Laminating device for multi-layer compounding of battery pole pieces

Abstract

The invention relates to the technical field of press-fit devices, and discloses a press-fit device for multi-layer compounding of battery pole pieces, the press-fit device comprises a rack, racks and a bearing plate, the bearing plate is arranged in an inner cavity of the rack, the racks are arranged on two sides of a bearing end of the rack, a guide frame is arranged at the top of the rack, and the rack is arranged on the guide frame. Driven rollers are uniformly and rotatably connected to an inner cavity of the guide frame, the driven rollers can support and guide battery pole pieces in a multi-point mode, wrinkles or deviation of the pole pieces in the conveying process is avoided, the conveying smoothness of the pole pieces is guaranteed, a driving rotating roller is arranged in the middle of the inner cavity of the guide frame, and the driving rotating roller provides stable driving force; and the driven roller is matched to realize constant-speed and continuous transmission of the battery pole piece. According to the pressing device for multilayer compounding of the battery pole pieces, the positioning stability is further improved through cooperation of the clamping arms and the clamping grooves. The pressure sensor can detect fitting pressure in real time, reliable feedback is provided for position fixing of the pressing mechanism, and stable operation and accurate positioning of the whole structure are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of lamination equipment technology, specifically to a lamination equipment for multilayer composite of battery electrodes. Background Technology

[0002] The pressing device for multi-layer composite battery electrode is a key piece of equipment in the battery manufacturing field. It is mainly used in the composite processing of multi-layer battery electrode. Its core function is to apply appropriate pressure to make the multi-layer electrode tightly bonded, laying the foundation for subsequent battery assembly and performance. It is widely applicable to the production process of various new energy batteries such as lithium-ion batteries and sodium-ion batteries.

[0003] While existing pressing devices are equipped with a power structure to drive the pressing components, this structure struggles to ensure uniform pressure application across the multilayer electrode surfaces during operation. This results in issues such as loose bonding and localized gaps after electrode lamination, affecting the lamination quality. Although the control structure can adjust pressing-related parameters, its precision is insufficient, leading to variations in pressing force between different batches or even within the same batch, resulting in poor consistency. Furthermore, the components in the guide structure used to adjust the electrode width often employ a unidirectional adjustment method or have an unreasonable structural design. This not only limits the adaptability range, making it difficult to meet the processing requirements of electrodes with different widths, but also suffers from insufficient guiding precision, easily causing electrode misalignment during transport and pressing. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a pressing device for multi-layer composite battery electrodes, which solves the technical problems in existing pressing devices, such as poor pressure uniformity leading to loose electrode bonding, insufficient control structure adjustment precision leading to poor pressing consistency, and limited adaptability of the guide structure and insufficient guide precision easily causing electrode conveying and pressing misalignment.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a pressing device for multi-layer composite battery electrode sheets, comprising: a frame, a rack, and a load-bearing plate. The load-bearing plate is disposed in the inner cavity of the frame, and the rack is disposed on both sides of the load-bearing end of the frame. A guide frame is disposed on the top of the frame. A driven roller is uniformly rotatably connected to the inner cavity of the guide frame. The driven roller can provide multi-point support and guidance for the battery electrode sheets, avoiding wrinkles or deviations during electrode sheet transmission and ensuring the flatness of electrode sheet transport. An active rotating roller is disposed in the middle of the inner cavity of the guide frame. The active rotating roller is provided with a stable driving force by a geared motor disposed outside it, which, together with the driven roller, realizes uniform and continuous transmission of the battery electrode sheets, laying a stable transport foundation for subsequent pressing operations. A pressing mechanism is slidably disposed on the top of the frame. The pressing mechanism includes a movable frame that is slidably connected to the machine frame. A cylinder is installed on the top of the movable frame. A control module is installed at the control end of the cylinder. The control module can precisely adjust the extension stroke and pressure of the cylinder to achieve fine control of the pressing force. A pressing plate is connected to the output end of the cylinder. The pressing plate is vertically raised and lowered under the drive of the cylinder to apply uniform pressure to the battery electrode sheet below, thereby completing the composite pressing of multiple electrode sheets. The inner cavity of the pressing mechanism is equipped with a guide mechanism and a moving mechanism. The guiding mechanism includes a bidirectional lead screw, with nuts threaded to both outer sides of the bidirectional lead screw. An assembly arm is connected to the bottom of the nut, and a roller assembly is connected between the two assembly arms. The bidirectional lead screw is powered by a drive motor located at the top of the housing cavity. When rotating, it can drive the nuts on both sides to move synchronously in opposite directions. In turn, the horizontal position of the roller assembly can be adjusted by the assembly arms, so that the roller assembly can be adapted to battery electrode sheets of different widths, ensuring the guiding accuracy during electrode sheet transmission. The moving mechanism includes a horizontal shaft disposed inside the pressing mechanism, and a servo motor is disposed inside the pressing mechanism. The output end of the servo motor is connected to a first gear, and a second gear is connected to both sides of the horizontal shaft. The second gear meshes with the first gear. The servo motor provides stable power to the horizontal shaft through the meshing of the first and second gears, ensuring transmission efficiency and motion accuracy. An electric lifting arm is sleeved on the outside of the horizontal shaft, and a clamping arm is connected to the output end of the electric lifting arm. A groove adapted to the clamping arm is opened on the top of the load-bearing plate. The precise fit between the groove and the clamping arm can realize the rapid positioning of the pressing mechanism and ensure the accuracy of the pressing position. A pressure sensor is connected to the outside of the clamping arm. The pressure sensor can detect the contact pressure between the clamping arm and the groove in real time, providing feedback signals for the reliability of the fixed position.

[0006] Preferably, the guide frame is connected to support legs on both outer sides. The support legs are connected to the rack by bolts. The bolt connection method facilitates the disassembly and maintenance of the support legs, while ensuring the stability of the connection between the guide frame and the rack, and preventing the guide frame from shaking during operation.

[0007] Preferably, the rack meshes with the second gear, and the meshing of the rack and the second gear converts the rotational motion of the servo motor into the linear movement of the pressing mechanism, thereby achieving smooth movement of the pressing mechanism on the top of the frame. The top of the frame is provided with a track groove, and the inner cavity of the track groove is slidably connected to the moving frame. The track groove provides guiding constraints for the moving frame, reduces the offset during the movement, and ensures the linearity and stability of the pressing mechanism's movement.

[0008] Preferably, the pressure sensor is connected to the control module via a circuit. The pressure signal detected by the pressure sensor can be transmitted to the control module in real time, providing a basis for the control module to adjust the working state of the cylinder and realize automated control. Furthermore, the pressure sensor is provided with a protective shell, which can effectively prevent dust, debris and other impurities from corroding the pressure sensor, extend its service life and ensure detection accuracy.

[0009] Preferably, the cylinder is externally connected to a limit arm via bolts. The bolt connection facilitates the disassembly and assembly of the cylinder and the limit arm, ensuring a firm connection. The limit arm is connected to the movable frame via a fixed frame. The fixed frame enhances the stability of the limit arm installation, prevents displacement of the limit arm during operation, and ensures the accuracy of the pressing plate lifting.

[0010] Preferably, the inner cavity of the movable frame is fitted with a bearing, and the bearing is located outside the horizontal shaft. The bearing can reduce the frictional resistance between the horizontal shaft and the movable frame when the horizontal shaft rotates, reduce energy loss, and at the same time ensure the flexibility and smoothness of the horizontal shaft rotation.

[0011] Preferably, the top of the movable frame is provided with a housing, which is located outside the bidirectional lead screw. The housing can protect the bidirectional lead screw, drive motor and other components, avoid interference from external impurities, and also serve as a dustproof and moisture-proof function. A bearing is connected between the bidirectional lead screw and the housing. The bearing reduces friction when the bidirectional lead screw rotates, ensuring the smoothness of the adjustment process. Furthermore, a drive motor is provided at the top of the inner cavity of the housing. The output end of the drive motor is connected to the bidirectional lead screw, and the drive motor provides power to the bidirectional lead screw, realizing the automatic adjustment of the position of the roller assembly, improving the adaptability and ease of operation of the device.

[0012] Preferably, a geared motor is provided outside the active roller. The geared motor is located outside the guide frame. The geared motor can precisely adjust the rotation speed of the active roller to ensure that the battery electrode transfer speed matches the pressing operation rhythm and avoid the electrode transfer being too fast or too slow, which would affect the pressing effect.

[0013] Preferably, the bottom of the pressing plate is uniformly provided with pressing arms. The uniformly distributed pressing arms can transmit pressure evenly to the surface of the battery electrode, avoiding excessive local pressure that could damage the electrode, or insufficient local pressure that could affect the bonding effect. The output end of the pressing arm is provided with a rubber pad. The rubber pad has a certain elasticity, which can buffer the impact force during the pressing process, protect the surface of the electrode from scratches, and enhance the fit during pressing.

[0014] Preferably, the bottom of the frame is provided with foot pads, which can increase the friction between the frame and the ground, improve the overall stability of the device, and at the same time play a shock absorption role, reducing the transmission of vibration during operation. Furthermore, the frame is provided with reinforcing ribs on the outside, which can enhance the structural strength and load-bearing capacity of the frame, prevent the frame from deforming under long-term stress, and extend the service life of the device.

[0015] Compared with the prior art, the present invention provides a pressing device for multilayer composite of battery electrodes, which has the following advantages: This multi-layer battery electrode lamination pressing device uses a pressing mechanism driven by a limiting arm to raise and lower the pressing plate, applying uniform pressure to the multi-layer battery electrodes for excellent lamination results. The control module allows for precise control of the limiting arm's stroke and pressure, improving the controllability and consistency of the pressing force. A bidirectional lead screw in the guiding mechanism moves the nut and assembly arm, adjusting the position of the rotating roller assembly to accommodate electrodes of different widths, enhancing the device's versatility and guiding accuracy. The moving mechanism, through the cooperation of a servo motor, gear transmission, and an electric lifting arm, enables rapid movement and precise positioning of the pressing mechanism. The cooperation between the clamping arm and the clamping slot further improves positioning stability. A pressure sensor detects the bonding pressure in real time, providing reliable feedback for fixing the pressing mechanism's position, ensuring stable operation and accurate positioning of the overall structure. Attached Figure Description

[0016] Figure 1 This is a front view of the present invention; Figure 2 This is a planar schematic diagram of the present invention; Figure 3 This is a schematic diagram of the external pressing mechanism of the present invention; Figure 4 This is a partial schematic diagram of the pressing mechanism of the present invention; Figure 5 This is an external schematic diagram of the moving mechanism of the present invention.

[0017] In the diagram: 1. Frame; 11. Rack; 12. Load-bearing plate; 2. Guide frame; 21. Driven roller; 22. Driven roller; 23. Support leg; 3. Pressing mechanism; 31. Moving frame; 32. Housing; 33. Limiting arm; 34. Cylinder; 35. Control module; 36. Pressing plate; 37. Pressing arm; 4. Guide mechanism; 41. Bidirectional lead screw; 42. Nut; 43. Drive motor; 44. Assembly arm; 45. Roller assembly; 5. Moving mechanism; 51. Horizontal shaft; 52. Electric lifting arm; 53. Clamping arm; 54. Pressure sensor; 55. Servo motor; 56. First gear; 57. Second gear. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] This invention provides a technical solution; please refer to [link / reference]. Figure 1 and Figure 2 A pressing device for multi-layer composite battery electrode sheets includes: a frame 1, a rack 11, and a load-bearing plate 12. The load-bearing plate 12 is disposed in the inner cavity of the frame 1, and the rack 11 is disposed on both sides of the load-bearing end of the frame 1. A guide frame 2 is disposed on the top of the frame 1. A driven roller 21 is uniformly rotatably connected to the inner cavity of the guide frame 2. The driven roller 21 can provide multi-point support and guidance for the battery electrode sheets to avoid wrinkles or deviations during the transmission of the electrode sheets and ensure the flatness of the electrode sheet transmission. An active rotating roller 22 is disposed in the middle of the inner cavity of the guide frame 2. The active rotating roller 22 provides a stable driving force and works with the driven roller 21 to achieve uniform and continuous transmission of the battery electrode sheets, laying a stable transmission foundation for subsequent pressing operations. A pressing mechanism 3 is slidably disposed on the top of the frame 1. Please see Figure 3 and Figure 4 The pressing mechanism 3 includes a movable frame 31, which is slidably connected to the frame 1. A cylinder 34 is provided on the top of the movable frame 31. A control module 35 is provided at the control end of the cylinder 34. The control module 35 can precisely adjust the extension stroke and pressure of the cylinder 34 to achieve fine control of the pressing force. A pressing plate 36 is connected to the output end of the cylinder 34. The pressing plate 36 is driven by the cylinder 34 to achieve vertical lifting and lowering, applying uniform pressure to the battery electrode below to complete the composite pressing of multiple electrode sheets. The inner cavity of the pressing mechanism 3 is provided with a guide mechanism 4 and a moving mechanism 5. The guiding mechanism 4 includes a bidirectional lead screw 41, with nuts 42 threadedly connected to both outer sides of the bidirectional lead screw 41. An assembly arm 44 is connected to the bottom of the nut 42, and a roller assembly 45 is connected between the two assembly arms 44. When the bidirectional lead screw 41 rotates, it can drive the nuts 42 on both sides to move synchronously in opposite directions. In turn, the horizontal position of the roller assembly 45 can be adjusted by the assembly arms 44, so that the roller assembly 45 can be adapted to battery electrode sheets of different widths and specifications, ensuring the guiding accuracy during the electrode sheet transmission process. Please see Figure 4 and Figure 5The moving mechanism 5 includes a horizontal shaft 51, which is located inside the pressing mechanism 3. A servo motor 55 is installed inside the pressing mechanism 3. The output end of the servo motor 55 is connected to a first gear 56. A second gear 57 is connected to both sides of the horizontal shaft 51. The second gear 57 meshes with the first gear 56. The servo motor 55 provides stable power to the horizontal shaft 51 through the meshing of the first gear 56 and the second gear 57, ensuring transmission efficiency and motion accuracy. An electric lifting arm 52 is sleeved on the outside of the horizontal shaft 51. A clamping arm 53 is connected to the output end of the electric lifting arm 52. A slot adapted to the clamping arm 53 is opened on the top of the load-bearing plate 12. The precise cooperation between the slot and the clamping arm 53 can realize the rapid positioning of the pressing mechanism 3 and ensure the accuracy of the pressing position. A pressure sensor 54 is connected to the outside of the clamping arm 53. The pressure sensor 54 can detect the contact pressure between the clamping arm 53 and the slot in real time, providing feedback signals for the reliability of the fixed position.

[0020] Both sides of the guide frame 2 are connected to support legs 23. The support legs 23 are connected to the rack 11 by bolts. The bolt connection method facilitates the disassembly and maintenance of the support legs 23, while ensuring the stability of the connection between the guide frame 2 and the rack 11, and preventing the guide frame 2 from shaking during operation.

[0021] The rack 11 meshes with the second gear 57. The meshing of the rack 11 and the second gear 57 converts the rotational motion of the servo motor 55 into the linear movement of the pressing mechanism 3, so as to realize the smooth movement of the pressing mechanism 3 on the top of the frame 1. The top of the frame 1 is provided with a track groove. The inner cavity of the track groove is slidably connected to the moving frame 31. The track groove provides guidance and constraint for the moving frame 31, reduces the offset during the movement, and ensures the linearity and stability of the movement of the pressing mechanism 3.

[0022] The pressure sensor 54 is connected to the control module 35 via a circuit. The pressure signal detected by the pressure sensor 54 can be transmitted to the control module 35 in real time, providing a basis for the control module 35 to regulate the working state of the cylinder 34 and realize automated control. The pressure sensor 54 is equipped with a protective shell, which can effectively prevent dust, debris and other impurities from corroding the pressure sensor 54, extend its service life and ensure detection accuracy.

[0023] The cylinder 34 is externally connected to the limit arm 33 by bolts. The bolt connection facilitates the disassembly and assembly of the cylinder 34 and the limit arm 33, ensuring the connection is firm. The limit arm 33 is connected to the movable frame 31 through a fixed frame. The fixed frame can enhance the stability of the installation of the limit arm 33, prevent the limit arm 33 from shifting during operation, and ensure the accuracy of the lifting and lowering of the pressing plate 36.

[0024] The inner cavity of the movable frame 31 is fitted with a bearing, and the bearing is located outside the horizontal shaft 51. The bearing can reduce the frictional resistance between the horizontal shaft 51 and the movable frame 31 when the horizontal shaft 51 rotates, reduce energy loss, and at the same time ensure the flexibility and smoothness of the horizontal shaft 51 rotation.

[0025] The top of the movable frame 31 is provided with a housing 32, which is located outside the bidirectional lead screw 41. The housing 32 can protect the bidirectional lead screw 41, drive motor 43 and other components, avoid interference from external impurities, and also serve as a dustproof and moisture-proof function. A bearing is connected between the bidirectional lead screw 41 and the housing 32. The bearing reduces the friction when the bidirectional lead screw 41 rotates, ensuring the smoothness of the adjustment process. The drive motor 43 is located at the top of the inner cavity of the housing 32. The output end of the drive motor 43 is connected to the bidirectional lead screw 41. The drive motor 43 provides power to the bidirectional lead screw 41, realizing the automatic adjustment of the position of the roller assembly 45, improving the adaptability and ease of operation of the device.

[0026] A geared motor is installed on the outside of the active roller 22. The geared motor is located outside the guide frame 2. The geared motor can precisely adjust the rotation speed of the active roller 22 to ensure that the battery electrode transfer speed matches the pressing operation rhythm and avoid the electrode transfer being too fast or too slow, which would affect the pressing effect.

[0027] The bottom of the pressing plate 36 is uniformly provided with pressing arms 37. The evenly distributed pressing arms 37 can evenly transmit pressure to the surface of the battery electrode, avoiding excessive local pressure that could damage the electrode, or insufficient local pressure that could affect the bonding effect. The output end of the pressing arm 37 is provided with a rubber pad. The rubber pad has a certain elasticity, which can buffer the impact force during the pressing process, protect the surface of the electrode from scratches, and enhance the adhesion during pressing.

[0028] The bottom of the frame 1 is equipped with foot pads, which can increase the friction between the frame 1 and the ground, improve the overall stability of the device, and also play a role in shock absorption, reducing the transmission of vibration during operation. In addition, the frame 1 is equipped with reinforcing ribs on the outside, which can enhance the structural strength and load-bearing capacity of the frame 1, prevent the frame 1 from deforming under long-term stress, and extend the service life of the device.

[0029] This scheme first places the battery electrode sheet outside the driven roller 21 and the driving roller 22, then passes it through the roller assembly 45. The driving roller 22 is driven to rotate by a geared motor outside the driving roller 22 to realize the transfer of the battery electrode sheet. When the battery electrode sheet moves to the bottom of the pressing plate 36, the control module 35 starts the cylinder 34, which drives the pressing plate 36 to descend. The pressing arm 37 at the bottom of the pressing plate 36 performs the pressing operation on the battery electrode sheet. If the pressing position needs to be adjusted, the servo motor 55 can be started. The servo motor 55 drives the first gear 56 drives the second gear 57 to rotate, and the meshing of the second gear 57 with the rack 11 drives the pressing mechanism 3 to move smoothly along the track groove at the top of the frame 1. When the pressing mechanism 3 moves to the designated position, the electric lifting arm 52 is activated to drive the clamping arm 53 to insert into the clamping groove at the top of the load-bearing plate 12, thereby fixing the position of the pressing mechanism 3. At the same time, the pressure sensor 54 outside the clamping arm 53 detects the bonding pressure signal and transmits it to the control module 35. The control module 35 adjusts the working state of the cylinder 34 according to the pressure feedback to ensure the pressing accuracy.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pressing device for multilayer composite of battery electrodes, comprising: The frame (1), rack (11) and load-bearing plate (12) are provided in the inner cavity of the frame (1) and the rack (11) is provided on both sides of the load-bearing end of the frame (1). The frame (1) is characterized in that: a guide frame (2) is provided at the top of the frame (1), a driven roller (21) is uniformly rotatably connected to the inner cavity of the guide frame (2), an active rotating roller (22) is provided in the middle of the inner cavity of the guide frame (2), and a pressing mechanism (3) is slidably provided at the top of the frame (1). The pressing mechanism (3) includes a movable frame (31), which is slidably connected to the frame (1), and a cylinder (34) is provided on the top of the movable frame (31). A control module (35) is provided at the control end of the cylinder (34), and a pressing plate (36) is connected to the output end of the cylinder (34). A guide mechanism (4) and a moving mechanism (5) are provided in the inner cavity of the pressing mechanism (3). The guide mechanism (4) includes a bidirectional lead screw (41), and nuts (42) are threaded to both sides of the bidirectional lead screw (41). An assembly arm (44) is connected to the bottom of the nut (42), and a roller assembly (45) is connected between the two assembly arms (44). The moving mechanism (5) includes a horizontal shaft (51), which is located inside the pressing mechanism (3). The inner cavity of the pressing mechanism (3) is equipped with a servo motor (55). The output end of the servo motor (55) is connected to a first gear (56). Both sides of the horizontal shaft (51) are connected to a second gear (57). The second gear (57) meshes with the first gear (56). An electric lifting arm (52) is sleeved on the outside of the horizontal shaft (51). The output end of the electric lifting arm (52) is connected to a clamping arm (53). The top of the load-bearing plate (12) is provided with a slot that matches the clamping arm (53). A pressure sensor (54) is connected to the outside of the clamping arm (53).

2. The pressing device for multilayer composite battery electrode sheets according to claim 1, characterized in that: Both sides of the guide frame (2) are connected to support legs (23), and the support legs (23) are connected to the rack (11) by bolts.

3. The pressing device for multilayer composite battery electrode sheets according to claim 1, characterized in that: The rack (11) meshes with the second gear (57), and the top of the frame (1) is provided with a track groove, the inner cavity of the track groove is slidably connected to the moving frame (31).

4. The pressing device for multilayer composite battery electrode sheets according to claim 1, characterized in that: The pressure sensor (54) is connected to the control module (35) via a circuit, and the pressure sensor (54) is provided with a protective shell.

5. The pressing device for multilayer composite battery electrode sheets according to claim 1, characterized in that: The cylinder (34) is externally connected to a limiting arm (33) by bolts, and the limiting arm (33) is connected to the movable frame (31) by a fixed frame.

6. The pressing device for multilayer composite battery electrode sheets according to claim 1, characterized in that: The inner cavity of the movable frame (31) is fitted with a bearing, and the bearing is located outside the horizontal shaft (51).

7. The pressing device for multilayer composite battery electrode sheets according to claim 1, characterized in that: The top of the movable frame (31) is provided with a housing (32), which is located outside the bidirectional lead screw (41). A bearing is connected between the bidirectional lead screw (41) and the housing (32), and a drive motor (43) is provided at the top of the inner cavity of the housing (32). The output end of the drive motor (43) is connected to the bidirectional lead screw (41).

8. The pressing device for multilayer composite battery electrode sheets according to claim 1, characterized in that: The active roller (22) is equipped with a speed reduction motor, which is located outside the guide frame (2).

9. The pressing device for multilayer composite battery electrode sheet according to claim 1, characterized in that: The bottom of the pressing plate (36) is uniformly provided with pressing arms (37), and the output end of the pressing arm (37) is provided with a rubber pad.

10. A pressing device for multilayer composite battery electrode sheets according to claim 1, characterized in that: The bottom of the frame (1) is provided with foot pads, and the outside of the frame (1) is provided with reinforcing ribs.

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