliding block 4014, a fourth installation plate 4015 and a first electric push rod 4016; a first L-shaped plate 404 is fixedly connected to the rear left part of the second mounting plate 402; a straight slide rail 405 is fixedly connected to the lower side of the first L-shaped plate 404; a first spring 408 is fixedly connected to the front part of the first L-shaped plate 404; a straight slide block 406 is connected on the straight slide rail 405 in a sliding manner; the first spring 408 is fixedly connected with the straight sliding block 406; a second L-shaped plate 407 is fixedly connected to the lower side of the straight sliding block 406; the rear part of the lower side of the second L-shaped plate 407 is fixedly connected with a first wedge-shaped block 409; the front part of the second L-shaped plate 407 is fixedly connected with a telescopic plate 403; the rear part of the upper side of the slurry pool 401 is fixedly connected with a third mounting plate 4012; the front side of the third mounting plate 4012 is fixedly connected with an inclined first electric slide rail 4013; a first electric slide block 4014 is connected to the first electric slide rail 4013 in a sliding manner; the front side of the first electric slide block 4014 is fixedly connected with a fourth mounting plate 4015; the upper side of the fourth mounting plate 4015 is fixedly connected with a second wedge block 4011; a first electric push rod 4016 is fixedly connected to the lower side of the fourth mounting plate 4015; the flexible end of first electric putter 4016 and scribble board 4010 rear portion and carry out fixed connection.

The flexible end of the flexible board 403 is set to be arc-shaped to prevent the copper foil from being scratched.

The coating plate 4010 is arranged in an arch shape and is used for arching the middle of the copper foil.

The drying unit comprises a sixth mounting rack 501, a drying box 502 and a heating wire 503; two sixth mounting brackets 501 are fixedly connected to the middle of the upper side of the first mounting plate 2, and the two sixth mounting brackets 501 are positioned on the left of the second mounting bracket 302; the tops of the two sixth mounting frames 501 are fixedly connected with a drying box 502; the drying box 502 is provided with heating wires 503 at the upper and lower portions thereof, respectively.

When the device works, an external copper foil unwinding roller is placed at the left side of a lithium battery silicon-based film negative plate preparation device in advance, the device is called as the negative plate preparation device for short hereinafter, an external copper foil winding roller is placed at the right side of the negative plate preparation device, then a copper foil is pulled out from the external copper foil unwinding roller, then the copper foil passes through a transmission unit and is wound on the external copper foil winding roller, the external copper foil winding roller sequentially passes through a leveling unit and a drying unit while passing through the transmission unit, then the external copper foil winding roller is controlled to wind the copper foil, the external copper foil unwinding roller simultaneously discharges the copper foil, the transmission unit starts to cooperate with the transmission of the copper foil, the copper foil is smoothly transferred to working areas of the leveling unit and the drying unit, when the copper foil passes through the leveling unit, the leveling unit firstly immerses the copper foil into a slurry tank 401, a large amount of silicon-based slurry is adhered to the upper surface and the lower surface of the copper foil, and the excessive silicon-based slurry can naturally fall down, then, the silicon-based slurry on the lower surface of the copper foil is coated and leveled in the advancing direction through the coating plate 4010, and the middle part of the copper foil is arched upwards, so that the silicon-based slurry on the upper surface of the copper foil naturally falls into the slurry tank 401 in advance, and meanwhile, the silicon-based slurry on the upper surface of the copper foil is coated and leveled in the direction perpendicular to the advancing direction through the two expansion plates 403, so that a smooth silicon-based slurry coating layer is obtained, the problem that the thickness of a silicon-based thin film layer coated on the surface of the copper foil is uneven in the prior art is solved, then the copper foil coated with the silicon-based slurry moves to the right to the drying unit, the drying unit dries the silicon-based slurry coating layers on the upper surface and the lower surface of the copper foil, and then the lithium battery silicon-based thin film negative plate is obtained.

Before work, the silicon-based slurry is poured into the slurry pool 401 in advance, an external copper foil unwinding roller is placed at the left side of the negative plate preparation device in advance, an external copper foil winding roller is placed at the right side of the negative plate preparation device in advance, then the copper foil is pulled out of the external copper foil unwinding roller, the copper foil sequentially passes through the copper foil on the second electric guide roller 306, the third electric guide roller 307, the seventh electric guide roller 4018, the eighth electric guide roller 4019, the second electric guide roller 306, the third electric guide roller 307, the seventh electric guide roller 4018, the eighth electric guide roller 4019 and the sixth electric guide roller 4017 to be in a V shape integrally, because the seventh electric guide roller 4018 and the eighth electric guide roller 4019 are positioned in the slurry pool 401, after passing through the seventh electric guide roller 4018 and the eighth electric guide roller 4019, a layer of the slurry is adhered to the surface of the copper foil, and then the copper foil is wound around the sixth electric guide roller 4017 and the ninth electric guide roller 3010, then the silicon-based slurry coating layer passes through a drying box 502 and is positioned between two electric heating wires 503, the silicon-based slurry coating layer on the upper surface and the lower surface of the copper foil is dried through the two electric heating wires 503, then the silicon-based slurry coating layer bypasses a ninth electric guide roller 3010 and a first electric guide roller 305, then the silicon-based slurry coating layer passes through a fourth electric guide roller 308 and a fifth electric guide roller 309, then the silicon-based slurry coating layer is wound on an external copper foil take-up roller, then the external copper foil take-up roller is controlled to rotate, meanwhile, a second electric guide roller 306 and a third electric guide roller 307, a seventh electric guide roller 4018 and an eighth electric guide roller 4019, a sixth electric guide roller 4017, a ninth electric guide roller 3010, a first electric guide roller 305, a fourth electric guide roller 308 and a fifth electric guide roller 309 are matched to rotate by taking 4014010 as a reference from front view, wherein the third electric guide roller 307, the eighth electric guide roller 4019, the sixth electric guide roller 3017, the ninth electric guide roller 3010, the first electric guide roller 305 and the fifth electric guide roller 309 rotate clockwise, the second electric guide roller 306, the seventh electric guide roller 4018 and the fourth electric guide roller 308 rotate anticlockwise, the copper foils positioned between the seventh electric guide roller 4018 and the eighth electric guide roller 4019 and on the sixth electric guide roller 4017 are in an inclined state, at the moment, redundant slurry on the lower surface of the copper foils naturally drops, meanwhile, two leveling assemblies are started to level silicon-based slurry on the surface of the copper foils, when the rear leveling assemblies work, the first electric push rod 4016 is controlled to drive the leveling plate 4010 to move towards the direction close to the copper foils until the leveling plate 4010 is contacted with the lower surface of the copper foils, the middle part of the copper foils is arched, at the moment, redundant slurry on the upper surface of the copper foils naturally flows downwards, then the first electric slide rail 4013 is controlled to drive the first electric slide block 4014 to reciprocate, the first electric slide block 4014 drives the fourth installation plate 4015 to reciprocate, the fourth installation plate 4015 drives the second wedge block 4011 and the first electric push rod 4016 to reciprocate, when the first electric push rod 4016 moves in a reciprocating way, the coating plate 4010 is driven to move in a reciprocating way to coat the slurry on the lower surface of the copper foil; when the second wedge block 4011 is driven to move back and forth, the second wedge block 4011 intermittently pushes the first wedge block 409 to move back, the first wedge block 409 drives the second L-shaped plate 407 to move back when moving back, the second L-shaped plate 407 drives the straight slider 406 to slide back on the straight rail 405 when moving back, meanwhile, the straight slider 406 stretches the first spring 408, and then the first spring 408 resets to drive the second wedge block 4011 to return to the initial state, so that the first wedge block 409 moves back and forth in a reciprocating manner, that is, the telescopic plate 403 reciprocates, the middle of the copper foil arches upwards under the action of the coating plate 4010, the telescopic plate can be attached to the upper surface of the copper foil through automatic telescoping, so that slurry on the upper surface of the copper foil is coated flatly when the telescopic plate 403 reciprocates, and thus a silicon-based slurry coating layer on the upper surface of the copper foil and a slurry coating layer on the lower surface of the copper foil are both flat.

Example 2

On the basis of the embodiment 1, as shown in fig. 1 and fig. 10-17, the lithium supplement device further comprises a lithium supplement powder unit; the right part of the upper side of the first mounting plate 2 is connected with a lithium supplement unit, and the lithium supplement unit is connected with the transmission unit; the lithium powder supplementing unit comprises a seventh mounting rack 601, a second spring 602, a fifth mounting board 603, a first vibrating motor 604, an eighth mounting rack 605, a second electric slide rail 606, a second electric slide block 607, a baffle 608, a lithium powder box 609, a second electric push rod 6010, a first insulating block 6011, a first wire mesh fastening rod 6012, an insulating slide rail 6013, a second insulating block 6014, a straight plate electrode 6015, a third insulating block 6016, a second wire mesh fastening rod 6017, a third L-shaped block 6018, a wire mesh electrode 6019, a second vibrating motor 6020 and an eleventh mounting board 6021; two seventh mounting brackets 601 which are symmetrically arranged are fixedly connected to the right part of the upper side of the first mounting plate 2, the two seventh mounting brackets 601 are positioned on the right of the two second mounting brackets 302, and the two seventh mounting brackets 601 are positioned on the left of the third mounting bracket 303; two second springs 602 which are symmetrically arranged are fixedly connected to the upper sides of the two seventh mounting frames 601 respectively; the upper ends of the two front second springs 602 are fixedly connected with a fifth mounting plate 603; a second vibrating motor 6020 is fixedly connected to the upper side of the fifth mounting plate 603, and a third insulating block 6016 is fixedly connected to the rear side of the fifth mounting plate 603; a second wire mesh fastening rod 6017 is fixedly connected to the rear side of the third insulating block 6016; the upper ends of the two second springs 602 at the rear are fixedly connected with an eleventh mounting plate 6021; the upper side of the eleventh mounting plate 6021 is fixedly connected with a first vibrating motor 604; a third L-shaped block 6018 is fixedly connected to the right side of the eleventh mounting plate 6021; the front side of the eleventh mounting plate 6021 is fixedly connected with an insulating slide rail 6013; a first wire mesh fastening rod 6012 is slidably connected to the insulating slide rail 6013; a screen electrode 6019 is fixedly connected between the first screen fastening rod 6012 and the second screen fastening rod 6017; the screen electrode 6019 is used to uniformly spread lithium powder on the upper surface of the copper foil; a second electric push rod 6010 is fixedly connected to the front part of the third L-shaped block 6018; the telescopic end of the second electric push rod 6010 is connected with a first wire mesh fastening rod 6012 through a first insulating block 6011; two eighth mounting brackets 605 which are symmetrically arranged are fixedly connected to the upper side of the second mounting bracket 302, and the right parts of the two eighth mounting brackets 605 are fixedly connected to the upper side of the third mounting bracket 303; a lithium powder box 609 is fixedly connected between the two eighth mounting frames 605; the middle parts of the opposite sides of the two eighth mounting racks 605 are respectively and fixedly connected with a second electric slide rail 606; two second electric sliding blocks 607 are respectively connected to the opposite sides of the two second electric sliding rails 606 in a sliding manner; a baffle 608 is fixedly connected to the opposite sides of the two second electric sliders 607, the baffle 608 is positioned above the screen electrode 6019, and the baffle 608 is in contact with the lower surface of the lithium powder box 609.

The bottom of the lithium powder box 609 is provided with a blanking groove, and the baffle 608 is provided with a through rectangular groove for controlling the falling of the lithium powder.

The mesh electrode 6019 is woven from conductive metal wires, which facilitates adjustment of mesh size.

The device also comprises a leveling unit; the upper right part of the first mounting plate 2 is connected with a leveling unit; the leveling unit comprises a fifth mounting frame 701, a sixth mounting plate 702, a main motor 703, a third spring 704, a transmission shaft 705, a long bump 706, a seventh mounting plate 707, an eighth mounting plate 708, a ninth mounting plate 709, an elastic membrane frame 7010 and a pressing block 7011; two symmetrically arranged fifth mounting brackets 701 are fixedly connected to the right part of the upper side of the first mounting plate 2, the fifth mounting brackets 701 are positioned on the right side of the third mounting bracket 303, and the fifth mounting brackets 701 are positioned on the left side of the two fourth mounting brackets 304; the upper sides of the two fifth mounting frames 701 are fixedly connected with a sixth mounting plate 702; the rear side of the sixth mounting plate 702 is provided with a main motor 703; the middle part of the sixth mounting plate 702 is rotatably connected with a transmission shaft 705; an eighth mounting plate 708 and a ninth mounting plate 709 are fixedly connected to the lower portion of the inner wall of the sixth mounting plate 702, and the eighth mounting plate 708 is located on the right of the ninth mounting plate 709; four corners of the top inside the sixth mounting plate 702 are fixedly connected with a third spring 704 respectively; the lower ends of the four third springs 704 are fixedly connected with a seventh mounting plate 707; an output shaft of the main motor 703 is fixedly connected with a transmission shaft 705; the outer surface of the transmission shaft 705 is fixedly connected with a long lug 706, and the long lug 706 is positioned above the seventh mounting plate 707; eight elastic membrane frames 7010 are fixedly connected to the eighth mounting plate 708; the ninth mounting plate 709 is fixedly connected with nine elastic membrane frames 7010; nine press blocks 7011 are fixedly connected to the left portion of the lower side of the seventh mounting plate 707, eight press blocks 7011 are fixedly connected to the right portion of the lower side, and the press blocks 7011 correspond to the elastic membrane frames 7010 one to one.

The elastic film frame 7010 fixedly connected to the eighth mounting plate 708 and the elastic film frame 7010 fixedly connected to the ninth mounting plate 709 of the elastic film frame 7010 are arranged in a staggered manner to level lithium powder accumulated on the upper surface of the copper foil.

The lower part of the elastic membrane frame 7010 is provided with an arc-shaped elastic membrane for forming air pressure to break up the accumulated lithium powder.

The lower side of the pressing block 7011 is arc-shaped to prevent the elastic film at the lower part of the elastic film frame 7010 from being punctured.

Before working, lithium powder is added into a lithium powder box 609 in advance, copper foil passes through a space between a screen mesh electrode 6019 and a straight plate electrode 6015, and the copper foil is located below an elastic membrane frame 7010, in order to reduce the reduction of the capacity of a lithium battery, lithium supplement operation needs to be performed on the lithium battery, two second electric slide rails 606 are controlled to drive two second electric slide blocks 607 to slide, the two second electric slide blocks 607 drive a baffle 608 to move, so that the baffle 608 slides away from the lower part of a notch at the lower part of the lithium powder box 609, a blanking groove at the bottom of the lithium powder box 609 is communicated with a rectangular groove of the baffle 608, and then the lithium powder falls to the screen mesh electrode 6019 from the blanking groove at the bottom of the lithium powder box 609, meanwhile, a first vibrating motor 604 and a second vibrating motor 6020 are started synchronously, the first vibrating motor 604 drives an eleventh mounting plate 6021 to vibrate on two second springs 602 at the rear part, the eleventh mounting plate 6021 transmits vibration to the screen mesh electrode 6019 through a first screen mesh fastening rod 6012 and an insulating slide rail 6013, meanwhile, the second vibrating motor 6020 drives the fifth mounting plate 603 to vibrate, the fifth mounting plate 603 transmits vibration to the screen electrode 6019 through the third insulating block 6016 and the second screen fastening rod 6017, so as to drive the screen electrode 6019 to vibrate integrally, the screen electrode 6019 vibrates to drive the lithium powder falling thereon to shake, and then the lithium powder falls through the meshes of the screen electrode 6019, meanwhile, the first screen fastening rod 6012 and the second screen fastening rod 6017 are energized, and the straight plate electrode 6015 is energized, so that an electrostatic field is formed between the screen electrode 6019 and the straight plate electrode 6015, when the lithium powder falls, the lithium powder falls on the upper surface of the copper foil under the action of an electric field force, and the lithium powder is prevented from floating in the air, lithium batteries of different types need to be supplemented with different lithium contents, so that the content of the falling lithium powder needs to be controlled, at this time, the second electric push rod 6010 is controlled to start to drive the first screen fastening rod 6012 to slide on the insulating slide rail 6013, the first screen fastening rod 6012 drives one end of the screen electrode 6019 to move, so that the size of the mesh on the screen electrode 6019 can be controlled, and the falling amount of lithium powder in unit time can be controlled; simultaneously starting the main motor 703, then the main motor 703 drives the transmission shaft 705 to rotate through the output shaft, the transmission shaft 705 drives the long bump 706 to rotate, the long bump 706 rotates and contacts with the seventh mounting plate 707 to enable the seventh mounting plate 707 to move downwards, simultaneously the seventh mounting plate 707 pulls the third spring 704 downwards, the long bump 706 continues to rotate, the third spring 704 returns to a normal state from a stretching state, the seventh mounting plate 707 is pulled upwards through the third spring 704, thereby the seventh mounting plate 707 is driven to reciprocate and move upwards and downwards through the continuous rotation of the long bump 706, when the seventh mounting plate 707 moves downwards, the seventy pressing block 7011 is simultaneously driven to move downwards, when the pressing block 7011 moves downwards, the arc-shaped film at the lower part of the elastic film frame 7010 is pressed downwards to generate air pressure, if a lithium powder pile exists, the generated air pressure bombards and flattens the lithium powder pile, then the copper foil passes between the fourth electric guide roller 308 and the fifth electric guide roller 309, the fourth motorized roller 308 compacts the lithium powder on the surface of the copper foil while rotating.

The present application is described in detail above, and the principles and embodiments of the present application are described herein by using specific examples, which are only used to help understand the method and the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.