阅读说明：本技术 一种多功能锂电池隔膜涂布机 (Multifunctional lithium battery diaphragm coating machine ) 是由 舒星火 陈禹 孙兆安 丁晓峰 于 2021-09-24 设计创作，主要内容包括：本发明属于涂布机械技术领域,具体涉及一种多功能锂电池隔膜涂布机。本一种多功能锂电池隔膜涂布机包括：第一涂布机构和第二涂布机构；第一涂布机构包括第一机架、主导料组件、第一、第二辅导料组件、第一和第二涂布组件；第二涂布机构包括第二机架、第三辅导料组件和第三涂布组件。本一种多功能锂电池隔膜涂布机,放卷机构放出的锂电池隔膜用基膜经主导料组件导引转向不同的辅导料组件,以使锂电池隔膜用基膜经过第一、第二或第三涂布组件,实现一条生产线能实现对锂电池隔膜用基膜进行三辊涂布、微凹涂布或圆网印刷点涂涂布。能够兼容多种特性浆料以及不同类型锂电池隔膜用基膜,可任选涂布方式切换,满足客户个性化需求。(The invention belongs to the technical field of coating machinery, and particularly relates to a multifunctional lithium battery diaphragm coating machine. This multi-functional lithium battery diaphragm coating machine includes: a first coating mechanism and a second coating mechanism; the first coating mechanism comprises a first frame, a main guide component, a first auxiliary guide component, a second auxiliary guide component, a first coating component and a second coating component; the second coating mechanism comprises a second frame, a third auxiliary material component and a third coating component. This multi-functional lithium cell diaphragm coating machine, the lithium cell diaphragm that unwinding mechanism emitted turns to different auxiliary guide material subassemblies through the guide of main guide material subassembly to make lithium cell diaphragm pass through first, second or third coating assembly, realize that a production line can realize carrying out three-roller coating, slightly concave coating or rotary screen printing point to lithium cell diaphragm with the base film and scribble the coating. The base film can be compatible with slurry with various characteristics and different types of lithium battery diaphragms, the coating mode can be optionally switched, and the individual requirements of customers are met.)

1. A multifunctional lithium battery separator coater is characterized by comprising:

the first coating mechanism and the second coating mechanism are arranged between the unreeling mechanism and the drying mechanism;

the first coating mechanism comprises a first machine frame, and a main guide component, a first auxiliary guide component, a second auxiliary guide component, a first coating component and a second coating component which are arranged on the first machine frame;

when the main guide assembly is matched with the first auxiliary guide assembly to convey the base film for the lithium battery diaphragm to pass through the first coating assembly;

when the main guide assembly is matched with the second auxiliary guide assembly to convey the base film for the lithium battery diaphragm to pass through the second coating assembly;

the first coating assembly is suitable for carrying out three-roll coating on the base film for the lithium battery diaphragm;

the second coating component is suitable for carrying out micro-concave coating on the base film for the lithium battery diaphragm;

the second coating mechanism comprises a second machine frame, and a third auxiliary guide component and a third coating component which are arranged on the second machine frame;

when the main guide assembly is matched with the third auxiliary guide assembly to convey the base film for the lithium battery diaphragm to pass through the third coating assembly;

the third coating assembly is suitable for performing rotary screen printing point coating on the base film for the lithium battery diaphragm.

2. The multifunctional lithium battery separator coater according to claim 1, wherein,

the first coating assembly comprises a rubber-pressing roller, a feeding roller, a transfer roller, a scraping roller and a trough; wherein

The rubber pressing roller is rotatably arranged on the first rack so as to be matched with the first auxiliary guide component to guide the base film for the lithium battery diaphragm;

the material groove is arranged on the first rack to contain the slurry for three-roller coating;

the feeding roller is rotatably arranged at the position, above the trough, of the first machine frame, and the outer edge of the lower part of the feeding roller enters slurry;

the transfer roller is arranged on the first rack in a reverse rotation mode so as to transfer the slurry attached to the outer edge of the feeding roller to the base film for the lithium battery diaphragm on the rubber-pressing roller;

the scraping roller is arranged on the first rack in a reverse rotating mode, is positioned on one side, away from the rubber pressing roller, of the transfer roller and is suitable for cleaning slurry on the outer edge of the transfer roller.

3. The multifunctional lithium battery separator coater according to claim 2, wherein,

a servo motor is arranged on the first rack, and a transverse screw rod is connected to the servo motor;

the transverse screw rod is connected with the scraping roller;

the servo motor rotates to drive the transverse screw rod to rotate to pull the scraping roller to move, so that the distance between the scraping roller and the transfer roller is adjusted;

a first air cylinder part connected with the rubber-pressing roller is arranged on the first frame so as to adjust the distance between the rubber-pressing roller and the transfer roller;

a vertical screw rod is arranged at the bottom of the trough, and a rotary rod meshed with the vertical screw rod is arranged on the first rack;

the rotating rod rotates to drive the vertical screw rod to support the material groove to lift, so that the distance between the material groove and the feeding roller is adjusted.

4. The multifunctional lithium battery separator coater according to claim 1, wherein,

the second coating assembly comprises two back coating rollers, a coating roller and a closed first scraper cavity;

the first scraper cavity is arranged on the first frame to feed materials to the coating roller and scrape off excess materials;

the two back coating rollers are rotatably arranged on the first rack so as to be matched with the second auxiliary guide component to guide the base film for the lithium battery diaphragm;

the coating roll is arranged on the first rack in a reverse rotating mode so as to coat the slurry output by the first scraper cavity on the base film for the lithium battery diaphragm on the back coating roll.

5. The multifunctional lithium battery separator coater according to claim 4, wherein,

the coating roller and the first scraper cavity are arranged on the first rack through a mounting rack;

and a second cylinder piece connected with the mounting frame is arranged on the first rack so as to adjust the distance between the coating roll and the back coating roll.

6. The multifunctional lithium battery separator coater according to claim 1, wherein,

the third coating assembly comprises a rubber roller, a circular mesh roller and a frame body; wherein

The frame body is arranged on the second frame to convey slurry to the rotary screen roller;

the rubber roller is rotatably arranged on the second rack so as to be matched with the third auxiliary guide component to guide the base film for the lithium battery diaphragm;

the rotary screen roller is arranged on the frame body in a reverse rotating mode so as to be in running fit with the rubber roller to coat the sizing agent on the base film for the lithium battery diaphragm on the rubber roller.

7. The multifunctional lithium battery separator coater according to claim 6, wherein,

and a self-wetting piece is arranged in the circle of the circular screen roller.

8. The multifunctional lithium battery separator coater according to claim 3, wherein,

the outer edge of the lower part of the feeding roller is positioned above the top of the trough;

a movable material storage mechanism is arranged at the position, located on one side of the feeding roller, of the first machine frame so as to convey slurry to the feeding roller;

the feeding roller, the transfer roller and the rubber pressing roller are matched to realize coating of the base film pole piece for the lithium battery diaphragm.

9. The multifunctional lithium battery separator coater according to claim 3, wherein,

the first coating assembly further comprises a gravure roll and a second doctor blade cavity; wherein

The gravure roller is arranged on the first rack in a rotating mode instead of the feeding roller, and the outer edge of the lower portion of the gravure roller is located above the top of the material groove;

the second scraper cavity is arranged on the material groove to feed materials to the gravure roller and scrape off excess materials;

the gravure roller, the transfer roller and the rubber pressing roller are matched to realize gravure coating of the base film for the lithium battery diaphragm.

10. The multifunctional lithium battery separator coater according to claim 1, wherein,

and tension feedback assemblies are arranged in the unwinding mechanism and the winding mechanism.

Technical Field

The invention belongs to the technical field of coating machinery, and particularly relates to a multifunctional lithium battery diaphragm coating machine.

Background

The coating machine is mainly used for surface coating process production of films, paper and the like, and is used for coating a layer of glue, paint, ink and the like with specific functions on a coiled base film for a lithium battery diaphragm, drying and then rolling. With the continuous improvement of the technical level, the requirements on coating also tend to personalized development, and the coating modes are diversified, for example, the coating modes of a lithium battery separator, such as micro-concave coating, three-roll transfer coating, rotary screen printing spot coating and the like.

However, in the conventional coating production line, the coating mechanism and the drying mechanism are of one-to-one integrated structure, one coating machine production line can only realize one coating mode, and a whole set of production line needs to be replaced when another coating mode is needed. Therefore, the equipment cost is increased, a large amount of space is occupied, a lot of time is wasted, and the production efficiency is reduced.

Disclosure of Invention

The invention aims to provide a multifunctional lithium battery diaphragm coating machine which integrates multiple coating modes, can be compatible with different types of base films for lithium battery diaphragms, is convenient for switching the coating modes after unreeling, and meets the individual requirements of customers.

In order to solve the above technical problems, the present invention provides a multifunctional lithium battery separator coater, comprising:

the first coating mechanism and the second coating mechanism are arranged between the unreeling mechanism and the drying mechanism;

the first coating mechanism comprises a first machine frame, and a main guide component, a first auxiliary guide component, a second auxiliary guide component, a first coating component and a second coating component which are arranged on the first machine frame;

when the main guide assembly is matched with the first auxiliary guide assembly to convey the base film for the lithium battery diaphragm to pass through the first coating assembly;

when the main guide assembly is matched with the second auxiliary guide assembly to convey the base film for the lithium battery diaphragm to pass through the second coating assembly;

the first coating assembly is suitable for carrying out three-roll coating on the base film for the lithium battery diaphragm;

the second coating component is suitable for carrying out micro-concave coating on the base film for the lithium battery diaphragm;

the second coating mechanism comprises a second machine frame, and a third auxiliary guide component and a third coating component which are arranged on the second machine frame;

when the main guide assembly is matched with the third auxiliary guide assembly to convey the base film for the lithium battery diaphragm to pass through the third coating assembly;

the third coating assembly is suitable for performing rotary screen printing point coating on the base film for the lithium battery diaphragm.

Further, the first coating assembly comprises a rubber-pressing roller, a feeding roller, a transfer roller, a scraping roller and a trough; wherein

The rubber pressing roller is rotatably arranged on the first rack so as to be matched with the first auxiliary guide component to guide the base film for the lithium battery diaphragm;

the material groove is arranged on the first rack to contain the slurry for three-roller coating;

the feeding roller is rotatably arranged at the position, above the trough, of the first machine frame, and the outer edge of the lower part of the feeding roller enters slurry;

the transfer roller is arranged on the first rack in a reverse rotation mode so as to transfer the slurry attached to the outer edge of the feeding roller to the base film for the lithium battery diaphragm on the rubber-pressing roller;

the scraping roller is arranged on the first rack in a reverse rotating mode, is positioned on one side, away from the rubber pressing roller, of the transfer roller and is suitable for cleaning slurry on the outer edge of the transfer roller.

Furthermore, a servo motor is arranged on the first rack, and a transverse screw rod is connected to the servo motor;

the transverse screw rod is connected with the scraping roller;

the servo motor rotates to drive the transverse screw rod to rotate to pull the scraping roller to move, so that the distance between the scraping roller and the transfer roller is adjusted;

a first air cylinder part connected with the rubber-pressing roller is arranged on the first frame so as to adjust the distance between the rubber-pressing roller and the transfer roller;

a vertical screw rod is arranged at the bottom of the trough, and a rotary rod meshed with the vertical screw rod is arranged on the first rack;

the rotating rod rotates to drive the vertical screw rod to support the material groove to lift, so that the distance between the material groove and the feeding roller is adjusted.

Further, the second coating assembly comprises two back coating rolls, a coating roll and a closed first doctor blade cavity;

the first scraper cavity is arranged on the first frame to feed materials to the coating roller and scrape off excess materials;

the two back coating rollers are rotatably arranged on the first rack so as to be matched with the second auxiliary guide component to guide the base film for the lithium battery diaphragm;

the coating roll is arranged on the first rack in a reverse rotating mode so as to coat the slurry output by the first scraper cavity on the base film for the lithium battery diaphragm on the back coating roll.

Further, the coating roller and the first scraper cavity are arranged on the first frame through a mounting frame;

and a second cylinder piece connected with the mounting frame is arranged on the first rack so as to adjust the distance between the coating roll and the back coating roll.

Further, the third coating assembly comprises a rubber roller, a circular mesh roller and a frame body; wherein

The frame body is arranged on the second frame to convey slurry to the rotary screen roller;

the rubber roller is rotatably arranged on the second rack so as to be matched with the third auxiliary guide component to guide the base film for the lithium battery diaphragm;

the rotary screen roller is arranged on the frame body in a reverse rotating mode so as to be in running fit with the rubber roller to coat the sizing agent on the base film for the lithium battery diaphragm on the rubber roller.

Further, a self-wetting piece is arranged in the circle of the cylinder screen roller.

Further, the outer edge of the lower part of the feeding roller is positioned above the top of the trough;

a movable material storage mechanism is arranged at the position, located on one side of the feeding roller, of the first machine frame so as to convey slurry to the feeding roller;

the feeding roller, the transfer roller and the rubber pressing roller are matched to realize coating of the base film pole piece for the lithium battery diaphragm.

Further, the first coating assembly further comprises a gravure roll and a second doctor blade cavity; wherein

The gravure roller is arranged on the first rack in a rotating mode instead of the feeding roller, and the outer edge of the lower portion of the gravure roller is located above the top of the material groove;

the second scraper cavity is arranged on the material groove to feed materials to the gravure roller and scrape off excess materials;

the gravure roller, the transfer roller and the rubber pressing roller are matched to realize gravure coating of the base film for the lithium battery diaphragm.

Furthermore, tension feedback assemblies are arranged in the unwinding mechanism and the winding mechanism.

The multifunctional lithium battery diaphragm coating machine has the beneficial effects that the first coating mechanism and the second coating mechanism are arranged between the unreeling mechanism and the drying mechanism of one production line; the base film for the lithium battery diaphragm released by the unwinding mechanism is guided by the main guide assembly and then turns to different auxiliary guide assemblies, so that the base film for the lithium battery diaphragm passes through the first coating assembly, the second coating assembly or the third coating assembly, and therefore the base film for the lithium battery diaphragm can be subjected to three-roller coating, micro-concave coating or rotary screen printing spot coating on one production line. This application has assembled little concave coating, three-roller coating, three kinds of coating methods are scribbled to rotary screen printing point, the thick liquids that can compatible multiple characteristics and the lithium cell diaphragm of different grade type are with the base film, can optionally choose the coating method after unreeling and carry out the coating switching, customer's individualized demand has been satisfied, the flexibility ratio of experiment has been strengthened, the waste of thick liquids and lithium cell diaphragm with the base film in experiment or the production process has been reduced, equipment cost has been reduced, the place occupation space has been practiced thrift, the time is shortened, and the production efficiency is improved.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural view of a preferred embodiment of a multifunctional lithium battery separator coater according to the present invention;

FIG. 2 is a schematic structural view of a preferred embodiment of a first coating mechanism of the present invention;

FIG. 3 is a schematic structural view of a preferred embodiment of a second coating mechanism of the present invention;

FIG. 4 is a schematic structural view of a preferred embodiment of the first coating mechanism (three-roll transfer coating) of the present invention;

FIG. 5 is a schematic structural view of a preferred embodiment of a first coating mechanism (pole piece coating) of the present invention;

FIG. 6 is a schematic configuration diagram of a preferred embodiment of a first coating mechanism (gravure coating) of the present invention;

FIG. 7 is a schematic structural diagram of a preferred embodiment of the unwinding mechanism of the present invention;

fig. 8 is a schematic structural diagram of a preferred embodiment of the winding mechanism and the winding traction mechanism of the invention.

In the figure:

an unwinding mechanism 1;

the device comprises a first coating mechanism 2, a first frame 21, a main guide assembly 22, a first auxiliary guide assembly 23, a second auxiliary guide assembly 24, a first coating assembly 25, a pressure roller 251, a feeding roller 252, a transfer roller 253, a scraping roller 254, a material groove 255, a gravure roller 256, a second scraping cavity 257, a second coating assembly 26, a back coating roller 261, a coating roller 262 and a first scraping cavity 263;

the second coating mechanism 3, the second frame 31, the third auxiliary guide component 32, the third coating component 33, the rubber roller 331, the rotary screen roller 332 and the frame body 333;

the device comprises a drying mechanism 4, a servo motor 5, a transverse wire rod 6, a first air cylinder part 7, a vertical wire rod 8, a rotary rod 9, a mounting frame 10, a second air cylinder part 11, a self-wetting part 12, a movable storage mechanism 13, a winding mechanism 14, a tension feedback assembly 15, a winding traction mechanism 16 and a guide roller 17.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, the multifunctional lithium battery separator coater of the embodiment includes: the device comprises an unwinding mechanism 1, a drying mechanism 4, a winding traction mechanism 16 and a winding mechanism 14; a first coating mechanism 2 and a second coating mechanism 3 are arranged between the unreeling mechanism 1 and the drying mechanism 4; the first coating mechanism 2 includes a first frame 21, a main feed assembly 22, a first sub feed assembly 23, a second sub feed assembly 24, a first coating assembly 25, and a second coating assembly 26; the main guide assembly 22, the first auxiliary guide assembly 23, the second auxiliary guide assembly 24, the first coating assembly 25 and the second coating assembly 26 are all arranged on the first frame 21; when the main guide member 22 is engaged with the first sub guide member 23 to convey the base film for a lithium battery separator through the first coating member 25; when the main guide member 22 is engaged with the secondary guide member 24 to convey the base film for a lithium battery separator through the secondary coating member 26; the first coating assembly 25 is adapted to three-roll coating a base film for a lithium battery separator; the second coating module 26 is adapted to micro-gravure coat a base film for a lithium battery separator; the second coating mechanism 3 comprises a second frame 31, a third auxiliary guide assembly 32 and a third coating assembly 33, wherein the third auxiliary guide assembly 32 and the third coating assembly 33 are arranged on the second frame 31; when the main guide assembly 22 is matched with the third auxiliary guide assembly 32 to convey the base film for the lithium battery separator through the third coating assembly; the third coating module 33 is adapted to perform a rotary screen printing spot coating of the base film for a lithium battery separator. The coating device comprises a first coating mechanism 2 and a second coating mechanism 3 which are arranged between an unreeling mechanism 1 and a drying mechanism 4 of one production line; the base film for the lithium battery diaphragm released by the unwinding mechanism 1 is guided by the main guide assembly 22 and then turns to different auxiliary guide assemblies, so that the base film for the lithium battery diaphragm passes through the first coating assembly 25, the second coating assembly 26 or the third coating assembly 33, and therefore three-roller coating, micro-concave coating or rotary screen printing spot coating of the base film for the lithium battery diaphragm can be realized on one production line. This application has assembled little concave coating, three-roller coating, three kinds of coating methods are scribbled to rotary screen printing point, the thick liquids that can compatible multiple characteristics and the lithium cell diaphragm of different grade type are with the base film, can optionally choose the coating method after unreeling and carry out the coating switching, customer's individualized demand has been satisfied, the flexibility ratio of experiment has been strengthened, the waste of thick liquids and lithium cell diaphragm with the base film in experiment or the production process has been reduced, equipment cost has been reduced, the place occupation space has been practiced thrift, the time is shortened, and the production efficiency is improved.

As shown in fig. 2 and 3, in the present embodiment, specifically, each of the first sub-guide assembly 23, the second sub-guide assembly 24, and the third sub-guide assembly 32 is composed of a plurality of guide rollers rotatably disposed on the first frame 21 or the second frame 31. The diameters of the guide rollers can be consistent according to actual requirements, and the diameters of the guide rollers can be changed according to the guide position, and the diameter is not limited here.

As shown in fig. 2, in the present embodiment, it is preferable that a guide roller 17 is hinged to the top of the first frame 21, the guide roller 17 is rotated to above the first frame 21 when not needed, and the guide roller 17 is rotated to a position horizontal to the top of the first frame 21 when needed; the first sub-guide assembly 23 or the second sub-guide assembly 24 cooperates with the guide roller 17 to guide the coated product into the drying mechanism 4, so that the coated product on the first sub-guide assembly 23 or the second sub-guide assembly 24 can enter the drying mechanism 4 more smoothly and smoothly.

As shown in fig. 4, in the present embodiment, specifically, the first coating assembly 25 includes a pressure roller 251, a feeding roller 252, a transfer roller 253, a scraping roller 254, and a trough 255; wherein, the glue pressing roller 251 is rotationally arranged on the first frame 21 to cooperate with the first auxiliary guide component 23 to guide the base film for the lithium battery diaphragm; the trough 255 is arranged on the first frame 21 to contain the three-roll coating slurry; the feeding roller 252 is rotatably provided at a position above the trough 255 of the first frame 21, and the lower outer edge of the feeding roller 252 intrudes into the slurry; the transfer roller 253 is arranged on the first frame 21 in a reverse rotation mode so as to transfer the slurry attached to the outer edge of the feeding roller 252 to the base film for the lithium battery diaphragm on the pressure roller 251; the scraping roller 254 is arranged on the first frame 21 in a reverse rotation manner, and the scraping roller 254 is positioned on one side of the transfer roller 253, which is far away from the pressure roller 251, and is suitable for cleaning the slurry on the outer edge of the transfer roller 253. The material is supplied to the feeding roller 252 through the material groove 255, and three-roller transfer coating of the base film for the lithium battery diaphragm is realized through mutual cooperation of the glue pressing roller 251, the feeding roller 252 and the transfer roller 253, so that the individualized requirements of customers are met.

As shown in fig. 4, in the present embodiment, it is preferable that a servo motor 5 is provided on the first frame 21, and a traverse shaft 6 is connected to the servo motor 5; the transverse wire rod 6 is connected with the scraping roller 254; the servo motor 5 rotates to drive the transverse screw rod 6 to rotate and pull the scraping roller 254 to move, so that the distance between the scraping roller 254 and the transfer roller 253 is adjusted; the slurry which is previously contacted with the base film for the lithium battery diaphragm is effectively scraped by the scraper, so that the new slurry is effectively adhered to the transfer roller 253. The first frame 21 is provided with a first cylinder part 7 connected with the glue pressing roller 251 so as to adjust the distance between the glue pressing roller 251 and the transfer roller 253 and adjust the tension applied to the base film for the lithium battery diaphragm, thereby realizing the tension separation of the rear section of the base film for the lithium battery diaphragm. A vertical screw rod 8 is arranged at the bottom of the trough 255, and a rotary rod 9 meshed with the vertical screw rod 8 is arranged on the first rack 21; the rotating rod 9 rotates to drive the vertical screw rod 8 to support the trough 255 to lift, so that the distance between the trough 255 and the feeding roller 252 is adjusted. The outer edge of the feeding roller 252 can be fully contacted with the slurry, and can be timely adjusted along with the use condition of the slurry, so that the production requirement is met.

As shown in fig. 4, in the present embodiment, in particular, the second coating assembly 26 includes two backing rolls 261, a coating roll 262 and a closed first doctor blade chamber 263; wherein, the first scraper cavity 263 is arranged on the first frame 21 and is suitable for feeding materials to the coating roller 262 and scraping off excess materials; the two back coating rollers 261 are rotatably arranged on the first frame 21 so as to cooperate with the second auxiliary guide assembly 24 to guide the base film for the lithium battery diaphragm; the coating roll 262 is provided on the first frame 21 to be rotated in the reverse direction to coat the slurry discharged from the first doctor blade chamber 263 onto the base film for lithium battery separator on the back coating roll 261. The first scraper cavity 263 feeds materials to the coating roll 262 and scrapes off excess materials, and the back coating roll 261 and the coating roll 262 are matched with each other to realize micro-concave coating of the base film for the lithium battery diaphragm, so that the personalized requirements of customers are met.

As shown in fig. 4, in the present embodiment, it is preferable that the coating roller 262 and the first doctor blade chamber 263 are disposed on the first frame 21 via a mounting frame 10; the first frame 21 is provided with a second cylinder 11 connected to the mounting frame 10 to adjust the distance between the coating roll 262 and the back coating roll 261. The second cylinder part 11 has two strokes with different sizes, and the small stroke operation adjusts the distance between the coating roller 262 and the back coating roller 261 to be suitable for conveniently replacing the base film for the lithium battery diaphragm; the large stroke operation adjusts the spacing of the applicator roll 262 from the backing roll 261 to accommodate replacement of the doctor blade in the first doctor blade chamber 263 and cleaning of the first doctor blade chamber 263.

As shown in fig. 3, in the present embodiment, specifically, the third coating assembly 33 includes a rubber roller 331, a cylinder roller 332, and a frame body 333; wherein, a frame body 333 is provided on the second frame 31 to transfer the slurry to the cylinder roll 332; the rubber roller 331 is rotatably arranged on the second frame 31 to cooperate with the third auxiliary guide component 32 to guide the base film for the lithium battery diaphragm; the cylinder roller 332 is reversely and rotatably arranged on the frame body 333 to be matched with the rubber roller 331 in a rotating way to coat the sizing agent on the base film for the lithium battery diaphragm on the rubber roller 331. Slurry is conveyed to the rotary screen roller 332 through the frame body 333, and rotary screen printing point coating of the base film for the lithium battery diaphragm is realized through mutual matching of the rubber roller 331 and the rotary screen roller 332, so that the individualized requirements of customers are met.

As shown in fig. 3, in the present embodiment, it is preferable that the self-wetting member 12 is provided in the cylinder of the cylinder roll 332 to automatically wet the cylinder roll 332, lubricate the outer surface of the cylinder roll 332, reduce blocking, and improve the coating effect.

As shown in fig. 5, in the present embodiment, optionally, the lower outer edge of the feeding roller 252 is located above the top of the trough 255; namely, the rotating rotary rod 9 drives the vertical screw rod 8 to descend, and the trough 255 moves downwards to be far away from the feeding roller 252. A movable material storage mechanism 13 is arranged at the position of the first frame 21 on one side of the feeding roller 252 to convey slurry to the feeding roller 252; at the moment, the feeding roller 252, the transfer roller 253 and the glue pressing roller 251 are matched to realize the coating of the base film pole piece for the lithium battery diaphragm. When pole piece coating is needed, tabs need to be reserved on the two sides of the material groove 255, so the material groove 255 is not suitable for pole piece coating, the movable material storage mechanism 13 is added, and the width of the movable material storage mechanism 13 is changed so as to be better suitable for pole pieces with different widths; in addition, a movable mechanism of the scraping roller 254 is arranged on the transfer roller 253, and the position of the scraping roller 254 is adjusted to match pole piece coating with different widths, so that specific functional requirements are met.

As shown in fig. 6, in the present embodiment, the first coating assembly 25 optionally further includes a gravure roll 256 and a second doctor blade chamber 257; wherein, the position of the gravure roller 256 replacing the feeding roller 252 is rotatably arranged on the first frame 21, and the outer edge of the lower part of the gravure roller 256 is positioned above the top of the trough 255; the second scraper cavity 257 is arranged on the material groove 255 to feed the gravure roller 256 and scrape excess materials; the gravure roller 256, the transfer roller 253 and the rubber pressing roller 251 are matched to realize the gravure coating of the base film for the lithium battery diaphragm. If the production line needs gravure coating, the feeding roller 252 can be replaced by the gravure roller 256, and the second scraper cavity 257 is movably mounted on the trough 255, so that the personalized requirements are met, the coating mode is convenient to convert, and the change flexibility is higher.

As shown in fig. 7 and 8, in the present embodiment, it is preferable that a tension feedback assembly 15 is disposed in each of the unwinding mechanism 1 and the winding mechanism 14. Tension feedback subassembly 15 is that low friction cylinder control dancer roll is tension and adjusts, and the side deflection through the dancer roll comes feedback signal, confirms the current tension situation of base film for lithium cell diaphragm, and tension can arouse the dancer roll side deflection as long as the elasticity can be a bit, confirms tensile size through the dancer roll wobbling angle to adjust unwinding mechanism 1 or winding mechanism 14 unreel or rolling speed, with the different coating methods of effective cooperation, avoid appearing the tensile or accumulational phenomenon production of base film for lithium cell diaphragm.

As shown in fig. 1 and fig. 8, in the present embodiment, it is preferable to provide a rolling pulling mechanism 16 between the rolling mechanism 14 and the drying mechanism 4, so as to effectively guide the dried coated product output from the drying mechanism 4 to the rolling mechanism 14, avoid knotting and winding, and generate a certain buffering time to reduce the temperature of the dried coated product, so as to roll the dried coated product at a suitable temperature by the rolling mechanism 14, and avoid deformation of the dried coated product.

In summary, the multifunctional lithium battery separator coater of the present invention includes a first coating mechanism and a second coating mechanism between an unwinding mechanism and a drying mechanism of a production line; the base film for the lithium battery diaphragm released by the unwinding mechanism is guided by the main guide assembly and then turns to different auxiliary guide assemblies, so that the base film for the lithium battery diaphragm passes through the first coating assembly, the second coating assembly or the third coating assembly, and therefore the base film for the lithium battery diaphragm can be subjected to three-roller coating, micro-concave coating or rotary screen printing spot coating on one production line. This application has assembled little concave coating, three-roller coating, three kinds of coating methods are scribbled to rotary screen printing point, the thick liquids that can compatible multiple characteristics and the lithium cell diaphragm of different grade type are with the base film, can optionally choose the coating method after unreeling and carry out the coating switching, customer's individualized demand has been satisfied, the flexibility ratio of experiment has been strengthened, the waste of thick liquids and lithium cell diaphragm with the base film in experiment or the production process has been reduced, equipment cost has been reduced, the place occupation space has been practiced thrift, the time is shortened, and the production efficiency is improved. The material feeding roller is fed through the material groove, three-roller transfer coating of the base film for the lithium battery diaphragm is achieved through mutual matching of the rubber pressing roller, the material feeding roller and the transfer roller, and personalized requirements of customers are met. The rotating rod rotates to drive the vertical wires to support the trough to lift, so that the distance between the trough and the feeding roller is adjusted. The outer edge of the feeding roller can fully contact with the slurry, and can be adjusted in time along with the use condition of the slurry, so that the production requirement is met. The first scraper cavity is used for feeding materials to the coating roll and scraping residual materials, and the back coating roll and the coating roll are matched with each other to realize micro-concave coating of the base film for the lithium battery diaphragm, so that the individualized requirements of customers are met. Slurry is conveyed to the rotary screen roller through the frame body, and rotary screen printing point coating of the base film for the lithium battery diaphragm is realized through mutual matching of the rubber roller and the rotary screen roller, so that the individualized requirements of customers are met. When pole piece coating is needed, tabs need to be reserved on the two sides of the material groove 255, so the material groove 255 is not suitable for pole piece coating, and a movable material storage mechanism is added at the moment, and the width of the movable material storage mechanism is changed so as to better adapt to pole pieces with different widths; in addition, the movable mechanism of the scraping roller is arranged on the transfer roller, and the position of the scraping roller is adjusted to be matched with pole piece coating with different widths, so that specific functional requirements are met. If the production line needs gravure coating, can change the material loading roller into gravure roller, with the second scraper chamber remove the installation to the silo on to individualized demand has been satisfied, the coating mode conversion is convenient, and the flexibility of changing is higher. And tension feedback assemblies are arranged in the unwinding mechanism and the winding mechanism. The tension feedback assembly is characterized in that the low-friction cylinder controls the floating roller to be in tension adjustment, signals are fed back through the left-right deflection of the floating roller, the existing tension condition of the base film for the lithium battery diaphragm is determined, tension can cause the left-right deflection of the floating roller as long as the tension is a little, the size of the tension is determined through the swinging angle of the floating roller, the unreeling speed or the reeling speed of the unreeling mechanism or the reeling mechanism is adjusted, and the base film for the lithium battery diaphragm is prevented from being stretched or stacked in an effective matching mode.

The components selected for use in the present application (components not illustrated for specific structures) are all common standard components or components known to those skilled in the art, and the structure and principle thereof can be known to those skilled in the art through technical manuals or through routine experimentation.

In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.