CN115995656A - Preparation method and coating device of lithium ion battery diaphragm - Google Patents
Preparation method and coating device of lithium ion battery diaphragm Download PDFInfo
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- CN115995656A CN115995656A CN202310291708.6A CN202310291708A CN115995656A CN 115995656 A CN115995656 A CN 115995656A CN 202310291708 A CN202310291708 A CN 202310291708A CN 115995656 A CN115995656 A CN 115995656A
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- lithium ion
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- 239000011248 coating agent Substances 0.000 title claims abstract description 63
- 238000000576 coating method Methods 0.000 title claims abstract description 63
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 230000007246 mechanism Effects 0.000 claims abstract description 84
- 238000004804 winding Methods 0.000 claims abstract description 15
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 230000000007 visual effect Effects 0.000 claims abstract description 14
- 230000000670 limiting effect Effects 0.000 claims description 97
- 230000000903 blocking effect Effects 0.000 claims description 21
- 239000002002 slurry Substances 0.000 claims description 16
- 238000003825 pressing Methods 0.000 claims description 14
- 238000005266 casting Methods 0.000 claims description 12
- 239000003973 paint Substances 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 10
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 9
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- 239000004698 Polyethylene Substances 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000000155 melt Substances 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 6
- 239000002033 PVDF binder Substances 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 3
- 239000012982 microporous membrane Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000007781 pre-processing Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 125000006850 spacer group Chemical group 0.000 claims 2
- 239000007788 liquid Substances 0.000 claims 1
- 238000005507 spraying Methods 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052744 lithium Inorganic materials 0.000 abstract description 6
- 238000007590 electrostatic spraying Methods 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000000889 atomisation Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 230000003028 elevating effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005686 electrostatic field Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
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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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- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention relates to the technical field of lithium battery processing, and discloses a preparation method and a coating device of a lithium ion battery diaphragm, wherein the preparation method comprises the following steps: the device comprises a conveying platform, a coating mechanism, a control module, a winding mechanism, a conveying module, a temperature control module, a visual detection module and an unreeling mechanism; the coating mechanism is arranged in the middle of the top end of the conveying platform; the two conveying modules are respectively arranged at the left side and the right side of the top end of the conveying platform. According to the preparation method and the coating device for the lithium ion battery diaphragm, the electrostatic spraying range of the lithium ion battery diaphragm can be adjusted, the spraying range can be controlled, when the edge position of a workpiece of the spraying diaphragm is processed, the spraying range is controllably shielded to control the spraying range of the coating, unnecessary production waste is avoided, and the production cost of the lithium ion battery diaphragm is reduced.
Description
Technical Field
The invention relates to the technical field of lithium battery processing, in particular to a preparation method and a coating device of a lithium ion battery diaphragm.
Background
In the structure of the lithium battery, the diaphragm is one of key inner layer components, the performance of the diaphragm determines the interface structure, internal resistance and the like of the battery, the characteristics of capacity, circulation, safety performance and the like of the battery are directly influenced, the diaphragm with excellent performance has important effects on improving the comprehensive performance of the battery, the diaphragm mainly has the effects of separating the positive electrode from the negative electrode of the battery and preventing the contact between the two electrodes from being short-circuited, and also has the function of enabling electrolyte ions to pass through, the diaphragm material is non-conductive, the physical and chemical properties of the diaphragm have great influence on the performance of the battery, the types of the battery are different, the adopted diaphragm is different, for the lithium battery series, the electrolyte is an organic solvent system, so that the diaphragm material with high strength and membranization is needed, the characteristics of the lithium battery diaphragm and the performance index thereof are difficult to determine the production process technology barrier of the diaphragm are high, the research and development process is large, the diaphragm production process comprises raw material formula and quick adjustment, the micropore preparation technology, the complete equipment design and other processes, wherein the micropore preparation technology is the core of the lithium battery diaphragm I is a dry process, and the micropore preparation technology can be distinguished from the dry process of the two dry process diaphragm.
In the prior art, the electrostatic spraying of the lithium ion battery diaphragm is a processing method for enabling a charged polymer solution to form jet flow in a high-voltage electrostatic field and enabling polymer particles to be attached to the surface of a base film, and because the polymer particle coating is sprayed by atomization in the prior art, the spraying area is increased, and meanwhile, the spraying range of a single processing position is fixed, but because the atomized coating can be sprayed outside when the edge position of a diaphragm workpiece is sprayed, unnecessary production waste is caused, and because the manufacturing cost of the polymer particle coating is high, the production cost of the lithium ion battery diaphragm is further affected.
Disclosure of Invention
The invention aims to provide a preparation method and a coating device of a lithium ion battery separator, which are used for solving the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: the preparation method of the lithium ion battery diaphragm comprises the following steps:
step one: feeding, namely preprocessing raw materials such as PE (polyethylene), pore-forming agent and the like according to a formula, and conveying the raw materials to an extrusion system;
step two: casting, namely extruding a melt from a die head after melting and plasticizing the pretreated raw materials in an extrusion system, and forming a base film with a specific crystalline structure after casting the melt;
step three: heat treatment, namely, heat treating the base film to obtain a hard elastic film;
step four: asynchronous stretching, namely longitudinally stretching the casting thick sheet, and transversely stretching the longitudinally stretched casting thick sheet to obtain a base film containing a pore-forming agent;
step five: prefabricating a modified coating: preparing a solvent, wherein the mass ratio of the acetone to the dimethylformamide is 2:1, dissolving polyvinylidene fluoride powder in the solvent, wherein the mass ratio is 1:20, mixing, heating and stirring until the mixture is fully dissolved to form modified paint;
step six: coating, namely coating the base film by using a lithium ion battery diaphragm coating device to form a coated base film;
step seven: stretching, namely cold stretching and hot stretching the coating base film to form a nano microporous film;
step eight: slitting, namely cutting the nano microporous membrane into a finished membrane according to the specification requirements of customers.
Preferably, according to the above preparation method, in step five, there is now provided a coating device for a lithium ion battery separator, including: the device comprises a conveying platform, a coating mechanism, a control module, a winding mechanism, a conveying module, a temperature control module, a visual detection module and an unreeling mechanism; the coating mechanism is arranged in the middle of the top end of the conveying platform; the control module is arranged at the front side of the coating mechanism; the winding mechanism is arranged on the right side of the top end of the conveying platform and is electrically connected with the control module; the number of the conveying modules is two, the two conveying modules are respectively arranged at the left side and the right side of the top end of the conveying platform, and the conveying modules are electrically connected with the control module; the temperature control module is arranged at the top end of the coating mechanism and is electrically connected with the control module; the visual detection module is arranged at the left side of the coating mechanism and is electrically connected with the control module; the unreeling mechanism is arranged at the left side of the top end of the conveying platform and is electrically connected with the control module.
Preferably, the coating mechanism includes: the device comprises a shell, a leveling mechanism, a triaxial moving module, an expansion assembly, a slurry supply module and an ultrasonic module; the shell is arranged in the middle of the top end of the conveying platform along the left-right direction; the number of the leveling mechanisms is two, and the two leveling mechanisms are respectively arranged at openings at the left side and the right side of the conveying platform; the triaxial moving module is arranged at the top end of the inner cavity of the shell and is electrically connected with the control module; the expansion assembly is arranged at the moving end of the triaxial moving module; the slurry supply module is arranged at the front side of the inner cavity of the shell and is electrically connected with the control module; the ultrasonic module is arranged at the bottom end of the front side of the inner cavity of the shell, and the ultrasonic module is electrically connected with the control module.
Preferably, the leveling mechanism includes: the device comprises a fixing frame, a first limit guide rail, a lifting platform, a pressing plate, a limit spring, a limit rod, a rotating rod, an electric push rod, a connecting frame and a connecting seat; the number of the fixing frames is two, and the two fixing frames are respectively arranged at the front side and the rear side of the inner cavity of the coating mechanism; the number of the first limit guide rails is two, each group of the first limit guide rails is two, and the two groups of the first limit guide rails are respectively arranged at the bottom ends of the inner sides of the front fixing frame and the rear fixing frame along the up-down direction; the lifting platform is spliced outside the front and rear first limit guide rails along the front and rear directions; the pressing plate is arranged on the inner side of the bottom end of the lifting platform along the front-back direction; the number of the limiting springs is two, each limiting spring is arranged at the top end of the pressing plate from front to back, and the top ends of the limiting springs are fixedly connected with the bottom end of the lifting platform; one end of the limiting rod is rotationally connected with the top end of the inner side of the fixing frame at the rear side through a pin shaft; the rotating rod is rotationally connected to the top end of the inner side of the fixing frame at the front side through a pin shaft; one end of the electric push rod is rotationally connected to the top end of the fixing frame through a pin shaft, the other end of the electric push rod is rotationally connected to one end of the rotating rod through a pin shaft, and the electric push rod is electrically connected with the control module; the number of the connecting frames is two, one end of the inner side of each connecting frame is respectively connected with the front side and the rear side of the top end of the lifting platform in a rotating way through a pin shaft, and the other end of the inner side of each connecting frame is respectively connected with the other ends of the limiting rod and the rotating rod in a rotating way through a pin shaft; the connecting seat is rotationally connected with the outer side of the axis of the pin roll rotational connection of the connecting frame, the limiting rod and the rotating rod through bearings along the left-right direction.
Preferably, the leveling mechanism further comprises: the lifting seat comprises a second limiting guide rail, a lifting seat, an electric driving roller, a rack, a first rotating frame, a second rotating frame and a gear set; the second limiting guide rail is arranged in the middle of the inner side of the fixing frames at the front side and the rear side along the up-down direction; the lifting seat is sleeved outside the second limiting guide rail; the electric driving roller is arranged on the inner side of the lifting seat through a bracket and is electrically connected with the control module; the rack is arranged on the right side of the lifting seat along the up-down direction; one end of the first rotating frame is rotationally connected with the outer sides of the top ends of the inner sides of the front fixing frame and the rear fixing frame through pin shafts; one end of the second rotating frame is rotationally connected to the inner side of the top end of the lifting platform through a pin shaft, and the other end of the second rotating frame is rotationally connected to the outer side of the other end of the first rotating frame through a pin shaft; one end of the gear set is connected with the outer side of the axis of the pin shaft rotation connection of the first rotating frame and the fixed frames through a key, and the other end of the gear set is connected with the inner sides of the inner side top ends of the front fixed frame and the rear fixed frame through the pin shaft in a rotation manner and meshed with the racks.
Preferably, the expansion assembly includes: the device comprises an expansion mechanism shell, a mounting plate, a mounting arm, a blocking unit, a first limiting chute, a first motor, a rotating arm and a first limiting pin; the expansion mechanism shell is fixedly arranged at the moving end of the triaxial moving module; the mounting plate is arranged at the bottom end of the expansion mechanism shell; the number of the mounting arms is six, and one ends of the six mounting arms are circumferentially spaced by sixty degrees and are rotationally connected to the outer side of the bottom end of the mounting plate through pin shafts; the number of the blocking units is six, and the six blocking units are arranged outside the bottom ends of the six mounting arms; the number of the first limiting sliding grooves is six, and the six first limiting sliding grooves are formed in the inner side of the mounting arm; the number of the first motors is six, one ends of the six first motors are circumferentially spaced by sixty degrees, are rotationally connected to the outer sides of the bottom ends of the mounting plates through pin shafts and are positioned on the inner sides of two adjacent mounting arms, and the first motors are electrically connected with the control module; the number of the rotating arms is six, and one end of each of the six rotating arms is connected with the output end of the first motor through screws; the number of the first limiting pins is six, the six first limiting pins are arranged at the top ends of the other ends of the six rotating arms, and the six first limiting pins are respectively inserted into the inner sides of the six first limiting sliding grooves.
Preferably, the blocking unit includes: the ultrasonic nozzle comprises a top plate, a sleeve pipe, an ultrasonic nozzle, a porous slot seat, a plug rod, a baffle plate and a second limiting pin; the top plate is arranged at the bottom end of the outer side of the mounting arm through a bracket; the sleeve pipe is embedded in the opening of the middle part of the top plate along the up-down direction; the ultrasonic nozzle is arranged on the inner side of the sleeve pipe, the bottom end of the ultrasonic nozzle extends, and the ultrasonic nozzle and the slurry supply module are connected with the ultrasonic module; the multi-hole slot seat is arranged at the center of the outer wall of the sleeve pipe, and slots with the bottom ends communicated with the outside are formed in the multi-hole slot seat at seventy-two degrees intervals along the circumferential direction; the number of the inserting rods is five, and the five inserting rods are inserted at the outer side of the porous slot seat at intervals of seventy-two degrees along the circumferential direction; the number of the baffles is five, and the five baffles are arranged on the outer sides of the five inserted bars; the number of the second limiting pins is five, and the five second limiting pins are arranged on the inner sides of the bottom ends of the five inserted bars.
Preferably, the blocking unit further comprises: the gear disc, the second limiting chute, the second motor and the driving gear; the gear disc is rotationally connected to the bottom end of the outer wall of the sleeve pipe through a bearing; the number of the second limiting sliding grooves is five, the five second limiting sliding grooves are formed in the top end of the gear disc at seventy-two degrees along the circumferential direction, and the five second limiting pins are respectively spliced with the inner cavities of the five second limiting sliding grooves; the second motor is arranged at the top end of the porous slot seat, the output end of the second motor extends out of the lower surface of the porous slot seat, and the second motor is electrically connected with the control module; the driving gear is connected with the output end of the second motor through screws and meshed with the gear disc.
Compared with the prior art, the invention has the beneficial effects that:
1. unreel to the surface of delivery platform through unreeling mechanism to inside base film, delivery module carries the surface base film of delivery platform to inside the shell to electric putter drive dwang drive connecting seat downstream to both sides link drive lift platform drive clamp plate downstream compresses tightly the base film surface around the drive.
2. The expansion assembly is driven by the triaxial moving module to move in the triaxial direction above the base film, the rotating arm is driven by the first motor to rotate outwards, the first limiting pin is driven by the rotating arm to move outwards in the inner cavity of the first limiting chute, the blocking unit is driven by the installation arm to move outwards under the cooperation of the first limiting chute, so that the blocking unit is unfolded outwards in a specified range, the driving gear is driven by the second motor to rotate, the second limiting chute is driven by the gear disc to rotate outside the second limiting pin under the action of the rotation force of the driving gear, the inserting rod is driven by the second limiting pin to move outwards or inwards from the inside of the porous slot seat, the inserting rod is driven by the inserting rod to move outwards or inwards to a specified distance, the paint is pumped into the ultrasonic nozzle by the slurry supply module, the ultrasonic nozzle is sprayed after ultrasonic atomization is carried out on the paint inside the ultrasonic nozzle, and sprayed paint is sprayed on the specified area below the shielding of the baffle.
3. The lifting platform is shortened through the electric push rod to drive the pressing plate to move upwards to remove the fixation to the base film, and make lifting platform upward movement drive the first rotating frame of second rotating frame drive, first rotating frame drive gear train one side rotates, and drive opposite side gear train reverse rotation under the transmission of gear train, the rack is under the rotatory effect of gear train rotation force drive lifting seat, lifting seat drive electric drive roller downward movement, the inside motor drive roller wheel of electric drive roller rotates, make the base film transport out the shell inner chamber, right side transport module carries the base film to the winding mechanism inside and rolls up.
Therefore, the electrostatic spraying range of the lithium ion battery diaphragm can be adjusted, the spraying range can be controlled, and when the edge position of a workpiece sprayed with the diaphragm is processed, the spraying range is controllably shielded to control the spraying range of the paint, so that unnecessary production waste is avoided, and the production cost of the lithium ion battery diaphragm is reduced.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is an exploded view of the coating mechanism of fig. 1.
Fig. 3 is an exploded view of the flattening mechanism of fig. 2.
Fig. 4 is an exploded view of the expansion assembly of fig. 2.
Fig. 5 is an exploded view of the blocking unit of fig. 4.
In the figure: 1. a conveying platform; 2. a coating mechanism; 21. a housing; 22. a triaxial movement module; 24. a slurry supply module; 25. an ultrasonic module; 3. a leveling mechanism; 31. a fixing frame; 32. a first spacing rail; 33. a lifting platform; 34. a pressing plate; 35. a limit spring; 36. a limit rod; 37. a rotating lever; 38. an electric push rod; 39. a connecting frame; 310. a connecting seat; 311. a second spacing rail; 312. a lifting seat; 313. an electric drive roller; 314. a rack; 315. a first rotating frame; 316. a second turret; 317. a gear set; 4. an expansion component; 41. an expansion mechanism housing; 42. a mounting plate; 43. a mounting arm; 44. the first limiting chute; 45. a first motor; 46. a rotating arm; 47. a first limit pin; 5. a blocking unit; 51. a top plate; 52. a quill tube; 53. an ultrasonic nozzle; 54. a porous socket; 55. a rod; 56. a baffle; 57. a second limiting pin; 58. a gear plate; 59. the second limiting chute; 510. a second motor; 511. a drive gear; 6. a control module; 7. a winding mechanism; 8. a transport module; 9. a temperature control module; 10. a visual detection module; 11. unreeling mechanism.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
step one: feeding, namely preprocessing raw materials such as PE (polyethylene), pore-forming agent and the like according to a formula, and conveying the raw materials to an extrusion system; step two: casting, namely extruding a melt from a die head after melting and plasticizing the pretreated raw materials in an extrusion system, and forming a base film with a specific crystalline structure after casting the melt; step three: heat treatment, namely, heat treating the base film to obtain a hard elastic film; step four: asynchronous stretching, namely longitudinally stretching the casting thick sheet, and transversely stretching the longitudinally stretched casting thick sheet to obtain a base film containing a pore-forming agent; step five: prefabricating a modified coating: preparing a solvent, wherein the mass ratio of the acetone to the dimethylformamide is 2:1, dissolving polyvinylidene fluoride powder in the solvent, wherein the mass ratio is 1:20, mixing, heating and stirring until the mixture is fully dissolved to form modified paint; step six: coating, namely coating the base film by using a lithium ion battery diaphragm coating device to form a coated base film; step seven: stretching, namely cold stretching and hot stretching the coating base film to form a nano microporous film; step eight: slitting, namely cutting the nano microporous membrane into a finished membrane according to the specification requirements of customers.
Embodiment 2 referring to fig. 1-5, a coating apparatus for a lithium ion battery separator is now provided, which includes: the device comprises a conveying platform 1, a coating mechanism 2, a control module 6, a winding mechanism 7, a conveying module 8, a temperature control module 9, a visual detection module 10 and an unreeling mechanism 11; the coating mechanism 2 is arranged in the middle of the top end of the conveying platform 1; the control module 6 is arranged at the front side of the coating mechanism 2, and a preset logic program can be installed in the control module 6 for control; the winding mechanism 7 is arranged on the right side of the top end of the conveying platform 1, the winding mechanism 7 is electrically connected with the control module 6, the winding mechanism 7 can be controlled by the control module 6, and the right conveying module 8 conveys the base film into the winding mechanism 7 for winding; the number of the conveying modules 8 is two, the two conveying modules 8 are respectively arranged at the left side and the right side of the top end of the conveying platform 1, the conveying modules 8 are electrically connected with the control module 6, the conveying modules 8 can be controlled by the control module 6, and the motor driving roller wheel in the conveying modules 8 can convey the surface base film of the conveying platform 1; the temperature control module 9 is arranged at the top end of the coating mechanism 2, the temperature control module 9 is electrically connected with the control module 6, the temperature control module 9 can be controlled by the control module 6, and the temperature control module 9 controls the temperature in the spraying operation process inside the shell 21; the visual detection module 10 is arranged at the left side of the coating mechanism 2, the visual detection module 10 is electrically connected with the control module 6, the visual detection module 10 can be controlled by the control module 6, and the visual detection module 10 detects that a base film below sends a signal to the inside of the control module 6; unreeling mechanism 11 sets up in the top left side of delivery platform 1, unreels mechanism 11 and control module 6 electric connection, and unreels mechanism 11 can be controlled by control module 6, unreels mechanism 11 to the surface of delivery platform 1 to inside base film.
As a preferred embodiment, the coating mechanism 2 further includes: a housing 21, a leveling mechanism 3, a triaxial moving module 22, an expansion assembly 4, a slurry feeding module 24 and an ultrasonic module 25; the housing 21 is arranged in the middle of the top end of the conveying platform 1 along the left-right direction; the number of the leveling mechanisms 3 is two, and the two leveling mechanisms 3 are respectively arranged at openings at the left side and the right side of the conveying platform 1; the triaxial moving module 22 is arranged at the top end of the inner cavity of the shell 21, the triaxial moving module 22 is electrically connected with the control module 6, the triaxial moving module 22 can be controlled by the control module 6, and the triaxial moving module 22 drives the expansion assembly 4 to move in triaxial directions; the expansion assembly 4 is arranged at the moving end of the triaxial moving module 22; the slurry supply module 24 is disposed at the front side of the inner cavity of the housing 21, the slurry supply module 24 is electrically connected with the control module 6, the slurry supply module 24 can be controlled by the control module 6, and the slurry supply module 24 can be connected with an external paint supply device to pump paint into the ultrasonic spray head 53; the ultrasonic module 25 is arranged at the bottom end of the front side of the inner cavity of the shell 21, the ultrasonic module 25 is electrically connected with the control module 6, the ultrasonic module 25 can be controlled by the control module 6, and the ultrasonic module 25 sprays the coating in the ultrasonic spray head 53 after ultrasonic atomization.
Preferably, the leveling mechanism 3 further includes: the fixed frame 31, the first limit guide rail 32, the lifting platform 33, the pressing plate 34, the limit spring 35, the limit rod 36, the rotating rod 37, the electric push rod 38, the connecting frame 39, the connecting seat 310, the second limit guide rail 311, the lifting seat 312, the electric driving roller 313, the rack 314, the first rotating frame 315, the second rotating frame 316 and the gear set 317; the number of the fixing frames 31 is two, and the two fixing frames 31 are respectively arranged at the front side and the rear side of the inner cavity of the coating mechanism 2; the number of the first limit guide rails 32 is two, the number of each group of the first limit guide rails 32 is two, and the two groups of the first limit guide rails 32 are respectively arranged at the bottom ends of the inner sides of the front fixing frame 31 and the rear fixing frame 31 along the up-down direction; the lifting platform 33 is inserted in the front-rear direction outside the front and rear first limit guide rails 32, and the lifting platform 33 can move up and down outside the first limit guide rails 32; the pressing plate 34 is provided inside the bottom end of the elevating platform 33 in the front-rear direction; the number of the limiting springs 35 is two, each group of limiting springs 35 is arranged at the top end of the pressing plate 34 from front to back, the top end of the limiting spring 35 is fixedly connected with the bottom end of the lifting platform 33, and the limiting springs 35 have elasticity and can reset under the action of elasticity; one end of the limiting rod 36 is rotatably connected to the inner top end of the rear side fixing frame 31 through a pin shaft, and the limiting rod 36 can rotate by taking the rotating connection part of the limiting rod and the pin shaft of the inner top end of the rear side fixing frame 31 as an axis; the rotating rod 37 is rotatably connected to the top end of the inner side of the front side fixing frame 31 through a pin shaft, and the rotating rod 37 can rotate by taking the rotating connection part of the pin shaft with the front side fixing frame 31 as the axis; one end of an electric push rod 38 is rotationally connected to the top end of the fixed frame 31 through a pin shaft, the other end of the electric push rod 38 is rotationally connected to one end of the rotating rod 37 through a pin shaft, the electric push rod 38 is electrically connected with the control module 6, the electric push rod 38 is controlled by the control module 6, and the electric push rod 38 is lengthened by itself to shorten and drive the top end of the rotating rod 37 to move; the number of the connecting frames 39 is two, one end of the inner side of each connecting frame 39 is respectively connected with the front side and the rear side of the top end of the lifting platform 33 through a pin shaft in a rotating way, and the other end of the inner side of each connecting frame 39 is respectively connected with the other ends of the limiting rod 36 and the rotating rod 37 through a pin shaft in a rotating way; the connecting seat 310 is rotationally connected to the outer sides of the pin shaft rotation connecting axes of the connecting frame 39, the limiting rod 36 and the rotating rod 37 along the left-right direction through bearings, the connecting seat 310 can form a parallelogram structure with the limiting rod 36 and the rotating rod 37, and the connecting seat 310 can form a parallelogram structure with the connecting frames 39 at two sides; the second limit guide rail 311 is disposed at the middle of the inner side of the front and rear side fixing frames 31 in the up-down direction; the lifting seat 312 is sleeved outside the second limit guide rail 311; the electric driving roller 313 is arranged on the inner side of the lifting seat 312 through a bracket, the electric driving roller 313 is electrically connected with the control module 6, the electric driving roller 313 is controlled by the control module 6, and a motor driving roller wheel in the electric driving roller 313 rotates to enable the base film to move under the action of friction force of the roller wheel; the rack 314 is disposed on the right side of the elevating seat 312 in the up-down direction; one end of the first rotating frame 315 is rotatably connected to the outer sides of the inner top ends of the front and rear fixed frames 31 through a pin shaft; one end of the second rotating frame 316 is rotatably connected to the inner side of the top end of the lifting platform 33 through a pin shaft, and the other end of the second rotating frame 316 is rotatably connected to the outer side of the other end of the first rotating frame 315 through a pin shaft; one end of the gear set 317 is connected to the outer side of the pin shaft rotation connection axle center of the first rotating frame 315 and the fixed frames 31 in a key manner, the other end of the gear set 317 is connected to the inner side of the inner side top ends of the front and rear fixed frames 31 in a pin shaft rotation manner and meshed with the rack 314, and the gear set 317 plays roles of driving and changing the driving direction.
Preferably, the expansion assembly 4 further comprises: the expanding mechanism comprises an expanding mechanism shell 41, a mounting plate 42, a mounting arm 43, a blocking unit 5, a first limiting chute 44, a first motor 45, a rotating arm 46 and a first limiting pin 47; the expansion mechanism housing 41 is fixedly installed at the moving end of the triaxial moving module 22; the mounting plate 42 is mounted at the bottom end of the expansion mechanism housing 41; the number of the mounting arms 43 is six, and one ends of the six mounting arms 43 are circumferentially spaced by sixty degrees and are rotationally connected to the outer side of the bottom end of the mounting plate 42 through pin shafts; the number of the blocking units 5 is six, and the six blocking units 5 are outside the bottom ends of the six mounting arms 43; the number of the first limiting sliding grooves 44 is six, and the six first limiting sliding grooves 44 are formed in the inner side of the mounting arm 43; the number of the first motors 45 is six, one ends of the six first motors 45 are rotationally connected to the outer side of the bottom end of the mounting plate 42 at intervals of sixty degrees along the circumferential direction through pin shafts and positioned on the inner sides of two adjacent mounting arms 43, the first motors 45 are electrically connected with the control module 6, the first motors 45 are controlled by the control module 6, and the first motors 45 drive the rotating arms 46 to rotate; the number of the rotating arms 46 is six, and one end of each of the six rotating arms 46 is connected with the output end of the first motor 45 through a screw; the number of the first limiting pins 47 is six, the six first limiting pins 47 are mounted on the top ends of the other ends of the six rotating arms 46, the six first limiting pins 47 are respectively inserted into the inner sides of the six first limiting sliding grooves 44, and the first limiting pins 47 can move along the inner sides of the first limiting sliding grooves 44.
As a preferred solution, the blocking unit 5 further comprises: the ultrasonic wave nozzle comprises a top plate 51, a sleeve pipe 52, an ultrasonic wave nozzle 53, a porous slot seat 54, a plug rod 55, a baffle 56, a second limiting pin 57, a gear disc 58, a second limiting chute 59, a second motor 510 and a driving gear 511; the top plate 51 is mounted at the outer bottom end of the mounting arm 43 by a bracket; the sleeve pipe 52 is embedded in the middle opening of the top plate 51 along the up-down direction; the ultrasonic nozzle 53 is arranged on the inner side of the sleeve pipe 52, the bottom end of the ultrasonic nozzle 53 extends, and the ultrasonic nozzle 53 and the slurry supply module 24 are connected with the ultrasonic module 25; the porous slot seat 54 is arranged at the center of the outer wall of the sleeve pipe 52, and slots with the bottom ends communicated with the outside are formed in the porous slot seat 54 at seventy-two degrees intervals along the circumferential direction; the number of the inserting rods 55 is five, the five inserting rods 55 are inserted at the outer side of the porous slot seat 54 at seventy-two degrees intervals along the circumferential direction, and the inserting rods 55 can move inwards or outwards at the outer side of the porous slot seat 54; the number of the baffles 56 is five, and the five baffles 56 are arranged on the outer sides of the five inserted bars 55; the number of the second limiting pins 57 is five, and the five second limiting pins 57 are arranged on the inner sides of the bottom ends of the five inserted bars 55; the gear disc 58 is rotatably connected to the bottom end of the outer wall of the sleeve tube 52 through a bearing; the number of the second limiting sliding grooves 59 is five, the five second limiting sliding grooves 59 are formed in the top end of the gear disc 58 at seventy-two degrees along the circumferential direction, the five second limiting pins 57 are respectively spliced with the inner cavities of the five second limiting sliding grooves 59, and the second limiting pins 57 can move along the inner cavities of the second limiting sliding grooves 59; the second motor 510 is arranged at the top end of the porous slot seat 54, the output end of the second motor 510 extends out of the lower surface of the porous slot seat 54, the second motor 510 is electrically connected with the control module 6, the second motor 510 can be controlled by the control module 6, and the second motor 510 drives the driving gear 511 to rotate; the driving gear 511 is screw-coupled to the output end of the second motor 510 and is engaged with the gear plate 58, and the gear plate 58 can be rotated by the rotation force of the driving gear 511.
The coating device for the lithium ion battery diaphragm has the following working principle.
Step 1: the coating is injected into the slurry supply module 24 in advance, the base film roll is arranged in the unreeling mechanism 11, the conveying module 8 and the visual detection module 10 are controlled to be sequentially started by the control module 6, the unreeling mechanism 11 unreels the base film in the interior to the surface of the conveying platform 1, the conveying module 8 conveys the base film on the surface of the conveying platform 1 into the shell 21, the visual detection module 10 detects that the base film is arranged below, by sending signals to the control module 6, the electric push rods 38 in the left and right leveling mechanisms 3 are sequentially controlled by a preset program in the control module 6 to be started, the electric push rods 38 extend to drive the top ends of the rotating rods 37 to move, the rotating rods 37 rotate with the pin shafts of the front fixing frames 31 as axes, the bottom ends of the rotating rods 37 drive the connecting seats 310 to move downwards, the top ends of the connecting frames 39 at the limiting positions of the limiting rods 36 drive the front and rear connecting frames 39 to rotate with the pin shafts of the top ends of the lifting platform 33, and the connecting frames 39 drive the lifting platform 33 to start under the limiting positions of the first limiting guide rails 32, and the pressing plates 35 drive the pressing plates 33 to move downwards to the base film 33.
Step 2: the control module 6 is internally and pre-programmed to sequentially control the three-axis moving module 22, the first motor 45, the second motor 510, the slurry supplying module 24 and the ultrasonic module 25 to start, the three-axis moving module 22 drives the expansion assembly 4 to move in three-axis directions above the base film, so that the expansion assembly 4 moves in a serpentine manner along the surface of the base film, the first motor 45 drives the rotating arm 46 to rotate outwards, the rotating arm 46 drives the first limiting pin 47 to move outwards in the inner cavity of the first limiting chute 44, the mounting arm 43 drives the blocking unit 5 to move outwards under the cooperation of the first limiting chute 44, so that the blocking unit 5 expands a specified range outwards, the second motor 510 drives the driving gear 511 to rotate, the gear disc 58 rotates under the rotation force of the driving gear 511, the gear disc 58 drives the second limiting chute 59 to rotate outwards in the second limiting pin 57, the second limiting pin 57 moves inwards or outwards along the inner cavity of the second limiting chute 59, the second limiting pin 57 drives the insert rod 55 to move inwards or inwards from the inside of the porous slot seat 54, so that the insert rod 55 drives the baffle 56 or inwards to move outwards to the specified distance to drive the blocking unit 5 to spread the specified range outwards, the driving gear 511 rotates, the gear disc 511 is driven by the gear disc 58 to rotate under the rotation of the driving gear disc 511, and the driving gear disc 58 rotates, so that the second limiting pin 58 rotates under the rotation of the driving gear 57.
Step 3: after spraying, the control module 6 sequentially controls the electric push rod 38, the electric driving roller 313 and the conveying module 8 in the left leveling mechanism 3 and the right leveling mechanism to start, the electric push rod 38 shortens to enable the lifting platform 33 to drive the pressing plate 34 to move upwards to release the fixation of the base film, the lifting platform 33 moves upwards to drive the second rotating frame 316 to rotate around the rotating connection position of the pin shaft at the top end of the lifting platform 33 as an axis, the second rotating frame 316 drives the first rotating frame 315 to rotate, the first rotating frame 315 drives one side of the gear set 317 to rotate, the other side of the gear set 317 is driven to rotate reversely under the transmission of the gear set 317, the rack 314 is meshed with the gear set 317 to drive the lifting seat 312 under the rotating force of the gear set 317, the lifting seat 312 drives the electric driving roller 313 to move downwards under the limiting action of the second limiting guide rail 311 to enable the electric driving roller 313 to be in contact with the base film, the motor driving roller wheel inside the electric driving roller 313 rotates to enable the base film to be conveyed out of the inner cavity of the shell 21, and the right conveying module 8 conveys the base film into the winding mechanism 7 to be wound.
Therefore, the electrostatic spraying range of the lithium ion battery diaphragm can be adjusted, the spraying range can be controlled, and when the edge position of a workpiece sprayed with the diaphragm is processed, the spraying range is controllably shielded to control the spraying range of the paint, so that unnecessary production waste is avoided, and the production cost of the lithium ion battery diaphragm is reduced.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The preparation method of the lithium ion battery diaphragm is characterized by comprising the following steps:
step one: feeding, namely preprocessing raw materials such as PE (polyethylene), pore-forming agent and the like according to a formula, and conveying the raw materials to an extrusion system;
step two: casting, namely extruding a melt from a die head after melting and plasticizing the pretreated raw materials in an extrusion system, and forming a base film with a specific crystalline structure after casting the melt;
step three: heat treatment, namely, heat treating the base film to obtain a hard elastic film;
step four: asynchronous stretching, namely longitudinally stretching the casting thick sheet, and transversely stretching the longitudinally stretched casting thick sheet to obtain a base film containing a pore-forming agent;
step five: prefabricating a modified coating: preparing a solvent, wherein the mass ratio of the acetone to the dimethylformamide is 2:1, dissolving polyvinylidene fluoride powder in the solvent, wherein the mass ratio is 1:20, mixing, heating and stirring until the mixture is fully dissolved to form modified paint;
step six: coating, namely coating the base film by using a lithium ion battery diaphragm coating device to form a coated base film;
step seven: stretching, namely cold stretching and hot stretching the coating base film to form a nano microporous film;
step eight: slitting, namely cutting the nano microporous membrane into a finished membrane according to the specification requirements of customers.
2. A coating device for a lithium ion battery separator, which is applied to the preparation method of the lithium ion battery separator as claimed in claim 1, and is characterized in that: in the sixth step, the separator coating device for lithium ion batteries comprises: the device comprises a conveying platform (1), a coating mechanism (2), a control module (6), a winding mechanism (7), a conveying module (8), a temperature control module (9), a visual detection module (10) and an unreeling mechanism (11);
coating mechanism (2) set up in the top middle part of delivery platform (1), control module (6) set up the front side of coating mechanism (2), winding mechanism (7) set up the top right side of delivery platform (1), winding mechanism (7) and control module (6) electric connection, the quantity of delivery module (8) is two, two delivery module (8) set up respectively in the top left and right sides of delivery platform (1), delivery module (8) and control module (6) electric connection, temperature control module (9) set up the top of coating mechanism (2), temperature control module (9) and control module (6) electric connection, visual detection module (10) set up the left side of coating mechanism (2), visual detection module (10) and control module (6) electric connection, unreel mechanism (11) set up the top left side of delivery platform (1), unreel mechanism (11) and control module (6) electric connection.
3. The coating device for a lithium ion battery separator according to claim 2, wherein: the coating mechanism (2) comprises: a shell (21), a leveling mechanism (3), a triaxial moving module (22), an expansion assembly (4), a slurry supply module (24) and an ultrasonic module (25);
the shell (21) is arranged in the middle of the top end of the conveying platform (1) along the left-right direction, the number of the leveling mechanisms (3) is two, the leveling mechanisms (3) are respectively arranged at the openings at the left side and the right side of the conveying platform (1), the triaxial moving module (22) is arranged at the top end of an inner cavity of the shell (21), the triaxial moving module (22) is electrically connected with the control module (6), the expansion assembly (4) is arranged at the moving end of the triaxial moving module (22), the slurry supply module (24) is arranged at the front side of the inner cavity of the shell (21), the slurry supply module (24) is electrically connected with the control module (6), the ultrasonic module (25) is arranged at the bottom end of the front side of the inner cavity of the shell (21), and the ultrasonic module (25) is electrically connected with the control module (6).
4. A coating apparatus for a lithium ion battery separator according to claim 3, wherein: the leveling mechanism (3) comprises: the device comprises a fixing frame (31), a first limit guide rail (32), a lifting platform (33), a pressing plate (34), a limit spring (35), a limit rod (36), a rotating rod (37), an electric push rod (38), a connecting frame (39) and a connecting seat (310);
the number of the fixing frames (31) is two, the two fixing frames (31) are respectively arranged at the front side and the rear side of the inner cavity of the coating mechanism (2), the number of the first limit guide rails (32) is two, each group of the first limit guide rails (32) is two, the two groups of the first limit guide rails (32) are respectively arranged at the inner side bottom ends of the front fixing frame and the rear fixing frame (31) along the up-down direction, the lifting platform (33) is inserted outside the front and the rear first limit guide rails (32) along the front and the rear direction, the pressing plate (34) is arranged at the inner side of the bottom end of the lifting platform (33) along the front and the rear direction, the number of the limit springs (35) is two, each group of the limit springs (35) is arranged at the top end of the pressing plate (34) from front to the rear, the top end of the limit springs (35) is fixedly connected with the bottom end of the lifting platform (33), one end of the limit rod (36) is rotationally connected with the inner side top end of the rear fixing frame (31) through a pin shaft, the push rod (37) is rotationally connected with one end of the push rod (38) through the pin shaft (6) which is electrically connected with one end of the push rod (38), the number of the connecting frames (39) is two, one end of the inner side of each connecting frame (39) is respectively connected with the front side and the rear side of the top end of the lifting platform (33) through a pin shaft in a rotating mode, the other end of the inner side of each connecting frame (39) is respectively connected with the other ends of the limiting rod (36) and the rotating rod (37) through a pin shaft in a rotating mode, and the connecting seat (310) is connected with the outer sides of the axes of the pin shafts of the connecting frames (39), the limiting rod (36) and the rotating rod (37) in a rotating mode through bearings in the left-right direction.
5. The coating device for a lithium ion battery separator according to claim 4, wherein: the leveling mechanism (3) further comprises: the second limit guide rail (311), the lifting seat (312), the electric driving roller (313), the rack (314), the first rotating frame (315), the second rotating frame (316) and the gear set (317);
the second limiting guide rail (311) is arranged in the middle of the inner sides of the front fixing frame (31) and the rear fixing frame (31) along the up-down direction, the lifting seat (312) is sleeved outside the second limiting guide rail (311), the electric driving roller (313) is arranged on the inner side of the lifting seat (312) through a support, the electric driving roller (313) is electrically connected with the control module (6), the rack (314) is arranged on the right side of the lifting seat (312) along the up-down direction, one end of the first rotating frame (315) is rotationally connected on the outer sides of the inner sides of the front fixing frame and the rear fixing frame (31) through a pin shaft, one end of the second rotating frame (316) is rotationally connected on the inner sides of the tops of the lifting platform (33) through a pin shaft, the other end of the second rotating frame (316) is rotationally connected on the outer sides of the other ends of the first rotating frame (315), one end of the gear set (317) is in key connection with the outer sides of the pin shafts of the first rotating frame (315), and the other ends of the gear set (317) are rotationally connected with the rack (314) through the pin shafts.
6. The coating device for a lithium ion battery separator according to claim 5, wherein: the expansion assembly (4) comprises: an expansion mechanism shell (41), a mounting plate (42), a mounting arm (43), a blocking unit (5), a first limiting chute (44), a first motor (45), a rotating arm (46) and a first limiting pin (47);
the expanding mechanism shell (41) is fixedly arranged at the moving end of the triaxial moving module (22), the mounting plate (42) is arranged at the bottom end of the expanding mechanism shell (41), the number of the mounting arms (43) is six, one ends of the six mounting arms (43) are connected to the outer side of the bottom end of the mounting plate (42) at intervals of sixty degrees in the circumferential direction through pin shafts in a rotating mode, the number of the blocking units (5) is six, the six blocking units (5) are arranged on the outer side of the bottom ends of the six mounting arms (43), the number of the first limiting sliding grooves (44) is six, the six first limiting sliding grooves (44) are formed in the inner side of the mounting arms (43), the number of the first motors (45) is six, one ends of the six first motors (45) are connected to the outer side of the bottom ends of the mounting plates (42) through pin shafts in a rotating mode and are located on the inner sides of two adjacent mounting arms (43), the first motors (45) are electrically connected with the control module (6), the number of the six motors (46) is six, the number of the six motors (46) are arranged on the top ends of the six limiting pins (47) are connected to the other ends of the six limiting pins (47), six first limiting pins (47) are respectively inserted into the inner sides of the six first limiting sliding grooves (44).
7. The coating device for a lithium ion battery separator according to claim 6, wherein: the blocking unit (5) comprises: the ultrasonic device comprises a top plate (51), a sleeve pipe (52), an ultrasonic nozzle (53), a porous slot seat (54), a plug rod (55), a baffle plate (56) and a second limiting pin (57);
roof (51) are in through the support mounting outside bottom of installation arm (43), and telescopic pipe (52) are along upper and lower direction embedded in the middle part opening part of roof (51), ultrasonic nozzle (53) set up the inboard of telescopic pipe (52), the bottom of ultrasonic nozzle (53) extends, ultrasonic nozzle (53) and thick liquids supply module (24) are connected with ultrasonic module (25), and porous slot seat (54) set up the outer wall central point of telescopic pipe (52), slot that bottom and outside link up is seted up to porous slot seat (54) along circumference interval seventy-two, and inserted bar (55) the quantity of inserted bar (55) is five, and five inserted bar (55) are pegged graft in the outside of porous slot seat (54) along circumference interval seventy-two, the quantity of baffle (56) is five, five baffle (56) set up the outside of five inserted bar (55), the quantity of second spacer pin (57) is five, and five the bottom of second spacer pin (57) is set up in five inserted bar (55).
8. The coating device for a lithium ion battery separator according to claim 7, wherein: the blocking unit (5) further comprises: the gear disc (58), the second limiting chute (59), the second motor (510) and the driving gear (511);
the gear disc (58) is rotationally connected to the bottom end of the outer wall of the sleeve tube (52) through a bearing, the number of the second limiting sliding grooves (59) is five, the five second limiting sliding grooves (59) are formed in the top end of the gear disc (58) along the circumferential direction at seventy-two degrees, the five second limiting pins (57) are respectively inserted into the inner cavities of the five second limiting sliding grooves (59), the second motor (510) is arranged at the top end of the porous slot seat (54), the output end of the second motor (510) extends out of the lower surface of the porous slot seat (54), the second motor (510) is electrically connected with the control module (6), and the driving gear (511) is connected with the output end of the second motor (510) through screws and is meshed with the gear disc (58).
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| CN202310291708.6A CN115995656B (en) | 2023-03-23 | 2023-03-23 | Preparation method and coating device of lithium ion battery diaphragm |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115674740A (en) * | 2022-11-30 | 2023-02-03 | 泰州衡川新能源材料科技有限公司 | Preparation method and preparation device of lithium ion battery diaphragm |
| CN116713159A (en) * | 2023-08-11 | 2023-09-08 | 泰州衡川新能源材料科技有限公司 | Flow distribution device and method of lithium ion battery diaphragm slurry spin coater |
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| CN114243221A (en) * | 2021-12-23 | 2022-03-25 | 中材锂膜有限公司 | High-elasticity deformation diaphragm and preparation method thereof |
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| CN108046030A (en) * | 2017-12-29 | 2018-05-18 | 深圳市新嘉拓自动化技术有限公司 | A kind of comprehensive high speed membrane coating equipment |
| CN208786727U (en) * | 2018-06-20 | 2019-04-26 | 东莞市卓高电子科技有限公司 | The dotted spray equipment of diaphragm ultrasonic wave |
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| CN115674740A (en) * | 2022-11-30 | 2023-02-03 | 泰州衡川新能源材料科技有限公司 | Preparation method and preparation device of lithium ion battery diaphragm |
| CN115674740B (en) * | 2022-11-30 | 2024-06-07 | 泰州衡川新能源材料科技有限公司 | Preparation method and preparation device of lithium ion battery diaphragm |
| CN116713159A (en) * | 2023-08-11 | 2023-09-08 | 泰州衡川新能源材料科技有限公司 | Flow distribution device and method of lithium ion battery diaphragm slurry spin coater |
| CN116713159B (en) * | 2023-08-11 | 2023-10-13 | 泰州衡川新能源材料科技有限公司 | Flow distribution device and method of lithium ion battery diaphragm slurry spin coater |
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