CN109119590B - Coating method of lithium battery material for laboratory - Google Patents
Coating method of lithium battery material for laboratory Download PDFInfo
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- CN109119590B CN109119590B CN201811014900.6A CN201811014900A CN109119590B CN 109119590 B CN109119590 B CN 109119590B CN 201811014900 A CN201811014900 A CN 201811014900A CN 109119590 B CN109119590 B CN 109119590B
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- 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
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- 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
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- 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
- H01M10/058—Construction or manufacture
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- 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
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
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Abstract
The invention discloses a coating method of lithium battery materials for laboratories, which comprises the steps of positioning an electrode sheet base material for preparing an electrode sheet to a coating platform and coating the positioned electrode sheet base material with lithium battery materials and cutting the lithium battery materials into electrode sheets with required sizes. The electrode plate base material for preparing the electrode plate is clamped and limited up and down on the coating platform, so that the electrode plate base material can be used for a coating procedure under a relatively stable condition, the coating uniformity is guaranteed, the coating effect is good, and the coating quality is improved.
Description
Technical Field
The invention belongs to the technical field of lithium battery production and manufacturing, and particularly relates to a coating method of a lithium battery material for a laboratory.
Background
Lithium batteries are batteries using a nonaqueous electrolyte solution and using a graphite carbon material or other powder materials (such as metal oxide, sulfide, phosphide and other powders) as a negative electrode material. Lithium metal batteries were first proposed and studied by Gilbert n. Lewis in 1912. With the development of science and technology, lithium batteries have become mainstream energy storage devices.
At present, a great deal of researchers are engaged in research and development work of lithium ion battery materials in laboratories. In the process of evaluating the developed battery material by researchers, coating the electrode plate of the lithium battery is an important step in the experimental process of the lithium battery, but the coating process in a common laboratory is manual operation, so that the problems of uneven coating, irregular shape, uncertain size and the like are easily caused. In the manual coating process, generally, according to the actual coating condition, a uniformly coated part is searched for circular cutting, then the cut circular pole piece is subjected to further drying heat treatment, finally, the lithium ion battery pole piece is manufactured for use, and the rest part is discarded as waste. This causes a problem that even if the coating is uniformly applied, a large amount of unusable scraps are generated due to irregular shapes, that is, the coating cannot be formed into a regular circle, and the raw material is wasted.
Chinese patent (CN 107096679A) discloses experimental lithium battery pole piece coating equipment, which comprises a digital display micrometer, a crossbeam body, a coater, a coating platform, a base, a connecting rod and a sliding rod; its advantage lies in, adopts the technique of the vacuum adsorption district that the coating platform region distributes and thick liquids coating district alternate segregation, has avoided the substrate that lies in the adsorption hole position among the coating process because the effect of vacuum negative pressure produces sunkenly, leads to thick liquids thickness to appear the bodiness phenomenon in this position, guarantees the uniformity of thick liquids at whole coating region thickness, and coating platform adopts resistance heating simultaneously, and the stoving pole piece has avoided adopting the inconsistent phenomenon of drying that hot-blast heating stoving leads to after the coating.
When the device is used, the uniformity of the coating position can be better ensured, but the following defects still exist: 1. the adsorption sites cannot be coated, resulting in material waste. 2. The adsorption at the periphery easily causes upward bending deformation at the middle part, also affects the coating uniformity, affects the coating effect and causes poor coating quality. 3. The structure for driving the coating mechanism to slide in a translation manner is complex and inconvenient to use. 4. The battery pole pieces with different thicknesses can not be adjusted, so that the device is poor in applicability.
Therefore, how to provide a coating method of lithium battery materials for laboratories, which can better ensure the uniformity of coating positions, reduce the bending deformation of the materials, effectively reduce the material loss and fully utilize the materials on the premise of utilizing vacuum negative pressure to adsorb and fix the electrode plate materials, and becomes a technical problem to be solved by technical personnel in the field.
Disclosure of Invention
Aiming at the defects of the prior art, the technical problems to be solved by the invention are as follows: how to provide a coating method of lithium battery materials for laboratories which can better ensure the uniformity of coating positions, reduce the bending deformation of the materials on the premise of utilizing vacuum negative pressure to adsorb and fix the electrode plate materials, effectively reduce the material loss and fully utilize the materials, and becomes a technical problem to be solved by technical personnel in the field.
In order to solve the technical problems, the invention adopts the following technical scheme:
a coating method of lithium battery materials for laboratories comprises the steps of positioning an electrode sheet substrate for preparing an electrode sheet to a coating platform and coating the positioned electrode sheet substrate with the lithium battery materials and cutting the electrode sheet substrate into electrode sheets with required sizes.
If the electrode plate base material is limited in the vertical direction, the vacuum negative pressure required to be generated in a vacuum adsorption mode below the electrode plate base material is larger, so that the electrode plate base material is easy to bend and deform, and the coating effect is influenced; if the electrode plate base materials are only clamped and limited by the clamping structures on the two sides of the coating area, the electrode plate base materials used in the lithium battery coating process have certain flexibility, and the electrode plate base materials can be arched towards the middle part of the lithium battery by only clamping and limiting, so that the coating effect is influenced.
The method of the invention clamps and limits the electrode plate base material for preparing the electrode plate on the coating platform, and limits the electrode plate base material up and down, so that the electrode plate base material can be used for the coating process under a relatively stable condition, thus ensuring the coating uniformity, ensuring the coating effect to be good and improving the coating quality.
The method is realized by adopting the following coating equipment, wherein the coating equipment comprises a coating platform, the coating platform is provided with an upward positioning surface which is horizontally arranged, a coating device is arranged above the positioning surface, the coating device can be horizontally and movably arranged on the coating platform by virtue of a translation control mechanism, a vacuum adsorption area and a coating area are arranged on the coating platform, an electrode plate positioning structure is also arranged on the coating platform, the electrode plate positioning structure comprises a plurality of air suction holes which are positioned in the vacuum adsorption area, the vacuum adsorption area and the coating area are arranged in a superposition manner, the air suction holes are uniformly distributed in the coating area in an array manner, the electrode plate positioning structure also comprises clamping plates which are positioned at two sides of the coating area, the clamping plates are used for clamping and fixing the electrode plates to be coated, and the electrode plate positioning structure also comprises clamping plates which are positioned at two sides of the coating area, the clamping plate is used for clamping and fixing the electrode slice to be coated.
In this way, after the air suction holes are divided into a plurality of air suction holes which are arranged in an array, the suction force of a single air suction hole is reduced, and meanwhile, the electrode plate is made of a metal material and has certain hardness, so that the electrode plate cannot deform when being sucked after the air suction holes which are arranged in the array are adopted; meanwhile, the electrode plates are clamped and fixed at two sides of the coating area by the clamping plates, the air suction holes only need a small suction force to realize the vertical freedom degree limitation of the electrode plates, the horizontal freedom degree effect is provided by the clamping plates, and the horizontal limitation is realized without depending on the friction force generated by the suction force. Therefore, the requirement of the suction force can be further reduced, the material deformation caused by the suction force can be better prevented, and the load of the negative pressure generating device is also reduced.
Further, the diameter of the air suction hole is less than 1.3 mm.
Thus, the electrode plate above the electrode plate can be better ensured not to deform due to air suction.
Furthermore, an air suction cavity is arranged in the coating platform below the positioning surface, a negative pressure generating device is arranged in the air suction cavity, and a plurality of air outlet holes arranged at intervals are further formed in the bottom of the air suction cavity.
Therefore, the negative pressure is generated by the negative pressure generating device, the electrode plate is firmly fixed on the positioning surface of the coating platform through the air suction hole, and the electrode plate is fixed and cannot generate displacement when a coating process is carried out, so that the coating quality and the working efficiency are improved; meanwhile, the air outlet releases a part of air, so that the pressure in the air suction cavity is balanced, and the load of the negative pressure generation device is prevented from being too large.
Furthermore, a plurality of heating sheets are fixedly arranged on the top cavity wall of the air suction cavity, and one heating sheet is arranged on the top cavity wall of the air suction cavity between two adjacent air suction holes.
Thus, the coating platform is heated by the heating sheet, and the coating process is conveniently and smoothly carried out.
Further, splint deviate from the outside in coating district still is provided with splint guiding mechanism, splint guiding mechanism includes limiting plate and push control component, the limiting plate is parallel splint set up, push control component level sets up and runs through perpendicularly the limiting plate and extend with splint connect.
Like this, the limiting plate is spacing to splint, prevents outside splint roll-off coating platform.
Further, the pushing control member is a bolt, and the pushing control member penetrates through the limiting plate in a threaded mode.
Therefore, the sliding of the clamping plate at the end part of the pushing control component can be controlled by rotating the pushing control component outside the coating platform, the pushing control component pushes the clamping plate to perform sliding displacement more conveniently, and the device is simple in structure and easy to realize.
Furthermore, the translational control mechanism comprises sliding chutes arranged on two opposite sides of the positioning surface and a frame body capable of sliding in the sliding chutes, the frame body is provided with two vertical sections and a horizontal section, two ends of the horizontal section are fixedly connected with the upper ends of the vertical sections respectively, and the lower ends of the vertical sections are arranged in the sliding chutes in a sliding fit manner.
Like this, through the support body in the slip of locating surface spout, better control lithium cell coating shape and size make the even and coating shape of coating more regular, make things convenient for subsequent handling to tailor of electrode slice, make full use of material effectively reduces the material loss.
Further, the sliding groove is formed in the upper surface of the limiting plate, the pushing control member penetrates through the limiting plate, and the horizontal height of the pushing control member is lower than that of the bottom of the sliding groove.
Thus, the pushing control component does not penetrate through the sliding groove and does not influence the sliding of the rack body on the sliding groove.
Furthermore, the bottom of the sliding groove extends to two sides along the horizontal direction respectively so that the vertical section of the sliding groove is formed into an inverted T-shaped structure, and the lower end of the vertical section of the frame body is formed into a structure matched with the sliding groove for clamping.
Like this, the cooperation simple structure of spout and the vertical section lower extreme of support body realizes the slip function of support body on the spout easily to prevent that the support body from following the interior roll-off of spout, control lithium cell coating shape and size that can be better.
Further, the coating device comprises a storage box arranged on the frame body and used for storing lithium battery materials and a coating roller arranged below the storage box, wherein a discharge hole is formed in the bottom of the storage box so that the materials in the storage box slide down on the coating roller, and the coating roller is horizontally arranged and the circumferential lower surface of the coating roller is exposed out of the discharge hole; the upper end of the storage box is arranged on the frame body through a height adjusting device.
Through setting up height adjusting device, the difference in height of regulation control coating device and coating platform makes the device more nimble, and application scope is wide.
Further, the height adjusting device comprises an adjusting chamber arranged between the horizontal section of the frame body and the coating device, the top end of the adjusting chamber is slidably connected with the horizontal section of the frame body, the height adjusting device also comprises two screw rods vertically arranged at intervals, the upper end of each screw rod extends into the adjusting chamber and is fixedly sleeved with a first bevel gear respectively, a second bevel gear is meshed between the two first bevel gears, the axial direction of the second bevel gear is vertical to the axial direction of the first bevel gear, the height adjusting device also comprises a connecting block sleeved on the two screw rods below the adjusting chamber and capable of moving along the length direction of the screw rods, two threaded holes respectively sleeved with the screw rods in a threaded manner are arranged on the connecting block, the bottom of the connecting block is connected with the top of the coating device through a downward connecting rod piece, the second bevel gear shaft is fixedly connected with a handle extending out of the adjusting chamber.
Therefore, an experimenter rotates the second bevel gear through rotating the handle to drive the two first bevel gears meshed with the second bevel gear to rotate, the screw rod sleeved outside the first bevel gear rotates, the connecting block is sleeved with the lower threads of the screw rod and moves up and down along with the rotation of the screw rod, the movement of the connecting block drives the coating device to move up and down through the connecting rod piece, the height adjusting effect is achieved, the transmission structure does not need to be provided with a guide rail independently, and the transmission is balanced and stable; meanwhile, the adjusting chamber protects the height adjusting device inside the adjusting chamber, and the influence of factors outside the adjusting chamber on the height adjusting device is reduced; in addition, the handle is convenient to carry out the cooperation transmission to first bevel gear and second bevel gear still, makes the high adjustment function of coating equipment better realize.
Furthermore, the upper end of the coating device is provided with a sliding fit part, and the sliding fit part can be connected with the bottom of the horizontal section in a sliding manner along the length direction of the horizontal section of the rack body.
Like this, the slip of coating device on the support horizontal segment, control lithium cell coating shape and size that can be better make the coating even and the coating shape is more regular, makes things convenient for subsequent handling to tailor of coating substrate, and make full use of material effectively reduces the material and decreases.
Furthermore, the concave track groove is seted up to the bottom of horizontal segment, the top in track groove extends to both sides along the horizontal direction respectively so that the perpendicular section in track groove takes shape to T shape structure, the top of regulating chamber through fixed the slider that upwards sets up with track groove sliding connection, the slider constitutes sliding fit portion, slider sliding connection the tip of track groove take shape to be with the structure of track groove cooperation screens.
Like this, coating device can slide on the horizontal segment of support body to the cooperation simple structure of track groove and slider prevents that the slider from following the interior roll-off of track inslot, can further better control lithium cell coating shape and size, and simple structure does benefit to the realization.
Furthermore, the coating device is provided with a mounting hole for the connecting rod piece to be inserted from the upper part of the top of the coating device, wherein the connecting rod piece is a threaded rod piece, and the inner wall of the cavity of the mounting hole is provided with threads matched with the connecting rod piece.
Like this, coating device just can dismantle, is convenient for change the storage box of equidimension not, and then adjustment coating size.
Drawings
FIG. 1 is a schematic view of a coating apparatus employing the method of the present invention.
Fig. 2 is a schematic top view of a coating apparatus using the method of the present invention.
Fig. 3 is an enlarged view at a in fig. 1 of the present invention.
Fig. 4 is a left side view schematically showing a coating apparatus of a coating apparatus using the method of the present invention.
FIG. 5 is a schematic view of the vertical cross-section of the connection between the lower end of the frame body and the chute of the coating apparatus using the method of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
In the specific implementation: as shown in fig. 1 to 5, a coating method of lithium battery materials for laboratories includes a step of positioning an electrode sheet substrate for preparing an electrode sheet to a coating platform 1, and a step of coating the electrode sheet substrate with lithium battery materials after positioning and cutting the electrode sheet substrate into electrode sheets with required size, and is characterized in that when the electrode sheet substrate is positioned, the electrode sheet substrate is limited in the vertical direction by means of vacuum adsorption from the lower part of the electrode sheet substrate, and the electrode sheet substrate is limited in the two sides perpendicular to the coating direction by means of clamping structures positioned on the two sides of the coating area above the coating platform 1.
If the electrode plate base material is limited in the vertical direction, the vacuum negative pressure required to be generated in a vacuum adsorption mode below the electrode plate base material is larger, so that the electrode plate base material is easy to bend and deform, and the coating effect is influenced; if the electrode plate base materials are only clamped and limited by the clamping structures on the two sides of the coating area, the electrode plate base materials used in the lithium battery coating process have certain flexibility, and the electrode plate base materials can be arched towards the middle part of the lithium battery by only clamping and limiting, so that the coating effect is influenced.
The method of the invention clamps and limits the electrode plate base material for preparing the electrode plate on the coating platform, and limits the electrode plate base material up and down, so that the electrode plate base material can be used for the coating process under a relatively stable condition, thus ensuring the coating uniformity, ensuring the coating effect to be good and improving the coating quality.
The method of this example is implemented using the coating apparatus shown in fig. 1 to 5, which comprises a coating platform 1, the coating platform 1 is provided with an upward positioning surface 11 which is horizontally arranged, a coating device 4 is arranged above the positioning surface 11, the coating device 4 is horizontally movably arranged on the coating platform 1 by means of a translation control mechanism 3, the coating platform 1 is provided with a vacuum adsorption area and a coating area, the coating platform 1 is also provided with an electrode plate positioning structure 2, the electrode plate positioning structure 2 comprises an air suction hole 21 positioned in a vacuum adsorption area, the vacuum adsorption area and the coating area are overlapped, the suction holes 21 are uniformly distributed in the coating area in an array manner, the electrode plate positioning structure 2 further comprises clamping plates 22 positioned on two sides of the coating area, and the clamping plates 22 are used for clamping and fixing the electrode plates to be coated.
In this way, after the air suction holes are divided into a plurality of air suction holes which are arranged in an array, the suction force of a single air suction hole is reduced, and meanwhile, the electrode plate is made of a metal material and has certain hardness, so that the electrode plate cannot deform when being sucked after the air suction holes which are arranged in the array are adopted; meanwhile, the electrode plates are clamped and fixed at two sides of the coating area by the clamping plates, the air suction holes only need a small suction force to realize the vertical freedom degree limitation of the electrode plates, the horizontal freedom degree effect is provided by the clamping plates, and the horizontal limitation is realized without depending on the friction force generated by the suction force. Therefore, the requirement of the suction force can be further reduced, the material deformation caused by the suction force can be better prevented, and the load of the negative pressure generating device is also reduced.
Furthermore, the diameter range of the air suction holes is between 0.5mm and 1.3 mm.
Like this, when the suction opening diameter is less than 1.3mm, can guarantee better that the breathing in can not cause the deformation of the electrode slice of top, when the suction opening diameter is greater than 0.5mm, avoided the suction opening too intensive in the distribution on the coating platform, reduced the material loss.
Further, a suction cavity 13 is arranged inside the coating platform 1 below the positioning surface 11, a negative pressure generating device 14 is arranged in the suction cavity 13, and a plurality of air outlet holes 15 arranged at intervals are further formed in the bottom of the suction cavity 13.
Therefore, the negative pressure is generated by the negative pressure generating device, the electrode plate is firmly fixed on the positioning surface of the coating platform through the air suction hole, and the electrode plate is fixed and cannot generate displacement when a coating process is carried out, so that the coating quality and the working efficiency are improved; meanwhile, the air outlet releases a part of air, so that the pressure in the air suction cavity is balanced, and the load of the negative pressure generation device is prevented from being too large.
Furthermore, a plurality of heating sheets 16 are fixedly arranged on the top cavity wall of the air suction cavity 13, and one heating sheet 16 is arranged on the top cavity wall of the air suction cavity 13 between two adjacent air suction holes 21.
Thus, the coating platform is heated by the heating sheet, and the coating process is conveniently and smoothly carried out.
Further, the splint 22 deviates from the outside in coating district still is provided with splint guiding mechanism 23, splint guiding mechanism 23 includes limiting plate 231 and promotion control member 232, limiting plate 231 is parallel splint 22 sets up, promotion control member 232 level sets up and runs through perpendicularly limiting plate 231 and extension with splint 22 connects.
Like this, the limiting plate is spacing to splint, prevents outside splint roll-off coating platform.
Further, the push control member 232 is a bolt, and the push control member 232 is threaded through the position-limiting plate 231.
Thus, by rotating the push control member 232 outside the coating platform 1, the sliding of the clamping plate 22 at the end of the push control member 232 can be controlled, the push control member 232 can push the clamping plate 22 to perform sliding displacement more conveniently, and the structure is simple and easy to realize.
Meanwhile, the displacement of the clamping plate can be more conveniently controlled by utilizing the pushing control component, and the structure is simple and easy to realize.
Further, the translation control mechanism 3 includes sliding grooves 31 disposed on two opposite sides of the positioning surface 11 and a frame body 32 capable of sliding in the sliding grooves 31, the frame body 32 has two vertical sections 321 and a horizontal section 322 having two ends respectively fixed to the upper ends of the vertical sections 321, and the lower ends of the vertical sections 321 are slidably disposed in the sliding grooves 31.
Like this, through the support body in the slip of locating surface spout, better control lithium cell coating shape and size make the even and coating shape of coating more regular, make things convenient for subsequent handling to tailor of electrode slice, make full use of material effectively reduces the material loss.
Further, the sliding chute 31 is opened on the upper surface of the limiting plate 231, the pushing control member 232 penetrates through the limiting plate 231, and the horizontal height of the pushing control member 232 is lower than the horizontal height of the bottom of the sliding chute 31.
Thus, the pushing control component does not penetrate through the sliding groove and does not influence the sliding of the rack body on the sliding groove.
Further, the bottom of the sliding groove 31 extends to two sides along the horizontal direction respectively so that the vertical section of the sliding groove 31 is formed into an inverted T-shaped structure, and the lower end of the vertical section 321 of the frame body 32 is formed into a structure matched with the sliding groove 31 for clamping.
Like this, the cooperation simple structure of spout and the vertical section lower extreme of support body realizes the slip function of support body on the spout easily to prevent that the support body from following the interior roll-off of spout, control lithium cell coating shape and size that can be better.
Further, the coating device 4 includes a storage box 41 disposed on the frame 32 and used for storing lithium battery materials, and a coating roller 42 disposed below the storage box 41, a discharge hole is formed in the bottom of the storage box 41 so that the materials inside the storage box 41 slide on the coating roller 42, and the coating roller 42 is horizontally disposed and the circumferential lower surface of the coating roller is exposed out of the discharge hole; the upper end of the storage box 41 is arranged on the frame body 32 through the height adjusting device 5.
Through setting up height adjusting device, the difference in height of regulation control coating device and coating platform makes coating equipment more nimble, and application scope is wide.
Further, the height adjusting device 5 includes an adjusting chamber 51 disposed between the horizontal section 322 of the rack 32 and the coating device 4, the top end of the adjusting chamber 51 is slidably connected to the horizontal section 322 of the rack 32, the height adjusting device 5 further includes two screws 52 disposed at a vertical interval, the upper end of each screw 52 extends into the adjusting chamber 51 and is respectively and fixedly sleeved with a first bevel gear 53, a second bevel gear 54 is disposed between the two first bevel gears 53 in a meshing manner, the axial direction of the second bevel gear 54 is perpendicular to the axial direction of the first bevel gear 53, the height adjusting device further includes a connecting block 55 sleeved on the two screws 52 below the adjusting chamber 51 and capable of moving along the length direction of the screws 52, two threaded holes for being respectively in threaded connection with each screw 52 are disposed on the connecting block 55, the bottom of the connecting block 55 is connected to the top of the coating device 4 through a downward connecting rod 56, a handle 57 extending out of the adjustment chamber 51 is fixedly connected to the second bevel gear 54 in the axial direction.
Therefore, an experimenter rotates the second bevel gear through rotating the handle to drive the two first bevel gears meshed with the second bevel gear to rotate, the screw rod sleeved outside the first bevel gear rotates, the connecting block is sleeved with the lower threads of the screw rod and moves up and down along with the rotation of the screw rod, the movement of the connecting block drives the coating device to move up and down through the connecting rod piece, the height adjusting effect is achieved, the transmission structure does not need to be provided with a guide rail independently, and the transmission is balanced and stable; meanwhile, the adjusting chamber protects the height adjusting device inside the adjusting chamber, and the influence of factors outside the adjusting chamber on the height adjusting device is reduced; in addition, the handle is convenient to carry out the cooperation transmission to first bevel gear and second bevel gear still, makes the high adjustment function of coating equipment better realize.
Further, the upper end of the painting device 4 has a sliding fit portion, and the sliding fit portion is slidably connected with the bottom of the horizontal section 322 along the length direction of the horizontal section 322 of the rack 32.
Like this, the slip of coating device on the support horizontal segment, control lithium cell coating shape and size that can be better make the coating even and the coating shape is more regular, makes things convenient for subsequent handling to tailor of coating substrate, and make full use of material effectively reduces the material and decreases.
Further, an inward concave track groove (not shown) is formed in the bottom of the horizontal section 322, the top of the track groove extends to two sides along the horizontal direction respectively so that the vertical section of the track groove is formed into a T-shaped structure, the top end of the adjusting chamber 51 is slidably connected with the track groove through a sliding piece 58 which is fixedly arranged upwards, the sliding piece 58 forms the sliding fit portion, and the sliding piece 58 is slidably connected with the end portion of the track groove and is formed into a structure which is matched with the track groove for clamping.
Like this, coating device can slide on the horizontal segment of support body to the cooperation simple structure of track groove and slider prevents that the slider from following the interior roll-off of track inslot, can further better control lithium cell coating shape and size, and simple structure does benefit to the realization.
Furthermore, a mounting hole for inserting the connecting rod piece 56 from the top of the coating device 4 is formed in the coating device 4, wherein the connecting rod piece 56 is a threaded rod piece, and threads matched with the connecting rod piece are arranged on the inner wall of the cavity of the mounting hole.
Like this, coating device just can dismantle, is convenient for change the storage box of equidimension not, and then adjustment coating size.
In practice, the negative pressure generating device 14 may be a suction fan, which is convenient for realizing the function of adsorbing the electrode plate, but is not limited thereto, and may be adjusted according to actual conditions.
In practice, the bottom of the coating platform 1 is connected with a moving wheel 12, which facilitates the movement of the coating platform 1.
Claims (4)
1. A coating method of lithium battery materials for laboratories comprises the steps of positioning an electrode sheet substrate for preparing an electrode sheet to a coating platform, and coating the positioned electrode sheet substrate with lithium battery materials and cutting the electrode sheet substrate into electrode sheets with required sizes, and is characterized in that when the electrode sheet substrate is positioned, the electrode sheet substrate is limited in the vertical direction by means of vacuum adsorption from the lower part of the electrode sheet substrate, and the electrode sheet substrate is clamped and limited in two sides perpendicular to the coating direction by clamping structures on two sides of a coating area above the coating platform;
the method is realized by adopting the following coating equipment, wherein the coating equipment comprises a coating platform, the coating platform is provided with an upward positioning surface which is horizontally arranged, a coating device is arranged above the positioning surface, the coating device can be horizontally and movably arranged on the coating platform by virtue of a translation control mechanism, the coating device comprises a storage box which is arranged on a frame body and used for storing lithium battery materials and a coating roller which is arranged below the storage box, the bottom of the storage box is provided with a discharge hole so that the materials in the storage box slide on the coating roller, and the coating roller is horizontally arranged and the circumferential lower surface of the coating roller is exposed out of the discharge hole; the upper end of the storage box is arranged on the frame body through a height adjusting device; the height adjusting device comprises an adjusting chamber arranged between the horizontal section of the frame body and the coating device, the top end of the adjusting chamber is slidably connected with the horizontal section of the frame body, the height adjusting device also comprises two screw rods which are vertically arranged at intervals, the upper end of each screw rod extends into the adjusting chamber and is respectively fixedly sleeved with a first bevel gear, a second bevel gear is meshed between the two first bevel gears, the axial direction of the second bevel gear is vertical to the axial direction of the first bevel gear, the height adjusting device also comprises two connecting blocks which are sleeved on the two screw rods below the adjusting chamber and can move along the length direction of the screw rods, two threaded holes which are respectively in threaded sleeve connection with the screw rods are arranged on the connecting blocks, the bottom of each connecting block is connected with the top of the coating device through a downward connecting rod piece, the second bevel gear shaft is upwards fixedly connected with a handle extending out of the adjusting chamber;
the coating platform is provided with a vacuum adsorption area and a coating area, the coating platform is also provided with an electrode plate positioning structure, the electrode plate positioning structure comprises a plurality of air suction holes positioned in the vacuum adsorption area, the vacuum adsorption area and the coating area are arranged in a superposition manner, the air suction holes are uniformly distributed in the coating area in an array manner, the electrode plate positioning structure also comprises clamping plates positioned at two sides of the coating area, and the clamping plates are used for clamping and fixing an electrode plate to be coated; a suction cavity is arranged in the coating platform below the positioning surface, a negative pressure generating device is arranged in the suction cavity, and a plurality of air outlet holes arranged at intervals are formed in the bottom of the suction cavity; the top cavity wall of the air suction cavity is fixedly provided with a plurality of heating sheets, and one heating sheet is arranged on the top cavity wall of the air suction cavity between two adjacent air suction holes;
the outer side of the clamping plate, which is far away from the coating area, is also provided with a clamping plate adjusting mechanism, the clamping plate adjusting mechanism comprises a limiting plate and a pushing control component, the limiting plate is arranged in parallel with the clamping plate, and the pushing control component is horizontally arranged, vertically penetrates through the limiting plate and extends to be connected with the clamping plate; the pushing control component is a bolt, and a thread of the pushing control component penetrates through the limiting plate;
the translational control mechanism comprises sliding chutes arranged on two opposite sides of the positioning surface and a frame body capable of sliding in the sliding chutes, the frame body is provided with two vertical sections and a horizontal section, two ends of the horizontal section are fixedly connected with the upper ends of the vertical sections respectively, and the lower ends of the vertical sections are arranged in the sliding chutes in a sliding fit manner;
the sliding groove is formed in the upper surface of the limiting plate, the pushing control component penetrates through the limiting plate, and the horizontal height of the pushing control component is lower than that of the bottom of the sliding groove; the bottom of the sliding groove extends to two sides along the horizontal direction respectively so as to enable the vertical section of the sliding groove to be formed into an inverted T-shaped structure, and the lower end of the vertical section of the frame body is formed into a structure matched with the sliding groove for clamping.
2. The method for coating lithium battery material for laboratories according to claim 1, wherein the diameter of said air suction holes is less than 1.3 mm.
3. The coating method of lithium battery materials for laboratories as claimed in claim 1, wherein the coating device has a sliding fit part at the upper end, and the sliding fit part is connected with the bottom of the horizontal section in a manner of sliding along the length direction of the horizontal section of the rack body;
the utility model discloses a rail groove of indent, including horizontal section, regulation room, track groove, fixed slider, slider sliding connection, the track groove's bottom is seted up the track groove of indent, the top in track groove extends to both sides so that along the horizontal direction respectively the perpendicular section in track groove takes shape to T shape structure, the top of regulation room through fixed the slider that upwards sets up with track groove sliding connection, the slider constitutes sliding connection portion, slider sliding connection the tip in track groove take shape to be with the structure of track groove cooperation screens.
4. The method for coating lithium battery materials for laboratories as claimed in claim 1, wherein the coating device is provided with a mounting hole for inserting the connecting rod member from above the top of the coating device, wherein the connecting rod member is a threaded rod member, and the inner wall of the cavity of the mounting hole is provided with threads matched with the connecting rod member.
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| CN116511008B (en) * | 2023-05-04 | 2024-02-27 | 浙江宝鸿新材料股份有限公司 | Production method and continuous production line of fingerprint-resistant hairline stainless steel plate |
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