LU503423B1 - Machining method for positive and negative pole pieces of lithium battery - Google Patents
Machining method for positive and negative pole pieces of lithium battery Download PDFInfo
- Publication number
- LU503423B1 LU503423B1 LU503423A LU503423A LU503423B1 LU 503423 B1 LU503423 B1 LU 503423B1 LU 503423 A LU503423 A LU 503423A LU 503423 A LU503423 A LU 503423A LU 503423 B1 LU503423 B1 LU 503423B1
- Authority
- LU
- Luxembourg
- Prior art keywords
- lifting seat
- pole piece
- frame plate
- barrel
- press
- Prior art date
Links
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 25
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 238000003754 machining Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000002904 solvent Substances 0.000 claims abstract description 12
- 239000011230 binding agent Substances 0.000 claims abstract description 8
- 239000006258 conductive agent Substances 0.000 claims abstract description 8
- 239000007772 electrode material Substances 0.000 claims abstract description 8
- 239000002002 slurry Substances 0.000 claims abstract description 8
- 239000011248 coating agent Substances 0.000 claims abstract description 7
- 238000000576 coating method Methods 0.000 claims abstract description 7
- 239000006185 dispersion Substances 0.000 claims abstract description 4
- 239000011267 electrode slurry Substances 0.000 claims abstract description 4
- 238000002360 preparation method Methods 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims abstract description 4
- 238000001035 drying Methods 0.000 claims abstract description 3
- 238000002156 mixing Methods 0.000 claims abstract description 3
- 238000005520 cutting process Methods 0.000 claims description 32
- 238000010586 diagram Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011255 nonaqueous electrolyte Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0404—Machines for assembling batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
- H01M4/1395—Processes of manufacture of electrodes based on metals, Si or alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/01—Means for holding or positioning work
- B26D7/015—Means for holding or positioning work for sheet material or piles of sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/18—Means for removing cut-out material or waste
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/18—Means for removing cut-out material or waste
- B26D7/1845—Means for removing cut-out material or waste by non mechanical means
- B26D7/1863—Means for removing cut-out material or waste by non mechanical means by suction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/38—Cutting-out; Stamping-out
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/38—Cutting-out; Stamping-out
- B26F1/40—Cutting-out; Stamping-out using a press, e.g. of the ram type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/38—Cutting-out; Stamping-out
- B26F1/44—Cutters therefor; Dies therefor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/134—Electrodes based on metals, Si or alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The present invention relates to a machining method for positive and negative pole pieces of a lithium battery. All raw materials in the positive and negative poles of the lithium battery are as follows in parts by mass: 80-100 parts of an electrode active material, 60-80 parts of a solvent, 5-10 parts of a binder and 1-4 parts of a conductive agent. Preparation of electrode slurry: mixing the electrode active material, the solvent, the binder and the conductive agent together, and performing full stirring and dispersion to form slurry; coating: uniformly coating a current collector with the slurry prepared in the first step, and drying the solvent; and blanking of pole pieces: blanking, by a blanking device, the pole pieces prepared in the second step into a specified size and shape.
Description
BL-5603
MACHINING METHOD FOR POSITIVE AND NEGATIVE POLE PIECES OF | -U503423
LITHIUM BATTERY
[01] The present invention relates to the technical field of lithium battery machining, in particular to a machining method for positive and negative pole pieces of a lithium battery.
[02] Lithium battery is a battery which uses lithium metal or lithium alloy as a negative pole material and uses a non-aqueous electrolyte solution. Therefore, this battery is also referred to as a lithium metal battery.
[03] In a machining process, positive and negative pole pieces of a lithium battery are blanked into different shapes by a blanking device. However, the existing blanking device cannot limit pole pieces during blanking, and the pole pieces are prone to deviate during the blanking. In addition, after the blanking is completed, the pole pieces need to be manually unloaded, instead of being automatically unloaded, so that the automation degree is low.
[04] The problem solved by the present invention is to provide a machining method for positive and negative pole pieces of a lithium battery. The following technical problems are solved: In a machining process, positive and negative poles of a lithium battery are blanked into different shapes by a blanking device. However, the existing blanking device cannot limit pole pieces during blanking, and the pole pieces are prone to deviate during the blanking. In addition, after the blanking is completed, the pole pieces need to be manually unloaded, instead of being automatically unloaded, so that the automation degree is low.
[05] In order to achieve the foregoing purpose, the present invention adopts the following technical solution.
A machining method for positive and negative pole pieces of a lithium battery is provided. All raw materials in the positive and negative poles of the lithium battery are as follows in parts by mass: 80-100 parts of an electrode active material, 60-80 parts of a solvent, 5-10 parts of a binder and 1-4 parts of a conductive agent; specific operations of the machining method are as follows: step I: preparation of electrode slurry: mixing the electrode active material, the solvent, the binder and the conductive agent together, and performing full stirring and dispersion to form slurry; step IT: coating: uniformly coating a current collector with the slurry prepared in the first step, and drying the solvent; and step III: blanking of pole pieces: blanking, by a blanking device, the pole pieces prepared in step II into a specified size and shape, wherein the pole piece moves on a base; a pressure bar works to drive a piston rod to move, thus driving a lifting seat to 1
BL-5603 move; an upper press-cutting die on the lifting seat cooperates with a lower LU503423 press-cutting die on the base to press and cut the pole piece; a movable frame plate of a limiting mechanism 1s first in contact with the pole piece; when the upper press-cutting die continuously presses the pole piece, the movable frame plate compresses first springs in an inner cavity of a fixed frame plate; the movable frame plate is pressed on a top side of the pole piece under the action of the first springs to limit the pole piece in the press-cutting process; at the same time, the press-cut pole piece continuously moves; when the pole piece passes below suction discs, as the lifting seat moves down, the suction discs are in contact with the press-cut pole piece; an air pump works, and a negative pressure 1s generated in the suction discs to suck the pole piece; after stamping, when the lifting seat moves up to be in contact with a limiting plate, a supporting rod drives a first piston to move up and compress a second spring to press the air in a top barrel into a side barrel; a second piston in the side barrel drives a connecting rod to move, and an unloading slot is moved to be below the suction discs; the air pump works; the blanked pole piece falls from the suction discs onto the unloading slot to complete unloading; when the lifting seat moves down again, the air in the side barrel is sucked into the top barrel through the second spring; and the unloading slot is moved to one side of the lifting seat to avoid blockage to the lifting seat and the moving pole piece.
[06] Preferably, the blanking device includes the base, the supporting seat and the lifting seat; the L-shaped supporting seat is mounted at a top of the base; several guide rods are mounted between the base and the supporting seat; the lifting seat is slidably mounted on outer sides of the guide rods.
The upper press-cutting die and the limiting mechanism are mounted on a bottom side of the lifting seat; the limiting mechanism is located on an outer side of the upper press-cutting die; several supporting pipes are mounted on the bottom side of the lifting seat; the suction discs are mounted at bottom ends of the supporting pipes; a side plate is mounted on a side wall of the supporting seat; and the unloading slot is slidably mounted on the side plate.
[07] Preferably, the pressure bar is mounted at a top of the supporting seat; and the piston rod of the pressure bar is connected with the lifting seat through the supporting seat.
[08] Preferably, the limiting mechanism includes the fixed frame plate and the movable frame plate; the movable frame plate is elastically mounted inside the fixed frame plate; and a bottom end of the movable frame plate is located on the outer side of the fixed frame plate.
[09] Preferably, the inner cavity is formed inside the fixed frame plate; several first springs are mounted inside the inner cavity; and bottom ends of the first springs are all connected with the movable frame plate.
[10] Preferably, the air pump is mounted on the top side of the lifting seat; and the air pump is communicated with the supporting pipes.
[11] Preferably, the top barrel is mounted on a bottom side of the top of the lifting seat; a second spring is mounted inside the top barrel; the second spring is connected with the first piston; the first piston is connected with a top end of the supporting rod; and a bottom end of the supporting rod runs through a bottom of the top barrel and is 2
BL-5603 provided with the limiting plate. LU503423
[12] Preferably, the side barrel is mounted on the side plate; an end of the side barrel away from the side plate is connected with a top end of the top barrel by means of an air pipe; the second piston is mounted inside the side barrel; the second piston is connected with one end of the connecting rod; and the other end of the connecting rod is connected with the unloading slot.
[13] Beneficial effects of the present invention are as follows: During press-cutting by a press-cutting device, when an upper press-cutting die continuously presses the pole piece, a movable frame plate compresses first springs in an inner cavity of a fixed frame plate; the movable frame plate is pressed on a top side of the pole piece under the action of the first springs to limit the pole piece in the press-cutting process, which avoids deviation of the pole piece in the press-cutting process and guarantees the press-cutting accuracy.
Meanwhile, the press-cut pole piece continuously moves; when the pole piece passes below suction discs, as the lifting seat moves down, the suction discs are in contact with the press-cut pole piece; an air pump works, and a negative pressure is generated in the suction discs to suck the pole piece; after stamping, when the lifting seat moves up to be in contact with a limiting plate, a supporting rod drives a first piston to move up and compress a second spring to press the air in a top barrel into a side barrel; a second piston in the side barrel drives a connecting rod to move, and an unloading slot is moved to be below the suction discs; the air pump works; the blanked pole piece falls from the suction discs onto the unloading slot to complete unloading; when the lifting seat moves down again, the air in the side barrel is sucked into the top barrel through the second spring; the unloading slot is moved to one side of the lifting seat to avoid blockage to the lifting seat and the moving pole piece; and the press-cut piece is automatically unloaded according to a moving state of the lifting seat, so that the automation degree is high, and the actual operation and application are facilitated.
[14] FIG 1 is a schematic diagram of an overall first structure of the present invention;
FIG 2 is a schematic diagram of an overall first structure of the present invention;
FIG 3 is a side view of the present invention;
FIG 4 is an internally schematic structural diagram of a limiting mechanism of the present invention; and
FIG 5 is an internally schematic structural diagram of a top barrel and a side barrel of the present invention.
[15] Illustrations in the drawings: 1: base; 2: supporting seat; 3: lifting seat; 4: guide rod; 5: upper press-cutting die; 6: limiting mechanism; 7: lower press-cutting die; 8: supporting pipe; 9: suction disc; 10: side plate; 11: unloading slot; 12: pressure bar; 13: piston rod; 14: air pump; 15: fixed frame plate; 16: movable frame plate; 17: inner cavity; 18: first spring; 19: top barrel, 20: side barrel; 21: second spring; 22: first piston; 23: supporting rod; 24: limiting plate; 3
BL-5603 25: second piston; and 26: connecting rod. LU503423
[16] The technical solutions in the embodiments of the present invention will be described clearly and completely below in combination with the accompanying drawings of the embodiments of the present invention. Apparently, the described embodiments are only part of the embodiments of the present invention, not all embodiments. Based on embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of the present invention.
[17] Specific embodiments are provided below.
[18] Referring to FIG 1 to FIG 5, a machining method for positive and negative pole pieces of a lithium battery is provided. All raw materials in the positive and negative poles of the lithium battery are as follows in parts by mass: 80-100 parts of an electrode active material, 60-80 parts of a solvent, 5-10 parts of a binder and 1-4 parts of a conductive agent; specific operations of the machining method are as follows: step I: preparation of electrode slurry: the electrode active material, the solvent, the binder and the conductive agent are mixed together, and full stirring and dispersion is performed to form slurry; step II: coating: a current collector is uniformly coated with the slurry prepared in the first step, and the solvent is dried; and step III: blanking of pole pieces: a blanking device blanks the pole pieces prepared in step II into a specified size and shape. The pole piece moves on a base 1; at this time, a pressure bar 12 works to drive a piston rod 13 to move, thus driving a lifting seat 3 to move; at this time, an upper press-cutting die 5 on the lifting seat 3 cooperates with a lower press-cutting die 7 on the base 1 to press and cut the pole piece; at this time, a movable frame plate 16 of a limiting mechanism 6 is first in contact with the pole piece; and when the upper press-cutting die 5 continuously presses the pole piece, the movable frame plate 16 compresses first springs 18 in an inner cavity 17 of a fixed frame plate 15. The movable frame plate 16 is pressed on a top side of the pole piece under the action of the first springs 18 to limit the press-cut pole piece. Meanwhile, the press-cut pole piece continuously moves; when the pole piece passes below suction discs 9, as the lifting seat 3 moves down, the suction discs 9 are in contact with the press-cut pole piece; an air pump 14 works, and a negative pressure is generated in the suction discs 9 to suck the pole piece; after stamping, when the lifting seat 3 moves up to be in contact with a limiting plate 24, a supporting rod 23 drives a first piston 22 to move up and compress a second spring 21 to press the air in a top barrel 19 into a side barrel 20; a second piston 25 in the side barrel 20 drives a connecting rod 26 to move, and an unloading slot 11 is moved to be below the suction discs 9; the air pump 14 works; the blanked pole piece falls from the suction discs 9 onto the unloading slot 11 to complete unloading; when the lifting seat 3 moves down again, the air in the side barrel is sucked into the top barrel 19 through the second spring 21; and the unloading slot 11 is moved to one side of the lifting seat 3 to avoid blockage to the lifting seat 3 and 4
BL-5603 the moving pole piece. LU503423
[19] The blanking device includes the base 1, the supporting seat 2 and the lifting seat 3; the L-shaped supporting seat 2 is mounted at a top of the base 1; several guide rods 4 are mounted between the base 1 and the supporting seat 2; the lifting seat 3 1s slidably mounted on outer sides of the guide rods 4; the pressure bar 12 is mounted at a top of the supporting seat 2; and the piston rod 13 of the pressure bar 12 is connected with the lifting seat 3 through the supporting seat 2. The pressure bar 12 works to enable the lifting seat 3 to rise and drop.
The upper press-cutting die 5 and the limiting mechanism 6 are mounted on a bottom side of the lifting seat 3; the limiting mechanism 6 1s located on an outer side of the upper press-cutting die 5; several supporting pipes 8 are mounted on the bottom side of the lifting seat 3; the suction discs 9 are mounted at bottom ends of the supporting pipes 8; a side plate 10 is mounted on a side wall of the supporting seat 2; the unloading slot 11 is slidably mounted on the side plate 10; the limiting mechanism 6 includes the fixed frame plate 15 and the movable frame plate 16; the movable frame plate 16 is elastically mounted inside the fixed frame plate 15; a bottom end of the movable frame plate 16 is located on the outer side of the fixed frame plate 15; the inner cavity 17 is formed inside the fixed frame plate 15; several first springs 18 are mounted inside the inner cavity 17; and bottom ends of the first springs 18 are all connected with the movable frame plate 16. When the upper press-cutting die 5 continuously presses the pole piece, the movable frame plate 16 compresses first springs 18 in the inner cavity 17 of the fixed frame plate 15; and the movable frame plate 16 is pressed on a top side of the pole piece under the action of the first springs 18 to limit the press-cut pole piece.
The air pump 14 is mounted on the top side of the lifting seat 3; the air pump 14 is communicated with the supporting pipes 8. The air pump 14 works to realize suction and separation between the suction discs 9 and the press-cut pole piece. The top barrel 19 is mounted on a bottom side of the top of the lifting seat 3; a second spring 21 is mounted inside the top barrel 19; the second spring 21 is connected with the first piston 22; the first piston 22 is connected with a top end of the supporting rod 23; and a bottom end of the supporting rod 23 runs through a bottom of the top barrel 19 and is provided with the limiting plate 24. The side barrel 20 is mounted on the side plate 10; an end of the side barrel 20 away from the side plate 10 is connected with a top end of the top barrel 19 by means of an air pipe; the second piston 25 is mounted inside the side barrel 20; the second piston 25 is connected with one end of the connecting rod 26; and the other end of the connecting rod 26 is connected with the unloading slot 11. The lifting seat 3 moves up to be in contact with the limiting plate 24, and at this time, the supporting rod 23 drives the first piston 22 to move up and compress the second spring 21 to press the air in the top barrel 19 into the side barrel 20; the second piston 25 in the side barrel 20 drives the connecting rod 26 to move, and the unloading slot 11 is moved to be below the suction discs 9; the air pump 14 works; the blanked pole piece falls from the suction discs 9 onto the unloading slot 11 to complete unloading; when the lifting seat 3 moves down again, the air in the side barrel 20 is sucked into the top barrel 19 through the second spring 21; and the unloading slot 11 is moved to one side of the lifting seat 3.
BL-5603
[20] During press-cutting by the press-cutting device, when the upper press-cutting LU503423 die 5 continuously presses the pole piece, the movable frame plate 16 compresses the first springs 18 in the inner cavity 17 of the fixed frame plate 15; the movable frame plate 16 is pressed on a top side of the pole piece under the action of the first springs 18 to limit the pole piece in the press-cutting process, which avoids deviation of the pole piece in the press-cutting process and guarantees the press-cutting accuracy.
Meanwhile, the press-cut pole piece continuously moves; when the pole piece passes below the suction discs 9, as the lifting seat 3 moves down, the suction discs 9 are in contact with the press-cut pole piece; the air pump 14 works, and a negative pressure 1s generated in the suction discs 9 to suck the pole piece; after stamping, when the lifting seat 3 moves up to be in contact with the limiting plate 24, the supporting rod 23 drives the first piston 22 to move up and compress the second spring 21 to press the air in the top barrel 19 into the side barrel 20; the second piston 25 in the side barrel 20 drives the connecting rod 26 to move, and the unloading slot 11 is moved to be below the suction discs 9; the air pump 14 works; the blanked pole piece falls from the suction discs 9 onto the unloading slot 11 to complete unloading; when the lifting seat 3 moves down again, the air in the side barrel 20 is sucked into the top barrel 19 through the second spring 21; the unloading slot 11 is moved to one side of the lifting seat 3 to avoid blockage to the lifting seat 3 and the moving pole piece; and the press-cut piece is automatically unloaded according to a moving state of the lifting seat 3, so that the automation degree is high, and the actual operation and application are facilitated.
[21] The above descriptions are only specific preferred implementation modes of the present invention, but the scope of protection of the present invention is not limited thereto. For any person skilled in the art, within the technical scope disclosed by the present invention, equivalent substitutions or changes made according to the technical solution of the present invention and an inventive idea of the present invention shall all fall within the scope of protection of the present invention. 6
Claims (8)
1. A machining method for positive and negative pole pieces of a lithium battery, characterized in that all raw materials in the positive and negative poles of the lithium battery are as follows in parts by mass: 80-100 parts of an electrode active material, 60-80 parts of a solvent, 5-10 parts of a binder and 1-4 parts of a conductive agent; specific operations of the machining method are as follows: step I: preparation of electrode slurry: mixing the electrode active material, the solvent, the binder and the conductive agent together, and performing full stirring and dispersion to form slurry; step II: coating: uniformly coating a current collector with the slurry prepared in the first step, and drying the solvent; and step III: blanking of pole pieces: blanking, by a blanking device, the pole pieces prepared in step II into a specified size and shape, wherein the pole piece moves on a base (1); a pressure bar (12) works to drive a piston rod (13) to move, thus driving a lifting seat (3) to move; an upper press-cutting die (5) on the lifting seat (3) cooperates with a lower press-cutting die (7) on the base (1) to press and cut the pole piece; a movable frame plate (16) of a limiting mechanism (6) is first in contact with the pole piece; when the upper press-cutting die (5) continuously presses the pole piece, the movable frame plate (16) compresses first springs (18) in an inner cavity (17) of a fixed frame plate (15); the movable frame plate (16) is pressed on a top side of the pole piece under the action of the first springs (18) to limit the pole piece in the press-cutting process; at the same time, the press-cut pole piece continuously moves; when the pole piece passes below suction discs (9), as the lifting seat (3) moves down, the suction discs (9) are in contact with the press-cut pole piece; an air pump (14) works, and a negative pressure is generated in the suction discs (9) to suck the pole piece; after stamping, when the lifting seat (3) moves up to be in contact with a limiting plate (24), a supporting rod (23) drives a first piston (22) to move up and compress a second spring (21) to press the air in a top barrel (19) into a side barrel (20); a second piston (25) in the side barrel (20) drives a connecting rod (26) to move, and an unloading slot (11) is moved to be below the suction discs (9); the air pump (14) works; the blanked pole piece falls from the suction discs (9) onto the unloading slot (11) to complete unloading; when the lifting seat (3) moves down again, the air in the side barrel (20) is sucked into the top barrel (19) through the second spring (21); and the unloading slot (11) is moved to one side of the lifting seat (3) to avoid blockage to the lifting seat (3) and the moving pole piece.
2. The machining method for the positive and negative pole pieces of the lithium battery according to claim 1, characterized in that the blanking device comprises the base (1), the supporting seat (2) and the lifting seat (3); the L-shaped supporting seat (2) is mounted at a top of the base (1); several guide rods (4) are mounted between the base (1) and the supporting seat (2); the lifting seat (3) is slidably mounted on outer sides of the guide rods (4); the upper press-cutting die (5) and the limiting mechanism (6) are mounted on a 7
BL-5603 bottom side of the lifting seat (3); the limiting mechanism (6) is located on an outer side LU503423 of the upper press-cutting die (5); several supporting pipes (8) are mounted on the bottom side of the lifting seat (3); the suction discs (9) are mounted at bottom ends of the supporting pipes (8); a side plate (10) is mounted on a side wall of the supporting seat (2); and the unloading slot (11) is slidably mounted on the side plate (10).
3. The machining method for the positive and negative pole pieces of the lithium battery according to claim 2, characterized in that the pressure bar (12) is mounted at a top of the supporting seat (2); and the piston rod (13) of the pressure bar (12) is connected with the lifting seat (3) through the supporting seat (2).
4. The machining method for the positive and negative pole pieces of the lithium battery according to claim 2, characterized in that the limiting mechanism (6) comprises the fixed frame plate (15) and the movable frame plate (16); the movable frame plate (16) is elastically mounted inside the fixed frame plate (15); and a bottom end of the movable frame plate (16) is located on the outer side of the fixed frame plate (15).
5. The machining method for the positive and negative pole pieces of the lithium battery according to claim 4, characterized in that the inner cavity (17) is formed inside the fixed frame plate (15); several first springs (18) are mounted inside the inner cavity (17); and bottom ends of the first springs (18) are all connected with the movable frame plate (16).
6. The machining method for the positive and negative pole pieces of the lithium battery according to claim 2, characterized in that the air pump (14) is mounted on the top side of the lifting seat (3); and the air pump (14) is communicated with the supporting pipes (8).
7. The machining method for the positive and negative pole pieces of the lithium battery according to claim 2, characterized in that the top barrel (19) is mounted on a bottom side of the top of the lifting seat (3); a second spring (21) is mounted inside the top barrel (19); the second spring (21) is connected with the first piston (22); the first piston (22) is connected with a top end of the supporting rod (23); and a bottom end of the supporting rod (23) is provided with the limiting plate (24) through a bottom of the top barrel (19).
8. The machining method for the positive and negative pole pieces of the lithium battery according to claim 2, characterized in that the side barrel (20) is mounted on the side plate (10); an end of the side barrel (20) away from the side plate (10) is connected with a top end of the top barrel (19) by means of an air pipe; the second piston (25) is mounted inside the side barrel (20); the second piston (25) is connected with one end of the connecting rod (26); and the other end of the connecting rod (26) is connected with the unloading slot (11). 8
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| CN202210294282.5A CN114759165B (en) | 2022-03-24 | 2022-03-24 | A processing method for positive and negative electrode plates of lithium batteries |
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| CN115301496B (en) * | 2022-09-02 | 2024-03-12 | 天科新能源有限责任公司 | Sodium ion battery negative plate dip coating device for uniformly dispersing slurry and operation method |
| CN115318560B (en) * | 2022-09-05 | 2024-03-12 | 天科新能源有限责任公司 | Sodium ion battery electrode coating device and operation method |
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| US8926715B2 (en) * | 2007-12-06 | 2015-01-06 | Eliiy Power Co., Ltd. | Method and apparatus for manufacturing electrode assembly for rectangular battery |
| CN201676975U (en) * | 2010-03-15 | 2010-12-22 | 苏州星恒电源有限公司 | A discharge device for a lithium battery pole piece slicer |
| KR101726780B1 (en) * | 2013-09-24 | 2017-04-13 | 주식회사 엘지화학 | Notching Device Having Scrap-removing Means |
| CN210615268U (en) * | 2019-07-22 | 2020-05-26 | 嵇旭辉 | Pole piece slitting equipment for lithium battery production |
| CN110416628B (en) * | 2019-08-06 | 2024-08-13 | 深圳市格林晟科技股份有限公司 | Die-cutting and lamination integrated equipment |
| CN212494781U (en) * | 2020-04-14 | 2021-02-09 | 广东安电能源科技有限公司 | Punching device for lithium battery pole piece |
| CN112264664A (en) * | 2020-10-31 | 2021-01-26 | 安徽锐之利精密刀模有限公司 | Cutter structure for cutting positive and negative electrodes of lithium battery |
| CN113319198A (en) * | 2021-06-09 | 2021-08-31 | 中聚达(湖北)新能源有限公司 | Lithium battery pole piece punch forming processing machine and method |
| CN113442214A (en) * | 2021-06-25 | 2021-09-28 | 中聚达(湖北)新能源有限公司 | Lithium ion battery pole piece forming processing method |
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| NL2034063A (en) | 2023-10-03 |
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