A coating device for lithium battery production

Abstract

The utility model discloses a kind of coating devices for lithium battery production, belong to lithium battery production equipment technical field, including device base, unwinding structure, coating structure and winding structure;The unwinding structure includes two unwinding supports, two electric supports and two front guide supports, two The unwinding support is fixedly connected in the front of the outer surface of device base, two The electric support and two front guide support are fixedly connected in the top of the outer surface of device base;The coating structure includes support outer frame, the top of support outer frame is fixedly connected with stirring barrel, the inner side of the bottom of support outer frame is fixedly connected with fixed round block in the center, the bottom of fixed round block is fixedly connected with hydraulic cylinder, the right and left sides of the outer surface of support outer frame are respectively fixedly connected with driving motor in the center;The present technical scheme solves the problem that the coating device in the prior art is prone to deviation, wrinkling or even breaking during transmission.

Description

Technical Field

[0001] This utility model belongs to the technical field of lithium battery production equipment, specifically relating to a coating device for lithium battery production. Background Technology

[0002] In the lithium battery production process, electrode preparation is one of the key steps. Traditional electrode coating equipment has several problems in practical use, such as uneven coating thickness, unstable tension, low drying efficiency, and limited production efficiency. In addition, existing equipment generally lacks online detection and closed-loop feedback systems, leading to frequent manual intervention, which affects production consistency and yield. Therefore, developing a coating device with a reasonable structure, precise control, and high coating quality has become an important means to improve the level of lithium battery manufacturing technology. As an important part of the new energy field, lithium batteries are widely used in various scenarios such as consumer electronics, power batteries, and energy storage systems. In the lithium battery manufacturing process, the electrode preparation process is particularly critical, especially the slurry coating process of positive and negative electrodes. Its coating uniformity, stability, and equipment operating efficiency directly affect the energy density, consistency, and overall performance of the battery.

[0003] In some existing devices, the substrate is prone to wrinkling or even breaking during transport, the slurry mixing and conveying mechanism is imperfect, and the coating head structure is fixed and inconvenient to adjust, resulting in uneven slurry distribution. Therefore, a coating device for lithium battery production is needed to solve the problems existing in the prior art. Utility Model Content

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

[0005] To achieve the above objectives, the present invention provides the following technical solution: a coating device for lithium battery production, comprising a device base, an unwinding structure, a coating structure, and a winding structure; the unwinding structure comprises two unwinding supports, two electric supports, and two front guide supports, the two unwinding supports being fixedly connected at the front of the outer surface of the device base, and the two electric supports and the two front guide supports being fixedly connected at the top of the outer surface of the device base.

[0006] The coating structure includes a supporting outer frame, a mixing tank is fixedly connected to the top of the supporting outer frame, a fixing block is fixedly connected to the inner center of the bottom of the supporting outer frame, a hydraulic cylinder is fixedly connected to the bottom of the fixing block, and drive motors are fixedly connected to the center of the left and right sides of the outer surface of the supporting outer frame, respectively; the winding structure includes two support frames, a blocking support frame, two rear guide brackets and two winding brackets, the two support frames, the blocking support frame and the two rear guide brackets are all fixedly connected to the top of the outer surface, and the two winding brackets are fixedly connected to the rear of the outer surface of the device base.

[0007] In a preferred embodiment, unwinding rollers are rotatably connected to the inner top of the two unwinding supports, support rods are fixedly connected to the output ends of the two electric supports, adjusting rollers are rotatably connected to the inner top of the two support rods, and upper front guide rollers and lower front guide rollers are rotatably connected to the inner top of the two front guide supports, with the upper front guide roller positioned at the top of the lower front guide roller.

[0008] In a preferred embodiment, a stirring motor is fixedly connected to the center of the top of the stirring tank, a rotating rod is fixedly connected to the output end of the stirring motor, and a plurality of stirring rods arranged in a rectangular array are fixedly connected to the outer surface of the rotating rod. A liquid inlet pipe is fixedly connected to the upper right corner of the top of the stirring tank, a pressure pump is fixedly connected to the right side of the top of the supporting frame, a liquid outlet pipe is fixedly connected to the left side of the outer surface of the pressure pump, the top of the liquid outlet pipe is connected to the interior of the stirring tank, and a liquid guide pipe is fixedly connected to the bottom output end of the pressure pump.

[0009] In a preferred embodiment, a connecting column is fixedly connected to the bottom output end of the hydraulic cylinder, and an application frame is rotatably connected to the bottom end of the connecting column. A plurality of application heads arranged in a rectangular array are fixedly connected to the bottom end of the application frame, and the liquid guide tube passes through the top plate of the supporting outer frame and is fixedly connected to the connecting column.

[0010] In a preferred embodiment, the output end of the drive motor is fixedly connected to a rotating shaft, the outer surface of the rotating shaft is fixedly connected to a fixed outer ring, the outer surface of the fixed outer ring is fixedly connected to a plurality of fan blades arranged in a ring array, the left and right sides of the inner surface of the supporting outer frame are respectively fixedly connected to protective outer rings, and the plurality of fan blades are arranged inside the protective outer rings.

[0011] In a preferred embodiment, a transmission roller is rotatably connected to the inner top of the two support frames, a conveying port is opened on the outer surface of the blocking support frame, a fixed bracket is fixedly connected to the top of the blocking support frame, hydraulic rods are fixedly connected to the left and right sides of the bottom of the fixed bracket, support rods are fixedly connected to the output ends of the two hydraulic rods, and pressure rollers are rotatably connected to the inner bottom of the two support rods.

[0012] In a preferred embodiment, a rear guide upper roller and a rear guide lower roller are rotatably connected to the inner top of the two rear guide brackets, with the rear guide upper roller positioned at the top of the rear guide lower roller, and a take-up roller is rotatably connected to the inner top of the two take-up brackets.

[0013] Compared with the prior art, the advantages of this utility model are:

[0014] 1. By setting up front and rear guide rollers and lower rollers, adjusting rollers and multiple supports, the tension of the substrate during the conveying process can be effectively controlled and the substrate can run smoothly, avoiding problems such as deviation and wrinkles, and ensuring coating quality.

[0015] 2. The pressure roller structure controlled by hydraulic rods enhances the winding tension, prevents the electrode sheets from loosening or shifting, and improves the consistency and automation compatibility of subsequent winding processes. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the left side front view of the present invention.

[0018] Figure 3 This is a front view of the internal structure of the supporting outer frame of this utility model.

[0019] Figure 4 This is a schematic diagram of the internal side view of the supporting outer frame of this utility model.

[0020] Figure 5 This is a schematic diagram of the internal structure of the mixing tank of this utility model.

[0021] In the diagram: 1. Device base; 2. Unwinding bracket; 3. Unwinding roller; 4. Electric support; 5. Support column; 6. Adjusting roller; 7. Front guide bracket; 8. Upper front guide roller; 9. Lower front guide roller; 10. Support frame; 11. Mixing tank; 12. Mixing motor; 13. Rotating rod; 14. Mixing rod; 15. Liquid inlet pipe; 16. Pressure pump; 17. Liquid outlet pipe; 18. Liquid guide pipe; 19. Fixing block; 20. Hydraulic cylinder; 21. Connecting column; 22. Spreading frame; 23. 24. Coating head; 25. Drive motor; 26. Rotating shaft; 27. Fixed outer ring; 28. Fan blade; 29. ​​Protective outer ring; 30. Support plate; 31. Transmission roller; 32. Blocking support frame; 33. Conveying port; 34. Fixed bracket; 35. Hydraulic rod; 36. Support rod; 37. Pressure roller; 38. Rear guide bracket; 39. Rear guide upper roller; 40. Rear guide lower roller; 41. Rewinding bracket; 42. Rewinding roller; 43. Unwinding structure; 44. Coating structure; 45. Rewinding structure. Detailed Implementation

[0022] The present invention will be further described below with reference to the embodiments.

[0023] Please see Figure 1-5This utility model provides a coating device for lithium battery production, including a device base 1, an unwinding structure 42, a coating structure 43, and a winding structure 44. The unwinding structure 42 includes two unwinding supports 2, two electric supports 4, and two front guide supports 7. The two unwinding supports 2 are fixedly connected to the front of the outer surface of the device base 1, and the two electric supports 4 and the two front guide supports 7 are fixedly connected to the top of the outer surface of the device base 1. The coating structure 43 includes a supporting frame 10, and a mixing tank 11 is fixedly connected to the top of the supporting frame 10. A fixed circular block 19 is fixedly connected to the inner center of the bottom end of the support frame 10. A hydraulic cylinder 20 is fixedly connected to the bottom end of the fixed circular block 19. A drive motor 24 is fixedly connected to the center of the left and right sides of the outer surface of the support frame 10. The winding structure 44 includes two support plates 29, a blocking support frame 31, two rear guide brackets 37 and two winding brackets 40. The two support plates 29, the blocking support frame 31 and the two rear guide brackets 37 are all fixedly connected to the top of the outer surface. The two winding brackets 40 are fixedly connected to the rear of the outer surface of the device base 1.

[0024] Further as Figure 1 and Figure 2 As shown, it is worth noting that unwinding rollers 3 are rotatably connected to the inner top of the two unwinding brackets 2, support columns 5 are fixedly connected to the output ends of the two electric brackets 4, adjustment rollers 6 are rotatably connected to the inner top of the two support columns 5, and front guide upper rollers 8 and front guide lower rollers 9 are rotatably connected to the inner top of the two front guide brackets 7, with the front guide upper roller 8 positioned at the top of the front guide lower roller 9.

[0025] Further as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, it is worth noting that a stirring motor 12 is fixedly connected to the center of the top of the mixing tank 11. A rotating rod 13 is fixedly connected to the output end of the stirring motor 12. Several stirring rods 14 arranged in a rectangular array are fixedly connected to the outer surface of the rotating rod 13. A liquid inlet pipe 15 is fixedly connected to the upper right corner of the top of the mixing tank 11. A pressure pump 16 is fixedly connected to the right side of the top of the supporting frame 10. A liquid outlet pipe 17 is fixedly connected to the left side of the outer surface of the pressure pump 16. The top of the liquid outlet pipe 17 is connected to the interior of the mixing tank 11. A liquid guide pipe 18 is fixedly connected to the bottom output end of the pressure pump 16. The mixing tank 11, together with the rectangular array of stirring rods 14, ensures that the slurry is fully and evenly mixed. At the same time, the pressure pump 16 and the liquid guide system can achieve continuous and stable material supply, avoiding fluctuations in electrode performance caused by uneven slurry.

[0026] Further as Figure 1 and Figure 3As shown, it is worth noting that the bottom output end of the hydraulic cylinder 20 is fixedly connected to a connecting column 21. An opening is provided at the bottom of the connecting column 21, which communicates with the interior of the coating frame 22. The bottom end of the connecting column 21 is rotatably connected to the coating frame 22. The bottom end of the coating frame 22 is fixedly connected to several coating heads 23 arranged in a rectangular array. The liquid guide tube 18 passes through the top plate of the supporting outer frame 10 and is fixedly connected to the connecting column 21. With the coating frame 22 driven by the hydraulic cylinder 20 and multiple sets of coating heads 23, and in conjunction with the structure of the connecting column 21, the coating thickness and pressure can be flexibly adjusted according to actual needs to improve the uniformity of slurry distribution.

[0027] Further as Figure 1 and Figure 4 As shown, it is worth noting that the output end of the drive motor 24 is fixedly connected to a rotating shaft 25, the outer surface of the rotating shaft 25 is fixedly connected to a fixed outer ring 26, and the outer surface of the fixed outer ring 26 is fixedly connected to a plurality of fan blades 27 arranged in a ring array. The inner surface of the supporting frame 10 is fixedly connected to protective outer rings 28 on the left and right sides respectively. The plurality of fan blades 27 are arranged inside the protective outer rings 28. The drive motor 24 drives the fan blades 27 to rotate, and the protective outer rings 28 are set to improve the heat dissipation and drying efficiency of the device and increase the production speed.

[0028] Further as Figure 1 and Figure 2 As shown, it is worth noting that the inner top of the two support plates 29 is rotatably connected to the transmission rollers 30, the outer surface of the blocking support frame 31 is provided with a conveying port 32, the top of the blocking support frame 31 is fixedly connected to the fixed bracket 33, the bottom left and right sides of the fixed bracket 33 are respectively fixedly connected to the hydraulic rods 34, the output ends of the two hydraulic rods 34 are respectively fixedly connected to the support rods 35, and the inner bottom of the two support rods 35 is rotatably connected to the pressure rollers 36. The pressure rollers 36 structure controlled by the hydraulic rods 34 enhance the winding tension, prevent the electrode sheet from loosening or shifting, and improve the consistency and automation compatibility of subsequent winding processes.

[0029] Further as Figure 1 and Figure 2 As shown, it is worth noting that the upper rear guide roller 38 and the lower rear guide roller 39 are rotatably connected to the inner top of the two rear guide brackets 37. The upper rear guide roller 38 is located at the top of the lower rear guide roller 39. The inner top of the two take-up brackets 40 is rotatably connected to the take-up roller 41. By setting the upper front guide roller 8, the lower rear guide roller 39, and the adjusting roller 6, the tension of the substrate during the conveying process can be effectively controlled and the substrate can run smoothly, avoiding problems such as deviation and wrinkles, and ensuring the coating quality.

[0030] The solution has the following working process: First, the lithium battery electrode substrate is installed on the unwinding rollers 3 on two unwinding brackets 2. Under the drive of the electric bracket 4, the support column 5 and the adjusting roller 6 drive the substrate to pass through the front guide upper roller 8 and the front guide lower roller 9 in sequence to achieve tension adjustment and direction guidance. The stirring motor 12 drives the rotating rod 13 to rotate, driving multiple stirring rods 14 to fully mix the slurry in the mixing tank 11. The mixed slurry is transported to the liquid guide pipe 18 through the liquid outlet pipe 17 by the pressure pump 16 and injected into the coating head 23 located on the connecting column 21. Under the push of the hydraulic cylinder 20, the coating frame 22 drives the coating head 23 to contact the substrate surface downward and complete the uniform coating operation by moving laterally. During the coating process, the liquid guide pipe 18 maintains a continuous supply of slurry to ensure continuous operation. Two drive motors 24 drive the fan blades 27 to rotate, generating airflow to assist in the initial drying of the coating. The protective outer ring 28 ensures operational safety and guides the airflow direction, improving efficiency. After coating, the electrode sheets pass sequentially through the drive roller 30, pressure roller 36, upper rear guide roller 38, and lower rear guide roller 39, and are wound into a roll at the winding roller 41 on the winding bracket 40 for use in subsequent processes. During the winding process, the pressure provided by the hydraulic rod 34 controls the tension of the pressure roller 36 to prevent the electrode sheets from loosening.

[0031] As can be seen from the above working process, by setting up front and rear guide rollers and lower rollers, adjusting rollers and multiple supports, the tension and smooth operation of the substrate during the conveying process can be effectively controlled, avoiding problems such as deviation and wrinkles, and ensuring coating quality. The pressure roller structure controlled by hydraulic rods enhances the winding tension, avoids loosening or deviation of the electrode sheet, and improves the consistency and automation compatibility of subsequent winding processes.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A coating apparatus for lithium battery production, characterized in that: It includes a device base (1), an unwinding structure (42), a coating structure (43), and a winding structure (44). The unwinding structure (42) includes two unwinding brackets (2), two electric brackets (4) and two front guide brackets (7). The two unwinding brackets (2) are fixedly connected in front of the outer surface of the device base (1), and the two electric brackets (4) and the two front guide brackets (7) are fixedly connected at the top of the outer surface of the device base (1). The coating structure (43) includes a supporting frame (10), a mixing tank (11) is fixedly connected to the top of the supporting frame (10), a fixed round block (19) is fixedly connected to the inner center of the bottom end of the supporting frame (10), a hydraulic cylinder (20) is fixedly connected to the bottom end of the fixed round block (19), a connecting column (21) is fixedly connected to the bottom output end of the hydraulic cylinder (20), a coating frame (22) is rotatably connected to the bottom end of the connecting column (21), and a drive motor (24) is fixedly connected to the center of the left and right sides of the outer surface of the supporting frame (10). The winding structure (44) includes two support plates (29), a blocking support frame (31), two rear guide brackets (37) and two winding brackets (40). The two support plates (29), the blocking support frame (31) and the two rear guide brackets (37) are all fixedly connected at the top of the outer surface, and the two winding brackets (40) are fixedly connected directly behind the outer surface of the device base (1).

2. The coating apparatus for lithium battery production according to claim 1, characterized in that: The top inner sides of the two unwinding brackets (2) are rotatably connected to unwinding rollers (3), the output ends of the two electric brackets (4) are respectively fixedly connected to support columns (5), the top inner sides of the two support columns (5) are rotatably connected to adjusting rollers (6), the top inner sides of the two front guide brackets (7) are rotatably connected to front guide upper rollers (8) and front guide lower rollers (9), and the front guide upper rollers (8) are set at the top of the front guide lower rollers (9).

3. The coating apparatus for lithium battery production according to claim 1, characterized in that: A stirring motor (12) is fixedly connected to the center of the top of the stirring tank (11). A rotating rod (13) is fixedly connected to the output end of the stirring motor (12). Several stirring rods (14) arranged in a rectangular array are fixedly connected to the outer surface of the rotating rod (13). A liquid inlet pipe (15) is fixedly connected to the upper right corner of the top of the stirring tank (11). A pressure pump (16) is fixedly connected to the right side of the top of the supporting frame (10). A liquid outlet pipe (17) is fixedly connected to the left side of the outer surface of the pressure pump (16). The top of the liquid outlet pipe (17) is connected to the interior of the stirring tank (11). A liquid guide pipe (18) is fixedly connected to the bottom output end of the pressure pump (16).

4. The coating apparatus for lithium battery production according to claim 3, characterized in that: The bottom end of the application frame (22) is fixedly connected to a plurality of application heads (23) arranged in a rectangular array, and the liquid guide tube (18) passes through the top plate of the supporting outer frame (10) and is fixedly connected to the connecting column (21).

5. A coating apparatus for lithium battery production according to claim 3, characterized in that: The output end of the drive motor (24) is fixedly connected to a rotating shaft (25), and a fixed outer ring (26) is fixedly connected to the outer surface of the rotating shaft (25). A plurality of fan blades (27) arranged in a ring array are fixedly connected to the outer surface of the fixed outer ring (26). Protective outer rings (28) are fixedly connected to the left and right sides of the inner surface of the support frame (10). A plurality of fan blades (27) are arranged inside the protective outer ring (28).

6. The coating apparatus for lithium battery production according to claim 1, characterized in that: A transmission roller (30) is rotatably connected to the inner top of the two support plates (29). A conveying port (32) is opened on the outer surface of the blocking support frame (31). A fixed bracket (33) is fixedly connected to the top of the blocking support frame (31). Hydraulic rods (34) are fixedly connected to the left and right sides of the bottom of the fixed bracket (33). Support rods (35) are fixedly connected to the output ends of the two hydraulic rods (34). Pressure rollers (36) are rotatably connected to the inner bottom of the two support rods (35).

7. The coating apparatus for lithium battery production according to claim 1, characterized in that: The upper rear guide roller (38) and the lower rear guide roller (39) are rotatably connected to the inner top of the two rear guide brackets (37). The upper rear guide roller (38) is located at the top of the lower rear guide roller (39). The inner top of the two take-up brackets (40) are rotatably connected to the take-up roller (41).

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