CN111545303A - Ultrasonic ball mill - Google Patents
Ultrasonic ball mill Download PDFInfo
- Publication number
- CN111545303A CN111545303A CN202010523897.1A CN202010523897A CN111545303A CN 111545303 A CN111545303 A CN 111545303A CN 202010523897 A CN202010523897 A CN 202010523897A CN 111545303 A CN111545303 A CN 111545303A
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- CN
- China
- Prior art keywords
- ultrasonic
- ball mill
- grinding
- seat
- balls
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000227 grinding Methods 0.000 claims abstract description 84
- 230000007246 mechanism Effects 0.000 claims abstract description 29
- 239000002002 slurry Substances 0.000 claims abstract description 25
- 238000000498 ball milling Methods 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims description 13
- 238000007599 discharging Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 3
- 238000003801 milling Methods 0.000 claims 7
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 16
- 229910052744 lithium Inorganic materials 0.000 abstract description 16
- 238000005498 polishing Methods 0.000 abstract description 5
- 239000002245 particle Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 6
- 229910001416 lithium ion Inorganic materials 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000000576 coating method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007765 extrusion coating Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C15/12—Mills with at least two discs or rings and interposed balls or rollers mounted like ball or roller bearings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/18—Use of auxiliary physical effects, e.g. ultrasonics, irradiation, for disintegrating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C15/12—Mills with at least two discs or rings and interposed balls or rollers mounted like ball or roller bearings
- B02C2015/126—Mills with at least two discs or rings and interposed balls or rollers mounted like ball or roller bearings of the plural stage type
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention discloses an ultrasonic ball mill, and belongs to the technical field of grinding equipment. The ultrasonic ball mill comprises a shell, a ball milling mechanism, a plurality of ultrasonic mechanisms and a driving motor, wherein the ball milling mechanism comprises an upper grinding disc, a lower grinding seat and a plurality of balls, the lower grinding seat is rotatably arranged in the shell, the upper grinding disc is movably sleeved in the lower grinding seat, and the balls are movably arranged between the upper grinding disc and the lower grinding seat; the ultrasonic mechanisms are all fixedly arranged in the shell, and vibrators of the ultrasonic mechanisms are all fixedly connected to the top of the upper grinding disc; the driving motor is fixedly arranged at the bottom in the shell and used for driving the lower grinding seat to rotate. The ultrasonic ball mill provided by the invention integrates ultrasonic grinding and ball milling, and the ultrasonic mechanism can drive the balls to vibrate at high frequency, so that the collision frequency between the balls is greatly improved, the grinding dead angle is avoided, and the grinding efficiency is improved; the multi-circle ball structure realizes multi-stage polishing of the lithium battery slurry, so that the lithium battery slurry with smaller granularity is obtained.
Description
Technical Field
The invention relates to the technical field of grinding equipment, in particular to an ultrasonic ball mill.
Background
In the manufacture of electrodes of lithium ion batteries, the particle size is a parameter for characterizing the quality of slurry, and the particle size has important influence on the coating process, the rolling process and the battery performance, and theoretically, the smaller the particle size of the slurry is, the better the particle size is. When the particle size of the particles is too large, the stability of the slurry is affected, and sedimentation, poor slurry consistency, and the like occur. The conditions of material blockage, pocking marks after the pole piece is dried and the like can occur in the extrusion coating process, so that the quality problem of the pole piece is caused. In the subsequent rolling procedure, the poor coating part is easily broken and locally micro-cracked due to uneven stress, which causes great harm to the cycle performance, rate capability and safety performance of the battery
For the preparation of lithium battery slurry, although the production technology of small batteries is mature day by day, the consistency control of the batteries is still the technical difficulty of the lithium ion battery production in the production process of the lithium ion batteries, especially for the power lithium ion batteries with large capacity and large power.
How to control the microstructure inside the lithium ion battery is a key technology in the production process of the lithium ion battery. Traditional ball mill leans on the ball collision completely, and the striking frequency is lower, and has the dead angle of polishing when polishing, and the material particle size of polishing out is inhomogeneous, is difficult to reach the operation requirement, and can't satisfy the online preparation of thick liquids, in the production process, need arrange manpower control and reinforced, extravagant labour.
Disclosure of Invention
The invention aims to provide an ultrasonic ball mill, which aims to solve the problems that the conventional ball mill is completely collided by balls during grinding, the impact frequency is low, grinding dead angles exist during grinding, the size of ground material particles is uneven, and the use requirement is difficult to meet.
In order to solve the above technical problems, the present invention provides an ultrasonic ball mill, comprising:
a housing;
the ball milling mechanism comprises an upper grinding disc, a lower grinding seat and a plurality of balls, wherein the lower grinding seat is of a cylinder structure with an opening at one end and is rotatably arranged in the shell, the upper grinding disc is movably sleeved in the lower grinding seat, and the balls are movably arranged between the upper grinding disc and the lower grinding seat;
the ultrasonic mechanisms are fixedly arranged in the shell, and vibrators of the ultrasonic mechanisms are fixedly connected to the top of the upper grinding disc;
and the driving motor is fixedly arranged at the bottom in the shell, and an output shaft of the driving motor is fixedly connected with the bottom of the lower grinding seat.
Optionally, the end face of the inner part of the lower grinding seat is provided with a plurality of annular guide grooves, a plurality of balls are distributed in the guide grooves, and the depth of each guide groove is smaller than the radius of each ball.
Optionally, a feed inlet is formed in the middle of the top of the machine shell, a feed channel is formed in the top of the upper grinding disc, a feed pipe is connected between the feed inlet and the feed channel, and slurry to be ground enters the feed inlet and sequentially passes through the feed pipe and the feed channel to be ground and is sent into the lower grinding seat for grinding.
Optionally, the feed port is connected with an external pump through a hose, and is used for conveying the slurry to be ground to the feed port.
Optionally, the outer wall of the lower grinding seat is provided with a plurality of first discharge holes; the top end of an output shaft of the driving motor penetrates through the material containing box to be fixedly connected with the bottom of the lower grinding seat; the bottom of the material containing box is provided with a second discharge hole, the second discharge hole is fixedly connected with a discharge pipe, and the discharge pipe penetrates through the machine shell.
Optionally, a sealing assembly is arranged at a position where the output shaft of the driving motor passes through the material containing box.
Optionally, the ultrasonic mechanism further includes an ultrasonic generator, a transducer, and an amplitude modulator.
Optionally, the bottom of the casing is further provided with support legs.
The ultrasonic ball mill provided by the invention has the following beneficial effects:
(1) the ultrasonic ball mill integrates ultrasonic grinding and ball milling, and the ultrasonic mechanism can drive the balls to vibrate at high frequency, so that the collision frequency between the balls is greatly improved, grinding dead corners are avoided, and the grinding efficiency is improved;
(2) the multi-circle ball structure of the lower grinding seat can realize multi-stage grinding of lithium battery slurry, so that the lithium battery slurry with smaller granularity is obtained;
(3) the multistage grinding structure of the ultrasonic ball mill can realize the grinding of lithium battery slurry in a short time, so that the whole-process online feeding and grinding mode can be supported, and the grinding efficiency is greatly improved.
Drawings
FIG. 1 is a schematic structural diagram of an ultrasonic ball mill provided by the present invention;
FIG. 2 is a schematic structural view of a lower grinding seat;
fig. 3 is a schematic structural view of the upper grinding disc.
Detailed Description
The ultrasonic ball mill according to the present invention will be described in detail with reference to the accompanying drawings and specific examples. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
Example one
The invention provides an ultrasonic ball mill, the structure of which is shown in figure 1. The ultrasonic ball mill comprises a casing 1, a ball milling mechanism 2, a plurality of ultrasonic mechanisms and a driving motor 4, wherein the ball milling mechanism 2 comprises an upper grinding disc 20, a lower grinding seat 21 and a plurality of balls 22, the lower grinding seat 21 is of a cylinder structure with an opening at one end and is rotatably arranged in the casing 1, the upper grinding disc 20 is movably sleeved in the lower grinding seat 21, and the balls 22 are movably arranged between the upper grinding disc 20 and the lower grinding seat 21; the ultrasonic mechanisms are all fixedly arranged in the machine shell 1, and vibrators 3 of the ultrasonic mechanisms are all fixedly connected to the top of the upper grinding disc 20; the driving motor 4 is fixedly arranged at the bottom in the machine shell 1, and an output shaft of the driving motor 4 is fixedly connected with the bottom of the lower grinding seat 21 and is used for driving the lower grinding seat 21 to rotate. The ultrasonic mechanism further comprises an ultrasonic generator, a transducer and an amplitude modulator (not shown in the figure). The ultrasonic mechanism can drive the ball 22 to vibrate at high frequency, the vibration frequency can reach thousands of times, and the vibration frequency of the ball 22 is greatly improved.
Specifically, referring to fig. 2, the end surface inside the lower grinding seat 21 is provided with a plurality of annular guide grooves 210, a plurality of balls 22 are distributed in the guide grooves 210, and the depth of the guide grooves 210 is smaller than the radius of the balls 22. The guide groove 210 is provided with at least 2 turns on the lower grinding seat 21.
Referring to fig. 3, a feed inlet 10 is formed in the middle of the top of the casing 1, a feed channel 200 is formed in the top of the upper grinding disc 20, a feed pipe 11 is connected between the feed inlet 10 and the feed channel 200, and slurry to be ground enters from the feed inlet 10, passes through the feed pipe 11 and the feed channel 200 in sequence, and is fed into the lower grinding seat 21 for grinding.
When the ball mill is used, the feeding port 10 is connected with an external pump through a hose (not shown in the figure) and used for continuously conveying slurry to be ground to the feeding port 10, so that the whole-process online grinding is realized, and compared with the conventional intermittent feeding mode of the ball mill, the online grinding greatly improves the working efficiency. .
Referring to fig. 1, the outer wall of the lower grinding seat 21 is provided with a plurality of first discharging holes 211; the bottom of the lower grinding seat 21 is also fixedly provided with a material containing box 5, and the top end of an output shaft of the driving motor 4 penetrates through the material containing box 5 to be fixedly connected with the bottom of the lower grinding seat 21; the bottom of the material containing box 5 is provided with a second discharging hole 50, the second discharging hole 50 is fixedly connected with a discharging pipe 51, and the discharging pipe 51 penetrates through the machine shell 1. And a sealing assembly 6 is arranged at the position where the output shaft of the driving motor 4 penetrates through the material containing box 5. The bottom of the casing 1 is also provided with support legs 7 for supporting the casing 1.
The working principle is as follows: an external pump pumps slurry to be ground into the ball milling mechanism 2 through the feed inlet 10, the ball milling mechanism 2 and the ultrasonic mechanism work, and the driving motor 4 drives the lower grinding seat 21 to rotate to grind lithium battery slurry in the lower grinding seat; meanwhile, the ultrasonic mechanism works, the vibrator 3 drives the upper grinding disc 20 to vibrate, and the balls 22 positioned at the bottom of the upper grinding disc vibrate and extrude with each other, so that further grinding of lithium battery slurry is completed. In the rotation process of the lower grinding seat 21, the lithium battery slurry moves to the outer side of the circumference of the lower grinding seat 21 under the action of centrifugal force and is ground again when passing through the balls 22 on the outer ring; until the lithium battery slurry overflows from the circumferential edge of the lower grinding seat 21 and flows out through the first discharge hole 210, the second discharge hole 50 and the discharge pipe 51. The multistage structure of polishing can realize accomplishing the grinding to lithium cell thick liquids in the short time to avoided long-time grinding process in the past to lead to the lithium cell thick liquids high temperature, influenced final thick liquids quality.
The ultrasonic ball mill provided by the invention integrates ultrasonic grinding and ball milling, the multi-circle ball structure of the ball milling mechanism can realize multi-stage grinding of lithium battery slurry, no grinding dead angle exists, and in actual production, the ball milling mechanism with different circles can be selected according to actual requirements so as to realize fine grinding of the lithium battery slurry.
According to the experimental result, the granularity of the lithium battery slurry ground by the ball milling mechanism with 2 circles of balls reaches 100nm, and the problem that the granularity of the lithium battery slurry is too large in practical use is effectively solved.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
Claims (8)
1. An ultrasonic ball mill, characterized in that the ultrasonic ball mill comprises:
a housing (1);
the ball milling mechanism (2) comprises an upper milling disc (20), a lower milling seat (21) and a plurality of balls (22), wherein the lower milling seat (21) is of a cylinder structure with an opening at one end and is rotatably arranged in the casing (1), the upper milling disc (20) is movably sleeved in the lower milling seat (21), and the balls (22) are movably arranged between the upper milling disc (20) and the lower milling seat (21);
the ultrasonic mechanisms are all fixedly arranged in the machine shell (1), and vibrators (3) of the ultrasonic mechanisms are all fixedly connected to the top of the upper grinding disc (20);
the driving motor (4) is fixedly arranged at the bottom in the machine shell (1), and an output shaft of the driving motor (4) is fixedly connected with the bottom of the lower grinding seat (21).
2. An ultrasonic ball mill according to claim 1, characterized in that the end surface of the inside of the lower mill base (21) is provided with a plurality of annular guide grooves (210), a plurality of balls (22) are distributed in the guide grooves (210), and the depth of the guide grooves (210) is smaller than the radius of the balls (22).
3. An ultrasonic ball mill according to claim 1, characterized in that a feed inlet (10) is opened in the middle of the top of the casing (1), a feed channel (200) is opened on the top of the upper grinding disc (20), a feed pipe (11) is connected between the feed inlet (10) and the feed channel (200), and the slurry to be ground enters from the feed inlet (10), passes through the feed pipe (11) and the feed channel (200) in sequence, and is fed into the lower grinding seat (21) for grinding.
4. An ultrasonic ball mill as claimed in claim 3, characterized in that the feed opening (10) is connected to an external pump via a hose for feeding the slurry to be ground to the feed opening (10).
5. An ultrasonic ball mill according to claim 3, characterized in that the outer wall of the lower mill base (21) is provided with a plurality of first discharge holes (211); the bottom of the lower grinding seat (21) is also fixedly provided with a material containing box (5), and the top end of an output shaft of the driving motor (4) penetrates through the material containing box (5) to be fixedly connected with the bottom of the lower grinding seat (21); the bottom of the material containing box (5) is provided with a second discharging hole (50), the second discharging hole (50) is fixedly connected with a discharging pipe (51), and the discharging pipe (51) penetrates through the machine shell (1).
6. An ultrasonic ball mill according to claim 5, characterized in that a sealing assembly (6) is provided at the location where the output shaft of the drive motor (4) passes through the cartridge (5).
7. An ultrasonic ball mill as claimed in claim 1, wherein the ultrasonic mechanism further comprises an ultrasonic generator, a transducer and an amplitude modulator.
8. An ultrasonic ball mill as claimed in claim 1, characterized in that the bottom of the housing (1) is further provided with support legs (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010523897.1A CN111545303A (en) | 2020-06-10 | 2020-06-10 | Ultrasonic ball mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010523897.1A CN111545303A (en) | 2020-06-10 | 2020-06-10 | Ultrasonic ball mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111545303A true CN111545303A (en) | 2020-08-18 |
Family
ID=72001779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010523897.1A Pending CN111545303A (en) | 2020-06-10 | 2020-06-10 | Ultrasonic ball mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111545303A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2082197U (en) * | 1990-10-16 | 1991-08-07 | 承德中药科技开发研究所 | Crusher-grinder |
| CN2611035Y (en) * | 2003-04-22 | 2004-04-14 | 吴文振 | High-pressure raw material pulverization and vertical type ore-grinding machine |
| CN105562161A (en) * | 2014-10-05 | 2016-05-11 | 黑龙江省康格尔科技有限公司 | Ultrasonic wave grinding equipment using electrical control |
| CN107824282A (en) * | 2017-12-18 | 2018-03-23 | 惠州市肆方农业发展有限公司 | A kind of beans crushing and collecting device |
| CN212237518U (en) * | 2020-06-10 | 2020-12-29 | 江苏百航超声科技有限公司 | Ultrasonic ball-milling equipment |
-
2020
- 2020-06-10 CN CN202010523897.1A patent/CN111545303A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2082197U (en) * | 1990-10-16 | 1991-08-07 | 承德中药科技开发研究所 | Crusher-grinder |
| CN2611035Y (en) * | 2003-04-22 | 2004-04-14 | 吴文振 | High-pressure raw material pulverization and vertical type ore-grinding machine |
| CN105562161A (en) * | 2014-10-05 | 2016-05-11 | 黑龙江省康格尔科技有限公司 | Ultrasonic wave grinding equipment using electrical control |
| CN107824282A (en) * | 2017-12-18 | 2018-03-23 | 惠州市肆方农业发展有限公司 | A kind of beans crushing and collecting device |
| CN212237518U (en) * | 2020-06-10 | 2020-12-29 | 江苏百航超声科技有限公司 | Ultrasonic ball-milling equipment |
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