A lithium battery electrode coating device

Abstract

This utility model discloses a lithium battery electrode coating device, including a first mounting frame and a second mounting frame. The first mounting frame has unwinding structures equidistantly arranged, and the second mounting frame has rewinding structures equidistantly arranged. A foil is placed between the unwinding and rewinding structures in the same horizontal direction. A cleaning mechanism, a coating mechanism, and a drying mechanism are sequentially arranged between the two foils, along the direction from the unwinding structure to the collecting structure. The coating mechanism of this utility model adopts a symmetrical arrangement, allowing simultaneous coating of two sets of foils, significantly improving coating efficiency, meeting the needs of large-scale production, and reducing production costs. The guide rollers guide and adhere the foil during coating, ensuring the foil remains flat and stable, guaranteeing uniformity and consistency of the coating, and avoiding uneven coating caused by foil movement or unevenness.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery electrode coating technology, specifically to a lithium battery electrode coating device. Background Technology

[0002] Currently, lithium-ion batteries are widely used in many fields such as electronic devices and new energy vehicles due to their relatively high energy density and excellent cycle performance. In the production process of lithium-ion batteries, electrode coating is an extremely critical step, and the stability of the coating process has a vital impact on battery performance.

[0003] However, existing coating equipment generally only coats a single type of foil. This single-coating method directly leads to relatively low coating efficiency. Furthermore, in the subsequent drying stage, existing coating equipment can only dry one group of coated foils, resulting in low utilization of the drying equipment. More importantly, existing coating equipment lacks the function of cleaning the foil surface before the coating operation begins. Since the foil surface may contain dust and other impurities, if not cleaned, it will seriously affect the coating effect, thus adversely impacting the overall performance of the lithium-ion battery. Utility Model Content

[0004] The purpose of this invention is to provide a lithium battery electrode coating device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a lithium battery electrode coating device, comprising a first mounting frame and a second mounting frame, wherein an unwinding structure is provided at equal intervals on the first mounting frame and a winding structure is provided at equal intervals on the second mounting frame, wherein a foil is provided between the unwinding structure and the winding structure in the same horizontal direction, and a cleaning mechanism, a coating mechanism and a drying mechanism are sequentially arranged between the two foils, wherein the cleaning mechanism, the coating mechanism and the drying mechanism are sequentially arranged along the direction from the unwinding structure to the collecting structure.

[0006] Preferably, in order to facilitate surface cleaning before foil coating and ensure surface cleanliness without affecting subsequent coating processes, the cleaning mechanism includes a collection hopper between two foils, with collection pipes on the end faces of the two collection hoppers that are close to each other, and a connecting pipe connected to one end of each collection pipe.

[0007] Preferably, in order to ensure the cleaning effect and assist in scraping and cleaning, cleaning scrapers are provided on the opposite ends of the two collection hoppers, and the cleaning scrapers are matched with the foil material.

[0008] Preferably, in order to facilitate simultaneous coating of two sets of foil materials and improve processing efficiency, the coating mechanism includes vertical plates symmetrically arranged at both ends of the foil material, coating heads matching the foil material are symmetrically arranged between the two vertical plates, liquid outlet pipes are provided inside the coating heads, and one end of the two liquid outlet pipes is connected to a liquid delivery pipe.

[0009] Preferably, in order to guide and adhere the foil during coating and ensure the coating effect and quality, guide rollers are symmetrically arranged between the two vertical plates, and the two coating heads are located between the two guide rollers.

[0010] Preferably, in order to facilitate heating and drying after coating without affecting subsequent winding and other operations, the drying mechanism includes mounting plates symmetrically arranged at both ends of the foil, and a heating and drying device is provided between the two mounting plates through a connecting plate, with the heating and drying device located between the two foils.

[0011] Preferably, in order to facilitate heating and drying after coating without affecting subsequent winding and other operations, the drying mechanism also includes a heating pipe installed inside the heating and drying device. A blower pipe is provided at one end of the heating pipe near the collecting mechanism, and an air outlet pipe is symmetrically provided at the other end of the heating pipe near the unwinding mechanism. An air outlet matching the foil material is opened on the air outlet pipe.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] By setting up a cleaning mechanism, the surface of the foil can be effectively cleaned before coating, removing dust and other impurities, ensuring the cleanliness of the foil surface during coating, thereby improving coating quality and avoiding coating defects caused by impurities.

[0014] The coating mechanism adopts a symmetrical arrangement, which can coat two sets of foils simultaneously, significantly improving coating efficiency, meeting the needs of large-scale production, and reducing production costs. The guide rollers can guide and adhere the foils during coating, ensuring that the foils remain flat and stable during the coating process, guaranteeing the uniformity and consistency of coating, and avoiding uneven coating caused by foil shaking or unevenness.

[0015] The drying unit can heat and dry the foil material in a timely and effective manner after coating, avoiding problems such as sticking during winding due to the coating layer not being dry, ensuring product quality, and at the same time not affecting subsequent winding operations, improving production efficiency and ensuring the smooth operation of the production process. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a lithium battery electrode coating device proposed in this utility model;

[0017] Figure 2This is a schematic diagram of the cleaning mechanism in a lithium battery electrode coating device proposed in this utility model;

[0018] Figure 3 This is a schematic diagram of the coating mechanism in a lithium battery electrode coating device proposed in this utility model;

[0019] Figure 4 This is a schematic diagram of the drying mechanism in a lithium battery electrode coating device proposed in this utility model.

[0020] In the diagram: 11. First mounting frame; 12. Unwinding structure; 13. Second mounting frame; 14. Rewinding structure; 15. Foil; 21. Collection hopper; 22. Connecting pipe; 23. Collection pipe; 24. Cleaning scraper; 31. Vertical plate; 32. Infusion pipe; 33. Discharge pipe; 34. Coating head; 35. Guide roller; 41. Mounting plate; 42. Connecting plate; 43. Heating and drying device; 44. Blower pipe; 45. Heating pipe; 46. Air outlet pipe; 47. Air outlet. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-4This utility model provides an embodiment of a lithium battery electrode coating device, including a first mounting frame 11 and a second mounting frame 13. The first mounting frame 11 is used to mount an unwinding structure 12, and the second mounting frame 13 is used to mount a winding structure 14. The unwinding structure 12 is a foil 15 to be coated and wound up, facilitating subsequent cleaning, coating, drying, and other operations on the foil 15. The winding structure 14 is used to wind up the coated foil 15. Foil 15 is disposed between the unwinding structure 12 and the winding structure 14 in the same horizontal direction. The unwinding structure 12 and the rewinding structure 14 can be two sets, allowing simultaneous coating of both sets of foil 15 during subsequent coating processes, thus improving processing efficiency. The foil 15 can be made of copper or aluminum foil, or other materials depending on the specific circumstances; this is a mature technology and will not be elaborated upon here. To ensure coating quality, a cleaning mechanism, a coating mechanism, and a drying mechanism are sequentially arranged between the two foils 15, along the direction from the unwinding structure 12 to the collecting structure. The coating mechanism includes vertical plates 31 symmetrically arranged at both ends of the foil 15. Two coating heads 34, matching the foil 15, are symmetrically arranged between the two vertical plates 31. Each coating head 34 is used to coat the adjacent sides of the two foils 15. Each coating head 34 has an outlet pipe 33, and one end of both outlet pipes 33 is connected to a delivery pipe 32. The delivery pipe 32 is connected to a coating storage tank (not shown in the diagram), facilitating the extraction of coating slurry into the outlet pipes 33 via a pump or similar means. The coating is then applied to the foil 15 through the coating heads 34. To ensure the coating effect, guide rollers 35 are symmetrically arranged between the two vertical plates 31. The two coating heads 34 are located between the two guide rollers 35. The guide rollers 35 are located on the uncoated side of the foil 15, i.e., the side away from each other. To ensure the guiding and bonding effect, the guide rollers 35 and the vertical plates 31 can be connected by an adjustment device (not shown in the figure). The adjustment device can be adjusted by means of electric push rods, etc., to adjust the distance between the guide rollers 35 and the foil 15, so as to ensure the guiding and bonding effect and ensure the coating of the coating head 34 is uniform.

[0023] Please see Figures 1-4To ensure the coating effect, the surface of the foil 15 is cleaned before coating to remove floating dust and other impurities. This does not affect the coating quality and allows for drying after coating without affecting subsequent winding operations. The cleaning mechanism includes a collection hopper 21 between two foils 15. Each collection hopper 21 has a collection pipe 23 on its adjacent end face. One end of each collection pipe 23 is connected to a connecting pipe 22, which is connected to a collection box (not shown in the diagram). The box contains an exhaust fan, operating on the same principle as a vacuum cleaner, to facilitate the collection of cleaned impurities. This is a mature technology and will not be elaborated upon here. Each collection hopper 21 has a cleaning scraper 24 on its distant end face. The cleaning scraper 24 is matched to the foil 15 to easily scrape the surface of the foil 15, assisting in cleaning and collection. To avoid hard contact with the foil 15 and damage, the surface of the cleaning scraper 24 is covered with a flexible material such as sponge or rubber. To allow for drying after coating, a drying mechanism is included, symmetrically arranged... The mounting plates 41 at both ends of the foil 15 are connected by a connecting plate 42. A heating and drying device 43 is provided between the two mounting plates 41. The heating can be done by electric heating or by other methods, such as heat transfer oil, depending on the actual situation. The heating and drying device 43 is located between the two foils 15 to facilitate heating and drying of the two coated sides. The drying mechanism also includes a heating tube 45 inside the heating and drying device 43, which can facilitate auxiliary heating of the gas inside the heating tube 45 to ensure hot air is blown out for auxiliary heating and drying. A blower pipe 44 is provided at the end of the heating tube 45 near the collection mechanism. The blower pipe 44 is connected to a blower or other blower device to facilitate the delivery of air into the blower pipe 44, which is then heated and blown out. This is a relatively mature technology and will not be described in detail here. A symmetrical air outlet pipe 46 is provided at the end of the heating tube 45 near the unwinding mechanism. An air outlet 47 matching the foil 15 is opened on the air outlet pipe 46 to facilitate the drying of the coated foil 15 surface.

[0024] Working principle: In use, before coating, the foil 15 is conveyed by the unwinding structure 12. The cleaning scraper 24 on the collecting hopper 21 scrapes and cleans the surface of the foil 15. Then, the collecting pipe 23, collecting hopper 21, and connecting pipe 22 collect floating dust and other impurities from the surface of the foil 15, ensuring surface cleanliness during subsequent coating. The cleaned foil 15 is then conveyed to the coating station, where the slurry is conveyed through the delivery pipe 32 and then through the outlet pipe 33. The foil 15 is coated in the coating head 34. During the coating process, the guide roller 35 guides and adheres the foil 15 to ensure the coating effect. Then, air is introduced through the blower pipe 44 and heated by the heating pipe 45 and the heating and drying device 43. The air is then blown out through the air outlet 47 of the air outlet pipe 46 to assist in heating and drying the surface of the coated foil 15. The foil 15 is then dried again by the heating and drying device 43 and finally wound up by the winding structure 14.

[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A lithium battery electrode coating apparatus, comprising a first mounting frame (11) and a second mounting frame (13), wherein the first mounting frame (11) is provided with unwinding structures (12) at equal intervals, and the second mounting frame (13) is provided with winding structures (14) at equal intervals, wherein a foil (15) is provided between the unwinding structures (12) and the winding structures (14) in the same horizontal direction, characterized in that: A cleaning mechanism, a coating mechanism, and a drying mechanism are sequentially arranged between the two foils (15), and the cleaning mechanism, coating mechanism, and drying mechanism are sequentially arranged along the direction from the unwinding structure (12) to the collecting structure.

2. The lithium battery pole piece coating device according to claim 1, wherein: The cleaning mechanism includes a collection hopper (21) between two foils (15), and a collection pipe (23) is provided on the end face of the two collection hoppers (21) that are close to each other. One end of the collection pipe (23) is connected to a connecting pipe (22).

3. The lithium battery pole piece coating device according to claim 2, wherein: The two collection hoppers (21) are provided with cleaning scrapers (24) on their far-away end faces, and the cleaning scrapers (24) are matched with the foil (15).

4. The lithium battery pole piece coating device according to claim 3, characterized in that: The coating mechanism includes vertical plates (31) symmetrically arranged at both ends of the foil (15), and coating heads (34) matching the foil (15) are symmetrically arranged between the two vertical plates (31). The coating head (34) is provided with a liquid outlet pipe (33), and one end of the two liquid outlet pipes (33) is connected to a liquid infusion pipe (32).

5. The lithium battery pole piece coating device according to claim 4, wherein: Two guide rollers (35) are symmetrically arranged between the two vertical plates (31), and two coating heads (34) are located between the two guide rollers (35).

6. The lithium battery pole piece coating device according to claim 5, wherein: The drying mechanism includes mounting plates (41) symmetrically arranged at both ends of the foil (15), and a heating and drying device (43) is provided between the two mounting plates (41) through a connecting plate (42). The heating and drying device (43) is located between the two foils (15).

7. The lithium battery pole piece coating device according to claim 6, wherein: The drying mechanism also includes a heating tube (45) installed inside the heating and drying device (43). A blower pipe (44) is provided at one end of the heating tube (45) near the collecting mechanism. An air outlet pipe (46) is symmetrically provided at one end of the heating tube (45) near the unwinding mechanism. An air outlet (47) matching the foil material (15) is opened on the air outlet pipe (46).

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