CN112275533B - Coating defoaming device for lithium battery diaphragm - Google Patents
Coating defoaming device for lithium battery diaphragm Download PDFInfo
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- CN112275533B CN112275533B CN202011578228.0A CN202011578228A CN112275533B CN 112275533 B CN112275533 B CN 112275533B CN 202011578228 A CN202011578228 A CN 202011578228A CN 112275533 B CN112275533 B CN 112275533B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
- B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
- B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
- B05C1/0813—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line characterised by means for supplying liquid or other fluent material to the roller
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/0073—Degasification of liquids by a method not covered by groups B01D19/0005 - B01D19/0042
- B01D19/0078—Degasification of liquids by a method not covered by groups B01D19/0005 - B01D19/0042 by vibration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/02—Foam dispersion or prevention
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
- B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
- B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
- B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
- B05C11/1039—Recovery of excess liquid or other fluent material; Controlling means therefor
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Coating Apparatus (AREA)
Abstract
The invention relates to the technical field of diaphragm coating, in particular to a defoaming device for coating a lithium battery diaphragm, which comprises: the feeding box is internally provided with slurry for coating; the ultrasonic defoaming box can emit ultrasonic waves to vibrate the slurry for defoaming; one end of the slurry pump is connected with the feeding box, the other end of the slurry pump is connected with the ultrasonic defoaming box, and the slurry pump can provide power to convey the slurry in the feeding box into the ultrasonic defoaming box; the material box is arranged below the ultrasonic defoaming box, a cavity for containing the slurry is arranged in the material box, one end of the material box is communicated with the ultrasonic defoaming box, and the slurry enters the cavity of the material box from the ultrasonic defoaming box. The defoaming device for coating the lithium battery diaphragm can eliminate bubbles in the slurry, disperse the agglomerated slurry and improve the yield of coating the diaphragm.
Description
Technical Field
The invention relates to the technical field of diaphragm coating, in particular to a defoaming device for coating a lithium battery diaphragm.
Background
As shown in the attached figure 1, a feeding box 1 ' is connected with a material box 4 ', slurry in the feeding box 1 ' is directly conveyed to the material box 4 ', the slurry is in contact with a diaphragm on the surface of an application roller in the material box 4 ', and the application roller rotates to apply the slurry to the surface of the diaphragm. There are disadvantages as follows:
1. when the separator is coated, bubbles are easily generated in the slurry, so that the spot-like missing coating is caused, the uniformity of the coated separator is poor, and the use safety of the battery is further influenced.
2. The slurry is formed by bonding high polymer materials through glue, the slurry is often agglomerated in the coating process, the coating of the diaphragm is uneven, the uniformity of the coated diaphragm is poor, and the use safety of the battery is further influenced.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the problem of lithium battery diaphragm coating fire fighting equipment among the prior art when the coating, produce the bubble easily in the thick liquids, cause the condition of diaphragm coating pore diameter too big or even neglected coating and the thick liquids reunion appears often in the coating process, cause the diaphragm coating uneven, the diaphragm homogeneity is poor, and then influences the security of battery use is solved. The invention provides a defoaming device for coating of a lithium battery diaphragm, which can eliminate bubbles in slurry, disperse and agglomerate the slurry and improve the yield of the diaphragm.
The technical scheme adopted by the invention for solving the technical problems is as follows: a lithium battery diaphragm coating fire fighting equipment includes: the feeding box is internally provided with slurry for coating; the ultrasonic defoaming box can emit ultrasonic waves to enable the slurry to vibrate for defoaming; one end of the slurry pump is connected with the feeding box, the other end of the slurry pump is connected with the ultrasonic defoaming box, and the slurry pump can provide power to convey the slurry in the feeding box into the ultrasonic defoaming box; the material box is arranged below the ultrasonic defoaming box, a cavity for containing the slurry is arranged in the material box, one end of the material box is communicated with the ultrasonic defoaming box, and the slurry enters the cavity of the material box from the ultrasonic defoaming box.
Adopt ultrasonic wave defoaming case to carry out the defoaming, propagate the thick liquids when ultrasonic vibration, can produce cavitation in the thick liquids, because cavitation can produce the impact force, so enable the gas of dissolving in the thick liquids and crush, break away from, the inside a large amount of micro bubbles of thick liquids are broken after gathering into the big bubble, and the produced huge energy of cavitation effect has dispersion effect to the thick liquids simultaneously, and the defoaming is accomplished simultaneously with the homogeneity to can prevent that solid component from producing the sediment in the thick liquids.
Because the height of ultrasonic wave defoaming case is greater than the height of magazine, when the thick liquids flow to the magazine in the ultrasonic wave defoaming case, can adopt gravity transmission, can avoid prior art to adopt the thick liquids pump to transmit thick liquids, cause the thick liquids undulant to lead to coating inhomogeneous.
One side of magazine is provided with the coating roll, and thick liquids in the magazine can coat to the diaphragm on coating roll surface through the rotation of coating roll, the magazine includes:
the coating device comprises a material box body, wherein the material box body is rectangular in appearance, a feed inlet of the material box is formed in the bottom of the material box body, a feed back port of the material box is formed in the top of the material box body, a groove is formed in one side of the material box body in the length direction, a coating roller is correspondingly arranged at the opening of the groove, scraper clamps are arranged on two sides of the opening of the groove, scrapers are clamped by the scraper clamps, the other end of each scraper faces the coating roller, the groove, the coating roller and the two scrapers form a cavity, the feed inlet of the material box and the feed back port of the material box are communicated with the cavity, slurry penetrates through the feed inlet in the bottom of the material box body and enters the cavity, and the slurry is filled;
the bottom of the groove is fixedly provided with an occupying part, any point on the coating roller is set to be A, the distance between the point A and the occupying part is set to be S, the coating roller is supposed to rotate clockwise, and when the point A enters the cavity, the numerical value of the distance S between the point A and the occupying part is changed from large to small and then changed from small to large.
The thick liquids pass the feed inlet of magazine bottom and get into in the cavity, thick liquids contact with the diaphragm on the coating roll in the cavity, the thick liquids that drive the part via the rotation of coating roll constantly coats to the diaphragm on, the thick liquids of another part flow from the feed back mouth at magazine top, guarantee the uniformity of thick liquids outflow order, the thick liquids that can also guarantee the cavity are in full-filling state all the time, thick liquids in the cavity are in full-filling state and not only can be convenient for thick liquids and the diaphragm on the coating roll to contact, the thick liquids in the intracavity are in full-filling state and also can completely cut off the air simultaneously, avoid making thick liquids produce more bubbles because of the entering of air and influence coating quality.
In the application, any point on the coating roller is set as a point A, the distance between the point A and the occupation part is set as S, the coating roller is supposed to rotate clockwise, the point A is turned into the cavity from bottom to top, at the moment, the distance S value between the point A and the occupation part is the largest, the pressure is high at the position, the flow rate of the slurry is low, the bubbles are not changed at the position, then, the distance S value between the point A and the occupation part is reduced from large to small, the pressure is reduced along with the reduction of the pressure, the pressure difference exists, the flow rate of the slurry is increased from slow to fast, the bubbles in the slurry are increased continuously in the process that the flow rate is slow to the acceleration of the flow rate until the bubbles are exploded, the defoaming effect is close to 100%, the slurry without the bubbles is obtained, finally, the distance S value between the point A and the occupation part is increased from small to large again.
The relationship between the pressure and the flow rate can be obtained according to the following Bernoulli equation, wherein P is the pressure of a certain point in the fluid, v is the flow rate of the point of the fluid, ρ is the density of the fluid, g is the gravity acceleration, h is the height of the point, and C is a constant.
Bernoulli's principle is often expressed as: p + rho v = C
That is, the fluid pressure is inversely proportional to its flow rate, with lower pressures giving faster flow rates.
The surface of the occupation part opposite to the coating roller is an arc surface.
The distance between the arc surface vertex B of the occupation part and the vertex C of the arc surface formed in the cavity by the coating roll is 0.1-10 cm.
Because the face that occupation part and coating roll are relative is the arcwall face and coating roll itself is the arcwall face, because be two relative arcwall faces, when A point on the coating roll just rotated to the cavity, the distance of A point to the planar occupation part of arcwall face is the biggest, then, when A point rotated to the summit C of the cambered surface that the coating roll formed in the cavity, the distance of A point to the summit B of the planar occupation part of arcwall face is the minimum, and finally, A point continues to rotate, and the distance of A point to the planar occupation part of arcwall face constantly increases.
The ultrasonic wave defoaming case includes: the slurry feeding device comprises a material box, a material box and a slurry discharging device, wherein a feeding hole is formed in one side of the material box, a discharging hole of the material box is formed in the other side of the material box, the height of the feeding hole of the material box is larger than that of the discharging hole of the material box, and a cavity for containing slurry is formed in the material box;
the ultrasonic wave device, the ultrasonic wave device sets up the below of workbin includes: an ultrasonic vibrator.
The height of the feed inlet of workbin is greater than the height of the discharge gate of workbin, the workbin is when the feed inlet feeding, because the impact force of feeding for the thick liquids of the feed inlet of workbin produce the bubble easily, highly being greater than when the feed inlet of workbin the height of the discharge gate of workbin, and the feed inlet of workbin is in one side of the difference of workbin with the discharge gate of workbin, so impact force during the feeding is little to the influence of the discharge gate of workbin, can ignore.
Ultrasonic device sets up the below at the workbin, the position of the discharge gate of workbin is less than the feed inlet of workbin, be close to mutually with ultrasonic device's position, propagate to the thick liquids when ultrasonic vibration, can produce cavitation in the thick liquids, because cavitation can produce the impact force, so enable the gas pressure of dissolving in the thick liquids broken, break away from, the inside a large amount of micro bubbles of thick liquids, constantly come up, it is broken after gathering into the large bubble, make the bubble in the thick liquids of bottom few, then flow to the magazine in from the discharge gate of workbin.
A slurry overflow outlet is formed above the feed inlet of the feed box, and the volume of the slurry can be controlled to be in a fixed value state. The horizontal height position of the inner wall of the material box along the slurry overflow port is provided with a partition board, the partition board extends downwards to divide the material box into a left open cavity and a right open cavity, and slurry can flow in the two cavities. On two cavitys about the feed inlet of workbin and the discharge gate of workbin are located respectively, when thick liquids enter from the feed inlet of workbin, will produce the impact force of feeding, can separate the influence of the many ejection of compact of impact force that the feeding brought through setting up the baffle, and the thick liquids that get into behind the setting baffle will follow the bottom that the feed inlet of workbin moved to the workbin, flow into another cavity via the discharge gate of workbin by a cavity of workbin after that and flow out, at this in-process, thick liquids motion state becomes the curve of buckling, compare in not adding the baffle, thick liquids are direct to be moved to the discharge gate of workbin by the feed inlet of workbin, can increase the time of thick liquids supersound defoaming, increase defoaming effect.
One side of feed tank is equipped with the feed inlet of feed tank, the opposite side of feed tank is equipped with the feed back mouth of feed tank, the feed back mouth of feed tank highly be greater than the height of the feed inlet of feed tank, the feed inlet of feed tank passes through the thick liquids pump and connects the feed inlet of workbin.
The feed tank is when the feed back, because the impact force of feed back for the easy bubble that produces of thick liquids of the feed back mouth of feed tank, highly being greater than owing to set up the feed back mouth of feed tank the height of the feed back mouth of feed tank, and the discharge gate of feed tank and the feed back mouth of feed tank establish in different one side, so impact force during the feed back is little to the influence of the discharge gate of feed tank, can ignore.
Preferably, the feed back port of the material box is connected with the feed back port of the feed box. One part of the slurry in the material box is coated on the diaphragm, and the other part of the slurry flows back to the material supply box, so that the defoaming and the coating are continuously circulated, and the production cost is saved.
The invention has the beneficial effects that the defoaming device for coating the lithium battery diaphragm has the following specific effects:
according to the invention, the ultrasonic defoaming box is added in the existing lithium battery diaphragm coating defoaming device, bubbles in slurry can be eliminated through a physical principle, the influence of a chemical defoaming agent on the slurry can be avoided, the slurry can be uniformly dispersed, furthermore, the occupying part is arranged in the material box, secondary physical defoaming is carried out, the defoaming rate is close to 100%, in the next coating process, the problems of too large pore diameter of a diaphragm coating layer, even coating leakage and poor quality of the slurry agglomerated coating diaphragm caused by bubbles can be avoided, and the diaphragm with excellent quality can be obtained. The defoaming slurry box disclosed by the invention can improve the uniformity of the diaphragm, so that the thermal stability of the diaphragm is further improved, and the use safety of the diaphragm can be improved when the defoaming slurry box is applied to a lithium battery.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic diagram of a prior art lithium battery separator coating defoaming apparatus;
FIG. 2 is a schematic diagram of a lithium battery diaphragm coating defoaming device of the invention;
FIG. 3 is a side view of a magazine of a lithium battery separator coating defoaming device of the present invention;
fig. 4 is an enlarged view of the spacer opposite to the coating roller in the side view of the cartridge of the lithium battery diaphragm coating defoaming device.
Reference numerals:
the prior art is as follows: 1 ', a feeding box, 4' and a material box;
the application: 1. the device comprises a feeding box, 11, a feeding port of the feeding box, 12, a feed back port of the feeding box, 2, a slurry pump, 3, an ultrasonic defoaming box, 30, a material box, 31, a feeding port of the material box, 32, a discharging port of the material box, 33, an ultrasonic device, 34, an ultrasonic vibrator, 35, a slurry overflow port, 36, a partition plate, 4, a material box, 40, a material box body, 41, a feeding port of the material box, 42, a feed back port of the material box, 43, a groove, 44, a scraper clamp, 45, a scraper, 46, an occupying part, 5 and a coating roller.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
As shown in fig. 2 to 4, which are the most preferred embodiments of the present invention, a defoaming device for coating a lithium battery separator includes:
feed tank 1 is equipped with the thick liquids that are used for the coating in the feed tank 1, and one side of feed tank 1 is equipped with feed port 11 of feed tank, and the opposite side of feed tank 1 is equipped with feed back 12 of feed tank, and feed back 12 of feed tank highly is greater than the height of feed port 11 of feed tank, and feed port 11 of feed tank passes through the feed inlet 31 that thick liquids pump 2 connects the workbin.
Ultrasonic wave defoaming case 3, ultrasonic wave defoaming case 3 can send the ultrasonic wave for thick liquids produce vibration and carry out the defoaming, and ultrasonic wave defoaming case 3 includes:
a feed port 31 of the bin is formed in one side of the bin 30, a discharge port 32 of the bin is formed in the other side of the bin 30, the height of the feed port 31 of the bin is larger than that of the discharge port 32 of the bin, and a cavity for containing slurry is formed in the bin 30; a slurry overflow outlet 35 is formed above a feed inlet 31 of the feed box, a partition plate 36 is arranged on the inner wall of the feed box 30 at the horizontal height position along the slurry overflow outlet 35, the partition plate 36 extends downwards to divide the feed box 30 into a left open cavity and a right open cavity, and slurry can flow in the two cavities.
Ultrasonic device 33, ultrasonic device 33 sets up in the below of workbin 30, includes: an ultrasonic vibrator 34.
One end of the slurry pump 2 is connected with the feeding box 1, the other end of the slurry pump 2 is connected with the ultrasonic defoaming box 3, and the slurry pump 2 can provide power to convey the slurry in the feeding box 1 into the ultrasonic defoaming box 3;
the material box 4 is arranged below the ultrasonic defoaming box 3, a cavity for containing the slurry is arranged in the material box 4, one end of the material box 4 is communicated with the ultrasonic defoaming box 3, and the slurry enters the cavity of the material box 4 from the ultrasonic defoaming box 3. The feed back port 42 of the feed box is connected to the feed back port 12 of the feed box. Wherein, one side of magazine is provided with coating roll 5, and the thick liquids in magazine 4 can coat to the diaphragm on coating roll 5 surface through the rotation of coating roll 5, and magazine 4 includes:
the material box comprises a material box body 40, wherein the material box body 40 is rectangular, a feed inlet 41 of the material box is formed in the bottom of the material box body 40, a feed back 42 of the material box is formed in the top of the material box body 40, a groove 43 is formed in one side of the material box body 40 in the length direction, the coating roller 5 is correspondingly arranged at the opening of the groove 43, scraper clamps 44 are arranged on two sides of the opening of the groove 43, a scraper 45 is clamped by the scraper clamps 44, the other end of the scraper 45 faces the coating roller 5, the groove 43, the coating roller 5 and the two scrapers 45 form a cavity, the feed inlet 41 of the material box and the feed back 42 of the material box are communicated with the cavity, slurry penetrates through the feed inlet 41 of the material box at the bottom of the material box body 40;
the bottom of the groove 43 is also fixedly provided with an occupying part 46, an arbitrary point on the coating roller 5 is set as A, the distance between the point A and the occupying part 46 is set as S, and if the coating roller 5 rotates clockwise, when the point A enters the cavity, the numerical value of the distance S between the point A and the occupying part 46 is changed from large to small and then changed from small to large. The face of the occupation member 46 opposite to the coating roller 5 is an arc face. The distance between the apex B of the arc surface of the occupying member 46 and the apex C of the arc surface formed in the cavity at the coating roller 5 is 0.1 to 10 cm.
The working principle is as follows:
the utility model provides a slurry pump 2 is connected to discharge gate 12 of feed tank of this application, the feed inlet 31 of the workbin of ultrasonic wave defoaming case 3 is connected to the other end of slurry pump 2, slurry pump 2 provides power and carries the thick liquids of feed tank 1 to ultrasonic wave defoaming case 3, the thick liquids carry out the ultrasonic wave defoaming in ultrasonic wave defoaming case 3, propagate the thick liquids as ultrasonic vibration, can produce cavitation in the thick liquids, because cavitation can produce the impact force, so enable the gas pressure of dissolving in the thick liquids and break away from, the inside a large amount of small bubbles of thick liquids, it is broken after gathering into the big bubble, the produced huge energy of cavitation effect has the dispersion effect to the thick liquids simultaneously, the defoaming is accomplished simultaneously with the homogeneity, and can prevent in the thick liquids that solid composition from producing the sediment.
Slurry after defoaming passes through the action of gravity and carries slurry to the feed inlet 41 of the magazine of bottom, is equipped with the occupation part 46 in the magazine 4, and the occupation part can make the slurry that flows in magazine 4 form the process that the velocity of flow accelerates, and the inside a large amount of micro bubbles of slurry are broken after constantly gathering into the large bubble at the acceleration of the velocity of flow in-process to carry out the secondary defoaming, obtain slurry after the defoaming and coating, make the coating even, obtain the diaphragm of good quality.
The top of the material box 4 is also provided with a material box feed back port 42, one part of the slurry in the material box 4 is coated on the diaphragm, and the other part of the slurry flows back to the material supply box, and defoaming and coating are continuously circulated.
The lithium battery diaphragm coating defoaming device has the following specific effects:
according to the invention, the ultrasonic defoaming box 3 is added in the existing lithium battery diaphragm coating defoaming device, bubbles in slurry can be eliminated through a physical principle, the influence of a chemical defoaming agent on the slurry can be avoided, the slurry can be uniformly dispersed, further, the position occupying part 46 is arranged in the material box, secondary physical defoaming is carried out, the defoaming rate is close to 100%, and in the following coating process, the problems of too large pore diameter of a diaphragm coating layer, even coating leakage and poor quality of the slurry agglomerated coating diaphragm caused by bubbles can be avoided, and the diaphragm with excellent quality can be obtained. The defoaming slurry box disclosed by the invention can improve the uniformity of the diaphragm, so that the thermal stability of the diaphragm is further improved, and the use safety of the diaphragm can be improved when the defoaming slurry box is applied to a lithium battery.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (4)
1. A lithium battery diaphragm coating fire fighting equipment which characterized in that includes:
the slurry feeding device comprises a feeding box (1), wherein slurry for coating is arranged in the feeding box (1);
the ultrasonic defoaming box (3) can emit ultrasonic waves, so that the slurry generates vibration to defoam;
one end of the slurry pump (2) is connected with the feeding box (1), the other end of the slurry pump is connected with the ultrasonic defoaming box (3), and the slurry pump (2) can provide power to convey the slurry in the feeding box (1) into the ultrasonic defoaming box (3);
the device comprises a material box (4), wherein the material box (4) is arranged below an ultrasonic defoaming box (3), a cavity for containing slurry is arranged in the material box (4), one end of the material box (4) is communicated with the ultrasonic defoaming box (3), and the slurry enters the cavity of the material box (4) from the ultrasonic defoaming box (3);
wherein, one side of magazine (4) is provided with coating roll (5), and thick liquids in magazine (4) can be coated to the diaphragm on coating roll (5) surface through the rotation of coating roll (5), its characterized in that, magazine (4) includes:
the material box comprises a material box body (40), wherein the material box body (40) is rectangular in appearance, a feed inlet (41) of the material box is formed in the bottom of the material box body (40), a feed back port (42) of the material box is formed in the top of the material box body, a groove (43) is formed in one side of the material box body (40) in the length direction, a coating roller (5) is correspondingly arranged at the opening of the groove (43), scraper clamps (44) are arranged on two sides of the opening of the groove (43), scrapers (45) are clamped by the scraper clamps (44), the other end of each scraper (45) faces towards the coating roller (5), the groove (43), the coating roller (5) and the two scrapers (45) form a cavity, the feed inlet (41) of the material box and the feed back port (42) of the material box are communicated with the cavity, and slurry passes through the feed inlet (41) of the material box at, the slurry is filled in the cavity and is in contact with the diaphragm on the coating roller (5);
the bottom of the groove (43) is also fixedly provided with an occupying part (46), any point on the coating roller (5) is set to be A, the distance between the point A and the occupying part (46) is set to be S, and if the coating roller (5) rotates clockwise, when the point A enters the cavity, the numerical value of the distance S between the point A and the occupying part (46) is changed from big to small and then changed from small to big;
the surface of the occupation part (46) opposite to the coating roller (5) is an arc surface, and the distance between the arc surface vertex B of the occupation part (46) and the vertex C of the arc surface formed in the cavity of the coating roller (5) is 0.1-10 cm;
the ultrasonic defoaming box (3) comprises:
the slurry tank comprises a material tank (30), wherein a material inlet (31) of the material tank is formed in one side of the material tank (30), a material outlet (32) of the material tank is formed in the other side of the material tank (30), the height of the material inlet (31) of the material tank is larger than that of the material outlet (32) of the material tank, and a cavity for containing slurry is formed in the material tank (30);
an ultrasonic device (33), the ultrasonic device (33) being arranged below the magazine (30), comprising: an ultrasonic vibrator (34).
2. The lithium battery diaphragm coating defoaming device of claim 1, wherein a slurry overflow outlet (35) is formed above the feeding port (31) of the bin, a partition plate (36) is arranged at a horizontal height position of the inner wall of the bin (30) along the slurry overflow outlet (35), the partition plate (36) extends downwards to divide the bin (30) into a left cavity and a right cavity which are open, and slurry can flow in the two cavities.
3. The lithium battery diaphragm coating defoaming device of claim 2, characterized in that one side of the feed tank (1) is provided with a feed port (11) of the feed tank, the other side of the feed tank (1) is provided with a feed back port (12) of the feed tank, the height of the feed back port (12) of the feed tank is greater than the height of the feed port (11) of the feed tank, and the feed port (11) of the feed tank is connected with the feed port (31) of the feed tank through a slurry pump (2).
4. The lithium battery diaphragm coating defoaming device of claim 1, characterized in that the feed back opening (42) of the material box is connected with the feed back opening (12) of the material supply box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011578228.0A CN112275533B (en) | 2020-12-28 | 2020-12-28 | Coating defoaming device for lithium battery diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011578228.0A CN112275533B (en) | 2020-12-28 | 2020-12-28 | Coating defoaming device for lithium battery diaphragm |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112275533A CN112275533A (en) | 2021-01-29 |
| CN112275533B true CN112275533B (en) | 2021-04-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104275268A (en) * | 2013-07-02 | 2015-01-14 | 浙江万向亿能动力电池有限公司 | Surface coating device and method for lithium battery pole piece or diaphragm |
| CN107754381A (en) * | 2017-11-07 | 2018-03-06 | 武汉华星光电半导体显示技术有限公司 | Solution bubble removal device and coating machine |
| CN207680889U (en) * | 2017-12-14 | 2018-08-03 | 东莞市壮凌自动化科技有限公司 | A kind of single dovetail type cutter groove of dimple coating |
| CN208485596U (en) * | 2018-06-26 | 2019-02-12 | 珠海恩捷新材料科技有限公司 | A kind of lithium battery diaphragm coating feeding device |
| CN109382277A (en) * | 2018-10-26 | 2019-02-26 | 广东阿博特数码纸业有限公司 | A kind of system for eliminating color spray photo paper bubble |
| CN210045502U (en) * | 2019-04-09 | 2020-02-11 | 江苏卓高新材料科技有限公司 | Coating machine feeding system and coating machine |
| CN211160491U (en) * | 2019-10-25 | 2020-08-04 | 宁德卓高新材料科技有限公司 | Diaphragm coating slurry defoaming buffer system |
| CN111644334A (en) * | 2020-07-07 | 2020-09-11 | 佛山赛和薄膜科技有限公司 | Surface chemical treatment equipment for biaxially oriented film and use method thereof |
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