Continuous calendering all-in-one machine for dry-method pole piece preparation
The continuous calendering machine for dry electrode preparation, using four-roll rolling and servo motor drive, simplifies the equipment structure and improves film formation efficiency. It solves the problems of complex equipment and difficult thickness control in existing technologies, and improves the stability and film formation rate of electrode films.
Patent Information
- Application Number
- CN202423273585.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing dry electrode film preparation processes suffer from problems such as complex equipment structure, difficult debugging, inability to accurately control electrode film thickness, high resistance, poor adaptability, and low film formation rate.
The continuous calendering machine for dry electrode preparation adopts an integrated design of initial film formation, thinning, and finishing rolling. It uses four-roll rolling and servo motor drive, and achieves continuous rolling through initial cutting and finishing cutting mechanisms. It controls the roll gap and roll surface temperature to ensure the stability and accuracy of the film.
The equipment structure was simplified, the debugging difficulty was reduced, the film formation efficiency and stability were improved, the thickness control and film formation rate of the electrode film were ensured, and the resistance and adaptability of the electrode film were enhanced.
Smart Images
Figure CN223618297U_ABST
Abstract
Description
Technical Field
[0001] This utility model specifically relates to the field of calendering technology, and more specifically to a continuous calendering integrated machine for dry electrode preparation. Background Technology
[0002] Dry electrode film fabrication is a solvent-free lithium-ion battery electrode fabrication technology with advantages such as simplicity and environmental friendliness. However, existing dry electrode film fabrication processes have the following drawbacks:
[0003] 1. The film-forming, thinning, and finishing rolling equipment operate separately, resulting in a complex structure and difficult debugging;
[0004] 2. The thickness of the electrode film cannot be precisely controlled, resulting in problems such as high resistance, poor adaptability, and low film formation rate in the produced electrode films. Utility Model Content
[0005] Therefore, this utility model proposes a continuous calendering machine for dry electrode preparation to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a continuous calendering machine for dry electrode preparation, comprising:
[0007] The base has two symmetrical continuous rolling mill stands fixed on it, and the two continuous rolling mill stands are fixedly connected by multiple frame beams;
[0008] There are two support roller seats, which are respectively installed in the two continuous rolling mill stands. Both support roller seats are driven to move forward and backward by the initial film forming pressure regulating AGC fixed in the continuous rolling mill stand. Two support rollers arranged in an up-down position are rotatably installed between the two support roller seats.
[0009] The initial film-forming pressure roller is rotatably mounted between the two support roller seats and located behind the two support roller seats;
[0010] A film-forming stationary roller is rotatably mounted between the two continuous rolling mill stands and located behind the initial film-forming pressure roller;
[0011] A finishing roll, which is rotatably mounted between the two continuous rolling mill stands;
[0012] The film-reducing pressure roller is rotatably mounted between two adjustable roller seats and located between the film-forming fixed roller and the finishing fixed roller. The two adjustable roller seats are respectively set in the two continuous rolling mill stands, and both adjustable roller seats are driven to move up and down by the film-reducing pressure regulating AGC fixed in the continuous rolling mill stand.
[0013] The finishing pressure roll is rotatably mounted between two adjustable roll seats and located below the finishing stationary roll. The two adjustable roll seats are respectively set in the two continuous rolling mill stands, and both adjustable roll seats are driven to move up and down by the finishing pressure regulating AGC fixed in the continuous rolling mill stand.
[0014] The initial cutting mechanism is located below the film-forming roller and is capable of performing the first initial cutting of the film wrapped on the film-forming roller.
[0015] And a peeling and cutting mechanism, which is located behind the precision rolling fixed roll, and is capable of peeling and cutting the film after it has been precision rolled by the precision rolling fixed roll and the precision rolling pressure roll.
[0016] Furthermore, as a preferred embodiment, the initial film-forming pressure roller, the film-forming stationary roller, the film-reducing pressure roller, the finishing rolling stationary roller, and the finishing rolling pressure roller are all driven by servo motors via universal couplings.
[0017] Furthermore, as a preferred embodiment, the ends of the initial film-forming pressure roller, the film-forming stationary roller, the film-reducing pressure roller, the finishing rolling stationary roller, the finishing rolling pressure roller, and the two support rollers are all connected to the temperature control system via temperature-controlled rotary joints.
[0018] Furthermore, preferably, the initial cutting mechanism includes:
[0019] A fixed base, which is fixedly connected between the two continuous rolling mill stands;
[0020] There are two pressure roller seats, which are respectively fixed to the left and right ends of the fixed seat;
[0021] A cutting pressure roller is rotatably mounted between the two pressure roller seats, and the cutting pressure roller is located below the film-forming stationary roller;
[0022] There are two cylinder seats, which are fixed on the two pressure roller seats respectively, and a cylinder is fixedly installed on each cylinder seat;
[0023] There are two initial cutting knife holders, which are slidably mounted on the two pressure roller seats respectively. The moving end of the corresponding cylinder three can be rotatably connected to each initial cutting knife holder, and an initial cutting knife is installed on each initial cutting knife holder.
[0024] Furthermore, as a preferred embodiment, each of the initial cutting knife holders is provided with a sliding plate on its side wall, and each sliding plate is provided with at least two sliding grooves, and the sliding grooves are adapted to slide into contact with the guide pins fixed on the pressure roller seat.
[0025] Furthermore, preferably, the stripping and trimming mechanism includes:
[0026] There are two stripping roll seats, which are slidably mounted on two continuous rolling mill stands respectively. Each stripping roll seat is driven by a cylinder to move forward and backward.
[0027] A stripping roller, which is rotatably mounted between the two stripping roller seats;
[0028] There are two precision cutting blade holders, which are fixed to the left and right ends of the peeling roller seat respectively. Each precision cutting blade holder is equipped with a precision cutting blade, and each precision cutting blade is driven by a cylinder to adjust the cutting depth.
[0029] Furthermore, as a preferred embodiment, each set of support roller seats, adjustable roller seat one, adjustable roller seat two, pressure roller seat, and peeling roller seat is fixedly connected with a positioning crossbeam.
[0030] This utility model adopts the above technology and has the following beneficial effects compared with the existing technology:
[0031] 1. This new device adopts an integrated design of initial film formation, thinning, and fine rolling, and continuously rolls the film, reducing the number of equipment, alleviating the difficulty of debugging, and improving film formation efficiency.
[0032] 2. In this new device, the initial film formation uses four-roll rolling, and the film is formed using large and small working rolls. The film forming pressure roller is equipped with two support rollers to provide support force in two directions, control deformation, and improve the stability of film formation.
[0033] 3. In this new device, the film-reducing pressure roller can simultaneously control the roller gap at the first and second thinning points, simplifying the equipment structure.
[0034] 4. In this new device, the rotational speed difference between each working roller can be provided and the roller surface temperature can be controlled. The film formation stability is improved by reducing the thickness through the speed difference. The finishing roller and the finishing pressure roller provide the same speed to ensure the stability of the film output. The material properties remain unchanged when the material forms a film by controlling the roller surface temperature.
[0035] 5. This new device employs a combination of a preliminary cutting process and a fine cutting process. The preliminary cutting improves the tension stability of the diaphragm and prevents stress concentration, while the fine cutting ensures the edge dimensions and flatness of the diaphragm. Attached Figure Description
[0036] Figure 1 A schematic diagram of the three-dimensional structure of a continuous calendering machine for dry electrode fabrication. Figure 1 ;
[0037] Figure 2 A schematic diagram of the three-dimensional structure of a continuous calendering machine for dry electrode fabrication. Figure 2 ;
[0038] Figure 3A front view schematic diagram of a continuous calendering machine for dry electrode fabrication;
[0039] Figure 4 A top view schematic diagram of a continuous calendering machine for dry electrode fabrication;
[0040] Figure 5 A cross-sectional schematic diagram of a continuous calendering machine for dry electrode fabrication;
[0041] Figure 6 for Figure 5 An enlarged schematic diagram of part A in the middle;
[0042] Figure 7 for Figure 5 Enlarged schematic diagram of part B;
[0043] Figure 8 This is a schematic diagram of the working state of a continuous calendering machine for dry electrode fabrication.
[0044] In the diagram: 1. Initial film forming pressure regulating AGC; 2. Support roller; 3. Initial film forming pressure roller; 4. Film forming stationary roller; 5. Film reducing pressure roller; 6. Film reducing pressure regulating AGC; 7. Finishing rolling stationary roller; 8. Finishing rolling pressure roller; 9. Peeling roller; 11. Finishing cutter; 12. Finishing rolling pressure regulating AGC; 13. Continuous rolling mill stand; 14. Stand crossbeam; 15. Temperature control rotary joint; 16. Servo motor; 17. Universal coupling; 18. Base; 19. Positioning crossbeam; 20. Cylinder 1; 22. Cylinder 2; 23. Peeling roller seat; 24. Support roller seat; 101. Cutting pressure roller; 102. Guide pin; 103. Slide plate; 104. Initial cutting knife; 105. Initial cutting knife holder; 106. Cylinder 3; 107. Cylinder seat; 108. Fixed seat; 109. Pressure roller seat. Detailed Implementation
[0045] With reference to the accompanying drawings of the embodiments of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below.
[0046] Example: Please refer to the appendix Figure 1-8 This utility model provides a technical solution: a continuous calendering machine for dry electrode preparation, comprising:
[0047] The base 18 has two symmetrical continuous rolling mill stands 13 fixed on it, and the two continuous rolling mill stands 13 are fixedly connected by multiple stand beams 14.
[0048] There are two support roller seats 24, which are respectively installed in two continuous rolling mill stands 13. Both support roller seats 24 are driven to move forward and backward by the initial film forming pressure regulating AGC1 fixed in the continuous rolling mill stand 13. Two support rollers 2 are rotatably installed between the two support roller seats 24 and arranged in an upper and lower position.
[0049] The initial film forming pressure roller 3 is rotatably mounted between two support roller seats 24 and located behind the two support roller seats 24;
[0050] Film-forming stationary roller 4 is rotatably mounted between two continuous rolling mill stands 13 and located behind the initial film-forming pressure roller 3;
[0051] The finishing roll 7 is rotatably mounted between two continuous rolling mill stands 13;
[0052] The film-reducing pressure roller 5 is rotatably mounted between two adjustable roller seats and located between the film-forming fixed roller 4 and the finishing fixed roller 7. The two adjustable roller seats are respectively set in two continuous rolling mill stands 13, and both adjustable roller seats are driven to move up and down by the film-reducing pressure regulating AGC6 fixed in the continuous rolling mill stand 13.
[0053] Specifically, the film-reducing pressure roller 5 is set between the film-forming fixed roller 4 and the finishing fixed roller 7, which can simultaneously control the roller gap at the first and second thinning points.
[0054] The finishing pressure roll 8 is rotatably mounted between two adjustable roll seats 2 and located below the finishing fixed roll 7. The two adjustable roll seats 2 are respectively set in two continuous rolling mill stands 13, and both adjustable roll seats 2 are driven to move up and down by the finishing pressure regulating AGC 12 fixed in the continuous rolling mill stand 13.
[0055] The initial cutting mechanism is located below the film forming roller 4 and can perform the first initial cutting on the film wrapped on the film forming roller 4. The initial cutting improves the tension stability of the film and prevents stress concentration.
[0056] And a peeling and cutting mechanism, which is located behind the precision rolling fixed roll 7, and can peel and cut the film after it has been precision rolled by the precision rolling fixed roll 7 and the precision rolling pressure roll 8. The cutting can ensure the edge size and flatness of the film.
[0057] Specifically, the initial film formation uses four-roll rolling, with large and small work rolls for film formation. The film forming pressure roll is equipped with two support rolls to provide support in two directions, control deformation, and improve the stability of film formation.
[0058] In this embodiment, the initial film-forming pressure roller 3, the film-forming stationary roller 4, the film-reducing pressure roller 5, the finishing rolling stationary roller 7, and the finishing rolling pressure roller 8 are all driven by the servo motor 16 through the universal coupling 17.
[0059] In this embodiment, the ends of the initial film-forming pressure roller 3, the film-forming stationary roller 4, the film-reducing pressure roller 5, the finishing rolling stationary roller 7, the finishing rolling pressure roller 8, and the two support rollers 2 are all connected to the temperature control system through the temperature control rotary joint 15.
[0060] Specifically, the rotational speed difference between each working roll can be provided and the roll surface temperature can be controlled. The film formation stability is improved by reducing the thickness through the speed difference. The finishing roll and the finishing pressure roll provide the same speed to ensure the stability of the film output. The material properties remain unchanged when the material forms a film by controlling the roll surface temperature.
[0061] In this embodiment, the initial cutting mechanism includes:
[0062] The fixed base 108 is fixedly connected between two continuous rolling mill stands 13;
[0063] There are two pressure roller seats 109, which are fixed to the left and right ends of the fixed seat 108 respectively;
[0064] The cutting pressure roller 101 is rotatably mounted between two pressure roller seats 109, and the cutting pressure roller 101 is located below the film forming stationary roller 4;
[0065] There are two cylinder seats 107, which are fixed on two pressure roller seats 109 respectively, and each cylinder seat 107 is fixedly installed with a cylinder 106.
[0066] There are two primary cutting knife holders 105, which are slidably mounted on two pressure roller seats 109 respectively. Each primary cutting knife holder 105 can be rotatably connected to the moving end of its corresponding cylinder 3 106, and each primary cutting knife holder 105 is equipped with a primary cutting knife 104.
[0067] In this embodiment, each initial cutter holder 105 is provided with a slide plate 103 on its side wall. Each slide plate 103 is provided with at least two sliding grooves, and the sliding grooves are adapted to slide with the guide pins 102 fixed on the pressure roller seat 109.
[0068] In this embodiment, the stripping and trimming mechanism includes:
[0069] There are two stripping roll seats 23, which are slidably mounted on two continuous rolling mill stands 13 respectively. Each stripping roll seat 23 is driven by a cylinder 20 to move forward and backward.
[0070] The peeling roller 9 is rotatably mounted between two peeling roller seats 23;
[0071] There are two precision cutting blade holders, which are fixed on the left and right ends of the peeling roller seat 23 respectively. Each precision cutting blade holder is equipped with a precision cutting blade 11, and each precision cutting blade 11 is driven by cylinder 22 to adjust the cutting depth.
[0072] In this embodiment, each set of support roller seat 24, adjustable roller seat one, adjustable roller seat two, pressure roller seat 109, and peeling roller seat 23 is fixedly connected with a positioning crossbeam 19.
[0073] For specific implementation details, please refer to the appendix. Figure 8 The material is pressed and rolled by the primary film forming pressure roller 3 and the film forming stationary roller 4 to form a primary film. The film body undergoes the first film reduction process between the film forming stationary roller 4 and the film reduction pressure roller 5. Immediately afterwards, the film body undergoes the second film reduction process between the film reduction pressure roller 5 and the finishing rolling stationary roller 7. Then, the film body undergoes the finishing rolling process between the finishing rolling stationary roller 7 and the finishing rolling pressure roller 8. Finally, the film body is peeled off by the peeling roller 9 to facilitate the continued fine cutting process.
[0074] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A continuous calendering machine for dry electrode preparation, characterized in that, It includes: The base (18) has two symmetrical continuous rolling mill stands (13) fixed on it, and the two continuous rolling mill stands (13) are fixedly connected by multiple stand beams (14); There are two support roller seats (24), which are respectively installed in the two continuous rolling mill stands (13). Both support roller seats (24) are driven to move forward and backward by the initial film forming pressure regulating AGC (1) fixed in the continuous rolling mill stand (13). Two support rollers (2) arranged in an up-down manner are rotatably installed between the two support roller seats (24). The initial film forming pressure roller (3) is rotatably mounted between the two support roller seats (24) and located behind the two support roller seats (24); Film-forming stationary roller (4) is rotatably mounted between the two continuous rolling mill stands (13) and located behind the initial film-forming pressure roller (3); The finishing roll (7) is rotatably mounted between the two continuous rolling mill stands (13); The film-reducing pressure roller (5) is rotatably mounted between two adjustable roller seats and located between the film-forming fixed roller (4) and the finishing fixed roller (7). The two adjustable roller seats are respectively set in the two continuous rolling mill stands (13), and the two adjustable roller seats are driven to move up and down by the film-reducing pressure regulating AGC (6) fixed in the continuous rolling mill stand (13). The finishing pressure roll (8) is rotatably mounted between two adjustable roll seats and located below the finishing fixed roll (7). The two adjustable roll seats are respectively set in the two continuous rolling mill stands (13), and the two adjustable roll seats are driven to move up and down by the finishing pressure regulating AGC (12) fixed in the continuous rolling mill stand (13). The initial cutting mechanism is located below the film forming roller (4) and is capable of performing the first initial cutting of the film body wound on the film forming roller (4); And a stripping and cutting mechanism, which is located behind the precision rolling fixed roll (7) and can strip and cut the film after it has been precision rolled by the precision rolling fixed roll (7) and the precision rolling pressure roll (8).
2. The continuous calendering machine for dry electrode preparation according to claim 1, characterized in that: The initial film forming pressure roller (3), film forming stationary roller (4), film reducing pressure roller (5), finishing rolling stationary roller (7) and finishing rolling pressure roller (8) are all driven by servo motor (16) through universal coupling (17).
3. The continuous calendering machine for dry electrode preparation according to claim 2, characterized in that: The ends of the initial film-forming pressure roller (3), the film-forming stationary roller (4), the film-reducing pressure roller (5), the finishing rolling stationary roller (7), the finishing rolling pressure roller (8), and the two support rollers (2) are all connected to the temperature control system through a temperature-controlled rotary joint (15).
4. The continuous calendering machine for dry electrode preparation according to claim 3, characterized in that: The initial cutting mechanism includes: A fixed seat (108) is fixedly connected between the two continuous rolling mill stands (13); There are two pressure roller seats (109), which are respectively fixed on the left and right ends of the fixed seat (108); A cutting roller (101) is rotatably mounted between two roller seats (109), and the cutting roller (101) is located below the film forming roller (4); There are two cylinder seats (107), which are respectively fixed on the two pressure roller seats (109), and each cylinder seat (107) is fixedly installed with a cylinder three (106). There are two primary cutting knife holders (105), which are slidably mounted on the two pressure roller seats (109). The moving end of the corresponding cylinder three (106) can be rotatably connected to each primary cutting knife holder (105), and a primary cutting knife (104) is installed on each primary cutting knife holder (105).
5. The continuous calendering machine for dry electrode preparation according to claim 4, characterized in that: Each of the initial cutting knife holders (105) is provided with a sliding plate (103) on its side wall. Each of the sliding plates (103) is provided with at least two sliding grooves, and the sliding grooves are adapted to slide into the guide pins (102) fixed on the pressure roller seat (109).
6. The continuous calendering machine for dry electrode preparation according to claim 5, characterized in that: The stripping and trimming mechanism includes: There are two stripping roll seats (23), which are slidably mounted on two continuous rolling mill stands (13). Each stripping roll seat (23) is driven by a cylinder (20) to move forward and backward. A stripping roller (9) is rotatably mounted between the two stripping roller seats (23); And a precision cutting knife holder, which has two, and is fixed on the left and right ends of the peeling roller seat (23) respectively. Each precision cutting knife holder is equipped with a precision cutting knife (11), and each precision cutting knife (11) is driven by cylinder two (22) to adjust the cutting depth.
7. The continuous calendering machine for dry electrode preparation according to claim 6, characterized in that: Each set of support roller seat (24), adjustable roller seat one, adjustable roller seat two, pressure roller seat (109), and peeling roller seat (23) is fixedly connected to a positioning crossbeam (19).