Gravure transfer printing equipment for producing lithium battery diaphragm

Abstract

The utility model belongs to the technical field of lithium battery diaphragm production, and particularly relates to gravure transfer printing equipment for producing a lithium battery diaphragm, which comprises a supporting component, a driving component, a roller shaft component and a scraper component, the supporting component comprises a trough, roller shaft brackets and a driving frame, the roller shaft brackets are arranged on two sides of the top of the trough, and the driving frame is arranged on the roller shaft bracket. A driving frame is arranged on one side of the trough; the driving part is arranged on the driving frame; the roller shaft assembly is arranged on the roller shaft support and comprises an unwinding roller, a winding roller, a pressure roller, a printing plate roller, a first gear, a second gear, a belt wheel and a belt, solid particles generated in the production process are few, and the solid particles are highly matched with a dustproof target of a clean workshop; in this way, a workshop only needs to emphatically control dust (such as outdoor air and carried by people) introduced from the outside, a large amount of dust generated by the process does not need to be additionally treated, and the difficulty and cost of clean maintenance are reduced.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery separator production technology, specifically a gravure transfer printing device for producing lithium battery separators. Background Technology

[0002] During production, the slurry is sprayed onto the base membrane in a very irregular manner. Poor particle uniformity leads to uneven porosity of the separator coating (affecting electrolyte absorption), abnormal surface roughness (increasing electrode interface impedance), and local thickness deviation (causing micro-short circuit risk). Ultimately, this manifests as accelerated battery capacity decay, shortened cycle life (e.g., a 5%-10% decrease in capacity retention after 500 cycles), and even internal short circuits caused by particle agglomeration puncturing the separator, increasing the risk of thermal runaway.

[0003] 2. During atomization, solvents and fine particles in the slurry may evaporate or disperse into the air. Solvent-based slurries often use NMP as a solvent, which generates volatile organic compounds (VOCs) after atomization, polluting the air and potentially harming worker health. Additionally, fine particles (e.g., submicron-sized) of ceramic particles or other fillers can form dust, depositing on equipment surfaces or in the air, affecting cleanliness. Lithium-ion battery production requires a highly clean environment; dust particles can cause defects in the separator coating, such as particulate impurities embedding in the coating, leading to battery short circuits. Furthermore, VOC accumulation may reach explosive limits, posing safety hazards and impacting worker health, causing respiratory problems.

[0004] To address this, a gravure transfer printing device for producing lithium battery separators is proposed. Utility Model Content

[0005] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of this section, the abstract, and the title, and such simplifications or omissions should not be used to limit the scope of this utility model.

[0006] In view of the above and / or existing problems in the production of lithium battery separators, this utility model is proposed.

[0007] Therefore, the purpose of this invention is to provide a gravure transfer printing device for producing lithium battery separators. The device generates fewer solid particles during the production process, which is highly compatible with the dust control goals of cleanrooms. This allows the workshop to focus on controlling externally introduced dust (such as outdoor air and dust carried by personnel) without having to deal with the large amount of dust generated by the process itself, thus reducing the difficulty and cost of cleanroom maintenance.

[0008] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0009] A gravure transfer printing device for producing lithium battery separators, comprising:

[0010] The supporting components include a material trough, a roller support, and a drive frame. Roller supports are provided on both sides of the top of the material trough, and a drive frame is provided on one side of the material trough.

[0011] A drive component is mounted on the drive frame;

[0012] A roller assembly is mounted on the roller support. The roller assembly includes an unwinding roller, a take-up roller, a pressure roller, a printing plate roller, a first gear, a second gear, pulleys, and a belt. The end of the printing plate roller is provided with a first gear connected to a drive component. The end of the pressure roller is provided with a second gear that meshes with the first gear. Both the second gear and the outer end of the take-up roller are provided with pulleys, and a belt is connected between the pulleys.

[0013] A scraper component is disposed on the side of the feed trough.

[0014] As a preferred embodiment of the gravure transfer printing equipment for producing lithium battery separators according to this utility model, the material tank sidewall is provided with a drying mechanism, the drying mechanism includes a rotating bracket, a positioning bolt, an air pipe, an air outlet, a third gear and an impeller, the rotating bracket is screwed to the material tank sidewall, the upper end of the rotating bracket is rotatably connected to the air pipe, the top of the rotating bracket is provided with a positioning bolt in contact with the air pipe, the sidewall of the air pipe is provided with evenly distributed air outlets, the inner side of the end of the air pipe is rotatably connected to the third gear, and an impeller is coaxially provided on the third gear.

[0015] As a preferred embodiment of the gravure transfer printing equipment for producing lithium battery separators according to this utility model, the driving component includes a driving motor and a driving gear, the driving motor is fixed on the driving frame, and the driving gear is provided at the output end of the driving motor.

[0016] As a preferred embodiment of the gravure transfer printing equipment for producing lithium battery separators according to this utility model, the doctor blade component includes a doctor blade holder and a doctor blade. The doctor blade holder is screwed to the side wall of the material trough, and the doctor blade is provided at the upper end of the doctor blade holder to contact the printing plate roller.

[0017] In a preferred embodiment of the gravure transfer printing equipment for producing lithium battery separators described in this utility model, support plates are provided at the bottom of both ends of the material tank, and anti-slip pads are provided at the bottom of each support plate.

[0018] As a preferred embodiment of the gravure transfer printing equipment for producing lithium battery separators according to this utility model, wherein: the roller support is provided with an opening groove, and the unwinding roller, the winding roller, the pressure roller, and the printing plate roller are all provided on the opening groove.

[0019] In a preferred embodiment of the gravure transfer printing equipment for producing lithium battery separators described in this utility model, the third gear meshes with the first gear.

[0020] Compared with existing technologies, this invention places the lithium battery separator on a roller assembly for winding. During the winding process, the lithium battery separator is gravure-transferred using a printing roller. Compared with existing spraying methods, this reduces the mixed pollution of dust and volatile substances in the workshop. Compared with open spraying, gravure transfer has a lower risk of pollutant diffusion, indirectly reducing the air purification load of the cleanroom. The production process generates less solid particulate matter, which is highly consistent with the dust prevention target of the cleanroom. This allows the workshop to focus on controlling externally introduced dust (such as outdoor air and dust carried by personnel) without having to deal with the large amount of dust generated by the process itself, thus reducing the difficulty and cost of cleanroom maintenance. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0022] Figure 1 This is a schematic diagram of the axonal structure of the present invention;

[0023] Figure 2 This is a side view of the structure of this utility model;

[0024] Figure 3 This is a schematic diagram of the supporting component structure of this utility model;

[0025] Figure 4 This is a schematic diagram of the roller assembly structure of this utility model;

[0026] Figure 5 This is a schematic diagram of the air-drying mechanism of this utility model.

[0027] In the diagram: 100 Support component, 110 Material trough, 120 Roller shaft bracket, 121 Opening slot, 130 Drive frame, 200 Drive component, 210 Drive motor, 220 Drive gear, 300 Roller shaft assembly, 310 Unwinding roller, 320 Rewinding roller, 330 Pressure roller, 340 Printing plate roller, 350 First gear, 360 Second gear, 370 Pulley, 380 Belt, 400 Scraper assembly, 410 Scraper holder, 420 Scraper, 500 Drying mechanism, 510 Rotating bracket, 511 Positioning bolt, 520 Air pipe, 530 Air outlet, 540 Third gear, 550 Impeller. Detailed Implementation

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0032] This invention provides a gravure transfer printing device for producing lithium battery separators that generates relatively few solid particles during production, perfectly aligning with the dust control goals of cleanrooms. This allows the workshop to focus on controlling externally introduced dust (such as outdoor air and dust carried by personnel) without needing to handle the large amounts of dust generated by the process itself, thus reducing the difficulty and cost of cleanroom maintenance. Please refer to [link / reference]. Figures 1-5 It includes: a support component 100, a drive component 200, a roller assembly 300, and a scraper component 400.

[0033] The support component 100 includes a material trough 110, a roller support 120 and a drive frame 130. Roller supports 120 are provided on both sides of the top of the material trough 110, and a drive frame 130 is provided on one side of the material trough 110.

[0034] The material trough 110 stores the slurry, and the roller support 120 adopts a T-shaped support to provide rotational support.

[0035] The drive component 200 is mounted on the drive frame 130. The drive component 200 includes a drive motor 210 and a drive gear 220. The drive motor 210 is fixed on the drive frame 130, and the drive gear 220 is mounted on the output end of the drive motor 210. The drive motor 210 drives the drive gear 220 to rotate.

[0036] The roller assembly 300 is mounted on the roller support 120. The roller assembly 300 includes an unwinding roller 310, a take-up roller 320, a pressure roller 330, a printing plate roller 340, a first gear 350, a second gear 360, a pulley 370, and a belt 380. The printing plate roller 340 is provided with a first gear 350 connected to the drive component 200 at its end. The pressure roller 330 is provided with a second gear 360 meshing with the first gear 350 at its end. The second gear 360 and the take-up roller 320 are both provided with pulleys 370 at their outer ends. The belt 380 connects the pulleys 370.

[0037] In this process, the drive gear 220 drives the first gear 350 to rotate, the first gear 350 drives the printing plate roller 340 to rotate, and at the same time, the first gear 350 drives the second gear 360 to rotate, the second gear 360 synchronously drives the pressure roller 330 to rotate, the second gear 360 synchronously drives the pulley 370 to rotate, and the pulley 370 drives the take-up roller 320 to rotate via the belt 380. The lithium battery separator is wound on the unwinding roller 310, passes between the pressure roller 330 and the printing plate roller 340, and then is wound on the take-up roller 320 for winding, thereby realizing the gravure transfer of the lithium battery separator.

[0038] The scraper component 400 is disposed on the side of the material trough 110. The scraper component 400 includes a blade holder 410 and a scraper 420. The blade holder 410 is screwed to the side wall of the material trough 110. The upper end of the blade holder 410 is provided with a scraper 420 that contacts the printing plate roller 340, which is used to scrape off excess paste from the outer wall of the printing plate roller 340.

[0039] A drying mechanism 500 is provided on the side wall of the material trough 110. The drying mechanism 500 includes a rotating bracket 510, a positioning bolt 511, an air pipe 520, an air outlet 530, a third gear 540, and an impeller 550. The rotating bracket 510 is screwed to the side wall of the material trough 110. The upper end of the rotating bracket 510 is rotatably connected to the air pipe 520. The top of the rotating bracket 510 is provided with a positioning bolt 511 that contacts the air pipe 520. The side wall of the air pipe 520 is provided with evenly distributed air outlets 530. The inner side of the end of the air pipe 520 is rotatably connected to the third gear 540. The impeller 550 is coaxially arranged on the third gear 540.

[0040] Rotate the air pipe 520 to change the position of its end. After rotation, fix the air pipe 520 with the positioning bolt 511 so that the third gear 540 meshes with the first gear 350. The first gear 350 drives the third gear 540 to rotate, and the third gear 540 drives the impeller 550 to rotate, thereby driving the airflow. The airflow blows through the air pipe 520 and the air outlet 530 onto the printed diaphragm, so that the paste on it dries quickly. Remove the rotating bracket 510 to replace the roller assembly 300.

[0041] Support plates are provided at the bottom of both ends of the material trough 110, and anti-slip pads are provided at the bottom of the support plates to improve placement stability.

[0042] The roller support 120 is provided with an opening slot 121, and the unwinding roller 310, the winding roller 320, the pressure roller 330, and the printing plate roller 340 are all provided on the opening slot 121.

[0043] In practical use, the drive motor 210 drives the drive gear 220 to rotate, the drive gear 220 drives the first gear 350 to rotate, the first gear 350 drives the printing plate roller 340 to rotate, and at the same time the first gear 350 drives the second gear 360 to rotate, the second gear 360 synchronously drives the pressure roller 330 to rotate, the second gear 360 synchronously drives the pulley 370 to rotate, the pulley 370 drives the take-up roller 320 to rotate via the belt 380. The lithium battery separator is wound on the unwinding roller 310, passes between the pressure roller 330 and the printing plate roller 340, and then winds around the take-up roller 320 to achieve gravure transfer of the lithium battery separator. The first gear 350 drives the third gear 540 to rotate, the third gear 540 drives the impeller 550 to rotate, thereby driving airflow. The airflow blows onto the printed separator through the air pipe 520 and the air outlet 530, so that the paste on it dries quickly.

[0044] 1. Gravure transfer printing uses electronic engraving, laser engraving, or etching to create pits / grooves on the roller surface (groove shapes can be customized according to production needs), with precision down to the micrometer level in depth, width, and shape. During printing, the entire gravure plate is coated first, then a doctor blade removes the paste from the blank areas (raised parts), leaving only the paste within the pits. This "subtractive" paste transfer method ensures that the paste adheres only to the grooved areas, and the paste volume is entirely determined by the pit volume, preventing paste penetration or diffusion in non-grooved areas and guaranteeing the consistency of particles required for coating from the source.

[0045] 2. Gravure transfer printing's material supply system (such as slurry tanks and circulation pipes) is typically a closed design, reducing the mixing and contamination of dust and volatile substances within the workshop. Compared to open-type spraying, gravure transfer printing carries a lower risk of contaminant diffusion, indirectly reducing the air purification load on the cleanroom. Gravure transfer printing generates relatively few solid particles during production, which aligns perfectly with the dust control goals of cleanrooms. This allows the workshop to focus on controlling externally introduced dust (such as outdoor air and dust carried by personnel) without needing to handle the large amounts of dust generated by the process itself, reducing the difficulty and cost of cleanroom maintenance.

[0046] 3. Gravure transfer printing employs a dual-cylinder structure consisting of a printing plate cylinder and an impression cylinder. The recesses on the surface of the printing plate cylinder directly support the printing paste. This direct-contact printing method, combined with a high-precision synchronous control system driven by a motor, enables printing speeds of 60-300 m / min. The printing paste tank in gravure transfer printing features a fully or semi-enclosed design, with a pump circulating the paste to continuously replenish it during high-speed operation, preventing downtime caused by manual feeding or blockages in the material supply lines.

[0047] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A gravure transfer printing device for producing lithium battery separators, characterized in that, include: The support component (100) includes a material trough (110), a roller bracket (120) and a drive frame (130). The roller brackets (120) are provided on both sides of the top of the material trough (110), and the drive frame (130) is provided on one side of the material trough (110). A drive component (200) is disposed on the drive frame (130); A roller assembly (300) is disposed on the roller support (120). The roller assembly (300) includes an unwinding roller (310), a take-up roller (320), a pressure roller (330), a printing plate roller (340), a first gear (350), a second gear (360), a pulley (370), and a belt (380). The printing plate roller (340) is provided with a first gear (350) connected to a drive component (200) at its end. The pressure roller (330) is provided with a second gear (360) meshing with the first gear (350) at its end. The second gear (360) and the take-up roller (320) are both provided with pulleys (370) at their outer ends. The belt (380) connects the pulleys (370). A scraper component (400) is disposed on the side of the feed trough (110).

2. The gravure transfer printing equipment for producing lithium battery separators according to claim 1, characterized in that, The side wall of the trough (110) is provided with a drying mechanism (500). The drying mechanism (500) includes a rotating bracket (510), a positioning bolt (511), an air pipe (520), an air outlet (530), a third gear (540), and an impeller (550). The rotating bracket (510) is screwed to the side wall of the trough (110). The upper end of the rotating bracket (510) is rotatably connected to the air pipe (520). The top of the rotating bracket (510) is provided with a positioning bolt (511) that contacts the air pipe (520). The side wall of the air pipe (520) is provided with evenly distributed air outlets (530). The inner side of the end of the air pipe (520) is rotatably connected to the third gear (540). The impeller (550) is coaxially arranged on the third gear (540).

3. The gravure transfer printing equipment for producing lithium battery separators according to claim 1, characterized in that, The drive component (200) includes a drive motor (210) and a drive gear (220). The drive motor (210) is fixed on the drive frame (130), and the drive gear (220) is provided at the output end of the drive motor (210).

4. The gravure transfer printing equipment for producing lithium battery separators according to claim 1, characterized in that, The scraper component (400) includes a blade holder (410) and a scraper (420). The blade holder (410) is screwed to the side wall of the material trough (110), and the upper end of the blade holder (410) is provided with a scraper (420) that contacts the printing plate roller (340).

5. A gravure transfer printing device for producing lithium battery separators according to claim 1, characterized in that, Both ends of the feed trough (110) are provided with support plates at the bottom, and the bottom of the support plates is provided with anti-slip pads.

6. A gravure transfer printing device for producing lithium battery separators according to claim 1, characterized in that, The roller support (120) is provided with an opening groove (121), and the unwinding roller (310), the winding roller (320), the pressure roller (330), and the printing plate roller (340) are all provided on the opening groove (121).

7. A gravure transfer printing device for producing lithium battery separators according to claim 2, characterized in that, The third gear (540) meshes with the first gear (350).

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