阅读说明：本技术 一种电池极片加工工艺 (Battery pole piece processing technology ) 是由 钱车华 于 2019-10-18 设计创作，主要内容包括：本发明公开了一种电池极片加工工艺,包括以下步骤：浆料制备、涂布、辊压、干燥、分切、刷粉。所述刷粉机包括第一输送装置、第一刷粉装置、旋转装置、第二刷粉装置、第二输送装置,通过第一输送装置把需刷粉的极片运输至第一刷粉装置,第一刷粉装置对极片相对两端进行除毛刺和粉状颗粒,通过旋转装置使经过第一刷粉装置处理的极片旋转90°并移动至第二输送装置上,第二输送装置使极片移动至第二刷粉装置处,对极片另外相对两端进行除毛刺和粉状颗粒。本发明刷粉速度快、效率高、可较好地清除毛刺和粉状颗粒。(The invention discloses a battery pole piece processing technology, which comprises the following steps: preparing slurry, coating, rolling, drying, slitting and brushing. The brush powder machine includes first conveyor, first brush powder device, rotary device, second brush powder device, second conveyor, transports the pole piece that needs the brush powder to first brush powder device through first conveyor, and first brush powder device removes burr and likepowder granule to the relative both ends of pole piece, makes the pole piece rotation 90 that handles through first brush powder device and remove to the second conveyor on through rotary device, and second conveyor makes the pole piece remove to second brush powder device department, removes burr and likepowder granule to the other relative both ends of pole piece. The invention has the advantages of high brushing speed and high efficiency, and can better remove burrs and powdery particles.)

1. A battery pole piece processing technology is characterized in that: the method comprises the following steps:

a. preparing slurry: stirring the slurry by a stirring device, and uniformly dispersing the slurry;

b. coating: coating the prepared slurry on the front and back sides of the current collector metal foil by coating equipment, wherein the coating on the front and back sides of the pole piece is symmetrical;

c. and (3) drying: drying the coated pole piece by using a drying device to obtain a dried electrode structure;

d. rolling: after drying, the pole piece is rolled and compacted by a roller press;

e. slitting: cutting the rolled pole piece into required size by a cutting device;

f. brushing powder: removing burrs and powdery particles generated after the pole pieces are cut from the cut pole pieces through a powder brushing machine;

the powder brushing machine comprises a first conveying device (1), a first powder brushing device (2), a rotating device (3), a second powder brushing device (4) and a second conveying device (5), wherein the first powder brushing device (2) comprises a dust collection box (20) arranged on the first conveying device, a dust collection hole (21) arranged at the bottom of the dust collection box, a left support (22) arranged on the upper left side of the dust collection box, a right support (23) arranged on the upper right side of the dust collection box, a left powder brushing part (24) arranged on the left support and a right powder brushing part (25) arranged on the right support, the left powder brushing part and the right powder brushing part are identical in structure, and the left powder brushing part comprises a rotating shaft (240), a first rolling brush wheel (241) fixed on the rotating shaft, a driven gear (242) fixed on the rotating shaft and arranged above the first rolling brush wheel, and a driving gear (243) horizontally meshed with the driven gear, The first driving piece (244) drives the driving gear to rotate, the second rolling brush wheel (245) arranged at the upper part of the left support, the third rolling brush wheel (246) arranged at the lower part of the left support, a first connecting piece (247) and a second connecting piece (248), wherein one end of the first connecting piece is fixed at the central position of the rotating shaft, the other end of the first connecting piece is fixed at the central position of the second rolling brush wheel, and the first connecting piece and the second connecting piece have the same structure; first driving piece drive driving gear rotates, drive driven gear and rotate, thereby drive first round brush wheel and rotate, carry out the round brush to the pole piece cutting terminal surface of process, through first connecting piece and second connecting piece, drive second round brush wheel and third round brush wheel and rotate, respectively to the pole piece of process above and below the round brush, the dust collection box is collected burr and the likepowder granule of brushing off, accomplish the left side burring and the likepowder granule to the pole piece, right side brush powder portion is to pole piece right side burring and likepowder granule.

2. The battery pole piece processing technology of claim 1, wherein: and c, stirring revolution speed in the step a is 15-20r/min, stirring rotation speed is 10-15m/s, and stirring time is 2-3 h.

3. The battery pole piece processing technology of claim 1, wherein: and c, in the step b, the coating speed is 5m/min, the thickness of the metal foil is 20 microns, and the width of the metal foil is 350 mm.

4. The battery pole piece processing technology of claim 1, wherein: the drying temperature in the step c is 100-130 ℃.

5. The battery pole piece processing technology of claim 1, wherein: the rolling pressure in the step d is 1-10000kgf, and the rolling speed is 15-50 m/min.

6. The battery pole piece processing technology of claim 1, wherein: the rotating device (3) comprises a moving piece (30), a hydraulic piece (31) arranged on the moving piece, a rotating cylinder (32) positioned below the hydraulic piece, a fixed seat (33) arranged on the rotating cylinder, a moving block (34) positioned inside the fixed seat, a fixed column (35) arranged on the moving block, a rotating assembly (36) arranged on the fixed seat, a second driving piece (37) driving the rotating assembly to rotate, a connecting rod (38) and a plurality of suckers (39) arranged at the bottom of the fixed seat, wherein one end of the connecting rod is rotatably arranged on the fixed column, and the other end of the connecting rod is sleeved on the; the hydraulic part drives the rotary cylinder and the fixing seat to move downwards, the sucker is attached to the pole piece, the second driving part drives the rotating assembly, the moving block moves upwards, the sucker generates negative pressure to suck the pole piece, the hydraulic part drives the fixing seat to move upwards, the rotary cylinder rotates 90 degrees, the moving part drives the fixing seat to move and is located above the second conveying device, the rotating assembly drives the moving block to move downwards, the sucker is full of gas, the pole piece falls on the second conveying device, and the rotation of the pole piece is completed.

Technical Field

The invention relates to a battery pole piece processing technology, in particular to a pole piece powder brushing machine.

Background

With the widespread use of digital products such as mobile phones and notebook computers, lithium batteries are widely used in such products with excellent performance, and have been gradually developed in recent years to the application fields of other products. The lithium battery pole piece is used as an important part of a lithium battery, and after the lithium battery pole piece is cut, the edges and the surface of the lithium battery pole piece are generally required to be brushed and dedusted so as to remove burrs and dust on the edges and the surface of the lithium battery pole piece.

At present, manufacturers generally brush powder and remove dust on the edge and the surface of a lithium battery pole piece through a lithium battery pole piece brushing machine. Lithium-ion battery pole piece brush dust shaker among the prior art is main including installing in the transport mechanism of frame, the brush of setting in the transport mechanism top, when lithium-ion battery pole piece passes through the below of brush along with transport mechanism, the brush carries out the brush dust removal to lithium-ion battery pole piece's edge and surface, however, this kind of lithium-ion battery pole piece brush dust shaker, when carrying out the brush dust removal to lithium-ion battery pole piece's edge and surface, only carry out the brush dust removal to lithium-ion battery pole piece's edge and surface passively, lead to some stubborn burrs can't drop and the great dust of adsorption affinity can't clear away totally easily, and brush dust removal speed is slow, inefficiency.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides the battery pole piece which has high brushing speed and high efficiency and can better remove burrs and powdery particles.

In order to achieve the purpose, the invention adopts the following technical scheme: a battery pole piece processing technology comprises the following steps:

a. preparing slurry: stirring the slurry by a stirring device, and uniformly dispersing the slurry;

b. coating: coating the prepared slurry on the front and back sides of the current collector metal foil by coating equipment, wherein the coating on the front and back sides of the pole piece is symmetrical;

c. and (3) drying: drying the coated pole piece by using a drying device to obtain a dried electrode structure;

d. rolling: after drying, the pole piece is rolled and compacted by a roller press;

e. slitting: cutting the rolled pole piece into required size by a cutting device;

f. brushing powder: removing burrs and powdery particles generated after the pole pieces are cut from the cut pole pieces through a powder brushing machine;

wherein, the powder brushing machine comprises a first conveying device, a first powder brushing device, a rotating device, a second powder brushing device and a second conveying device, the first powder brushing device comprises a dust collection box arranged on the first conveying device, a dust collection outlet hole arranged at the bottom of the dust collection box, a left support arranged at the upper left side in the dust collection box, a right support arranged at the upper right side in the dust collection box, a left powder brushing part arranged on the left support and a right powder brushing part arranged on the right support, the left powder brushing part and the right powder brushing part have the same structure, the left powder brushing part comprises a rotating shaft, a first rolling brush wheel fixed on the rotating shaft, a driven gear fixed on the rotating shaft and arranged above the first rolling brush wheel, a driving gear horizontally meshed with the driven gear, a first driving part driving the driving gear to rotate, a second rolling brush wheel arranged at the upper part of the left support, a third rolling brush wheel arranged at the lower part of the left support, a first connecting piece and a second connecting piece, one end of the first connecting piece is fixed at the central position of the rotating shaft, the other end of the first connecting piece is fixed at the central position of the second rolling brush wheel, and the first connecting piece and the second connecting piece have the same structure; first driving piece drive driving gear rotates, drive driven gear and rotate, thereby drive first round brush wheel and rotate, carry out the round brush to the pole piece cutting terminal surface of process, through first connecting piece and second connecting piece, drive second round brush wheel and third round brush wheel and rotate, respectively to the pole piece of process above and below the round brush, the dust collection box is collected burr and the likepowder granule of brushing off, accomplish the left side burring and the likepowder granule to the pole piece, right side brush powder portion is to pole piece right side burring and likepowder granule. According to the invention, the driving gear is driven to rotate by the first driving piece, the driven gear is driven to rotate, the first rolling brush wheel rotates, and then the first connecting piece and the second connecting piece are used for rotating the second rolling brush wheel and the third rolling brush wheel, wherein the second rolling brush wheel and the third rolling brush wheel rotate relatively, and meanwhile, the rotating directions of the first rolling brush wheel, the second rolling brush wheel and the third rolling brush wheel are opposite to the running direction of a pole piece, so that the brushing speed is high, the efficiency is high, the first rolling brush wheel is in contact with the gas cutting end surface of the pole piece, and the second rolling brush wheel and the third rolling brush wheel are in contact with the upper surface and the lower surface of the pole piece, so that burrs and powdery particles can be better removed; the dust box sucks brushed dust quickly and discharges the dust from the dust sucking holes at the bottom of the dust box, so that the dust box is prevented from being attached to the surface of the pole piece again.

The stirring revolution speed in the step a is 15-20r/min, the stirring rotation speed is 10-15m/s, and the stirring time is 2-3 h; vortex is caused when raw materials are stirred, stirring speed and stirring effect are influenced, raw materials are uniformly mixed, and performance of pole pieces manufactured subsequently is improved.

The coating speed in the step b is 5m/min, the thickness of the metal foil is 20 microns, and the width of the metal foil is 350 mm; the thickness error of the coated pole piece is small, the processing is convenient, and the overall performance of the pole piece is not influenced.

The drying temperature in the step c is 100-130 ℃; the thickness of the pole piece is small in rebound and good in consistency.

The rolling pressure in the step d is 1-10000kgf, and the rolling speed is 15-50 m/min; avoid pole piece surface particle by the crushing, can reduce the roll pressure of follow-up cold pressing moreover and cancel even cold pressing, can also guarantee the performance of pole piece.

The rotating device comprises a moving piece, a hydraulic piece arranged on the moving piece, a rotating cylinder positioned below the hydraulic piece, a fixed seat arranged on the rotating cylinder, a moving block positioned inside the fixed seat, a fixed column arranged on the moving block, a rotating assembly arranged on the fixed seat, a second driving piece for driving the rotating assembly to rotate, a connecting rod and a plurality of suckers arranged at the bottom of the fixed seat, wherein one end of the connecting rod is rotatably arranged on the fixed column, and the other end of the connecting rod is sleeved on the rotating assembly; the hydraulic part drives the rotary cylinder and the fixing seat to move downwards, the sucker is attached to the pole piece, the second driving part drives the rotating assembly, the moving block moves upwards, the sucker generates negative pressure to suck the pole piece, the hydraulic part drives the fixing seat to move upwards, the rotary cylinder rotates 90 degrees, the moving part drives the fixing seat to move and is located above the second conveying device, the rotating assembly drives the moving block to move downwards, the sucker is full of gas, the pole piece falls on the second conveying device, and the rotation of the pole piece is completed. According to the invention, the sucker is in contact with the pole piece through the hydraulic part, the movable block in the fixed seat is moved up and down through the rotating assembly, the sucker generates negative pressure and positive pressure to suck and put down the pole piece, the sucker and the pole piece are moved up through the hydraulic part, the pole piece positioned above the first conveying device is moved to the position above the second conveying device by the moving part, the pole piece is rotated by 90 degrees through the rotating cylinder to rotate by 90 degrees, so that the rotation of the pole piece is completed, and the dust removal of the other two end faces of the pole piece in the next process is facilitated.

The invention has the following advantages: meanwhile, the rotating directions of the first rolling brush wheel, the second rolling brush wheel and the third rolling brush wheel are opposite to the running direction of the pole piece, so that the brushing speed is high, the efficiency is high, the first rolling brush wheel is in end face contact with the pole piece gas cutting, the second rolling brush wheel and the third rolling brush wheel are in contact with the upper surface and the lower surface of the pole piece, burrs and powdery particles can be well removed, the dust collection box quickly sucks brushed dust and discharges the dust from a dust collection hole at the bottom of the dust collection box, and the phenomenon that the dust is attached to the surface of the pole piece again is avoided.

Drawings

FIG. 1 is a schematic structural view of a powder brushing machine;

FIG. 2 is a schematic cross-sectional view of a first brushing device;

FIG. 3 is an enlarged view taken at A in FIG. 2;

FIG. 4 is a schematic view of a first brushing device in a partial cross-sectional configuration;

FIG. 5 is an enlarged view of FIG. 4 at B;

FIG. 6 is a partial cross-sectional view of a first rotating device;

FIG. 7 is a second partial cross-sectional view of the rotating device;

FIG. 8 is a schematic front view of the first conveyor;

fig. 9 is a schematic cross-sectional view of the first conveying device.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

A battery pole piece processing technology comprises the following steps:

a. preparing slurry: stirring the slurry by a stirring device, and uniformly dispersing the slurry;

b. coating: coating the prepared slurry on the front and back sides of the current collector metal foil by coating equipment, wherein the coating on the front and back sides of the pole piece is symmetrical;

c. and (3) drying: drying the coated pole piece by using a drying device to obtain a dried electrode structure;

d. rolling: after drying, the pole piece is rolled and compacted by a roller press;

e. slitting: cutting the rolled pole piece into required size by a cutting device;

f. brushing powder: removing burrs and powdery particles generated after the pole pieces are cut from the cut pole pieces through a powder brushing machine;

as shown in fig. 1-9, the powder brushing machine in the step f comprises a first conveying device 1, a first powder brushing device 2, a rotating device 3, a second powder brushing device 4 and a second conveying device 5, the first conveying device comprises a fixed frame 10, a third driving piece 11 arranged on the fixed frame, a first shaft 12, a second shaft 13, a third shaft 14 and a fourth shaft 15 are arranged on the fixed frame, the first shaft is connected with a third driving piece, a first conveyor belt 16 wound simultaneously on the first and fourth shafts, a second conveyor belt 17 wound simultaneously on the first and second shafts and located to the left of the first conveyor belt, a third conveyor belt 18 trained about both the first and second axes and positioned to the right of the first conveyor belt, a fourth conveyor belt 19 wound on the third and fourth axes and located to the left of the first conveyor belt, a fifth conveyor belt 100 wound on the third and fourth axes at the same time and positioned at the right side of the first conveyor belt; the third driving piece drives the first shaft to rotate, so that the first conveying belt, the second conveying belt and the third conveying belt operate to drive the second shaft and the fourth shaft to rotate, the fourth shaft rotates to drive the fourth conveying belt and the fifth conveying belt to operate to drive the third shaft to rotate, the pole pieces are simultaneously positioned on the first conveying belt, the second conveying belt and the third conveying belt, when the pole pieces are positioned at the first powder brushing device, the pole pieces are firstly separated from the second conveying belt and the third conveying belt, the first conveying belt drives the pole pieces to continue to move forwards, so that the cutting end faces and the upper and lower surfaces of the pole pieces can be positioned in the first powder brushing device, the pole pieces fall on the fourth conveying belt and the fifth conveying belt after powder brushing is completed, and the pole pieces are stably conveyed to the next working procedure.

Further, the first brushing device 2 comprises a dust collecting box 20 arranged on the first conveying device, a dust collecting outlet 21 arranged at the bottom of the dust collecting box, a left support 22 arranged at the upper left in the dust collecting box, a right support 23 arranged at the upper right in the dust collecting box, a left brushing part 24 arranged on the left support, and a right brushing part 25 arranged on the right support, wherein the left brushing part and the right brushing part have the same structure, the left brushing part comprises a rotating shaft 240, a first rolling brush wheel 241 fixed on the rotating shaft, a driven gear 242 fixed on the rotating shaft and arranged above the first rolling brush wheel, a driving gear 243 horizontally meshed with the driven gear, a first driving part 244 driving the driving gear to rotate, a second rolling brush wheel 245 arranged at the upper part of the left support, a third rolling brush wheel 246 arranged at the lower part, a first connecting part 247 and a second connecting part 248, a plurality of clamping pieces 249 are further arranged on the dust collecting box, the clamping pieces are arranged opposite to each other, the pole piece passes through the gap between the opposite clamping pieces; one end of the first connecting piece is fixed at the central position of the rotating shaft, the other end of the first connecting piece is fixed at the central position of the second rolling brush wheel, and the first connecting piece and the second connecting piece have the same structure; first driving piece drive driving gear rotates, drive driven gear and rotate, thereby it rotates to drive first round brush wheel, carry out the round brush to the pole piece cutting terminal surface of process, through first connecting piece and second connecting piece, it rotates to drive second round brush wheel and third round brush wheel, respectively to the above-mentioned round brush and the following round brush of pole piece of process, the dust collection box is collected burr and the likepowder granule of brushing off, accomplish the left side burring and the likepowder granule to the pole piece, right brush powder portion is to pole piece right side burring and likepowder granule, the back is delivered to the rotary device below to the pole piece through first conveyor.

Further, the rotating device comprises a moving member 30, a hydraulic part 31 arranged on the moving member, a rotating cylinder 32 positioned below the hydraulic part, a fixed seat 33 arranged on the rotating cylinder, a moving block 34 positioned inside the fixed seat, a fixed column 35 arranged on the moving block, a rotating assembly 36 arranged on the fixed seat, a second driving member 37 driving the rotating assembly to rotate, a connecting rod 38 and a plurality of suckers 39 arranged at the bottom of the fixed seat, wherein one end of the connecting rod is rotatably arranged on the fixed column, and the other end of the connecting rod is sleeved on the rotating assembly; the hydraulic part drives the rotary cylinder and the fixing seat to move downwards, the sucker is attached to the pole piece, the second driving part drives the rotating assembly, the moving block moves upwards, the sucker generates negative pressure to suck the pole piece, the hydraulic part drives the fixing seat to move upwards, the rotary cylinder rotates 90 degrees, the moving part drives the fixing seat to move and is located above the second conveying device, the rotating assembly drives the moving block to move downwards, the sucker is full of gas, the pole piece falls on the second conveying device, and the rotation of the pole piece is completed.

Furthermore, the second conveying device and the first conveying device are identical in structure, and the sizes of the second conveying device and the first conveying device are different so as to adapt to the sizes of the rotated pole pieces.

Furthermore, the second brush powder device is the same as the first brush powder device in structure, and the distance between the left brush powder portion and the right brush powder portion is different, so that the width change of the rotated pole piece is adapted. The first driving piece, the second driving piece, the third driving piece, the hydraulic piece and the rotary cylinder are commercially available.