A core assembly mechanism for automated lithium battery production

Abstract

This utility model discloses a core assembly mechanism for automated lithium battery production, including an extrusion table and an upper surface for extrusion work. Fixed back plates are respectively installed at the left and right ends of the middle of the platform. An extrusion pump is installed on one side of the fixed back plate. An extrusion rod is installed through the fixed back plate on the middle side of the extrusion pump. An extrusion plate is installed at the end of the extrusion rod. A pressure sensor is installed on one side of the extrusion plate. Side pressure pumps are respectively installed at the left and right ends of the upper rear side of the platform. This novel mechanism, by flipping the cell assembly on a turning table and coordinating with the secondary extrusion of the extrusion plate and side pressure plate, can apply pressure evenly to all surfaces of the cell assembly from all directions. For example, the four corners of the cell assembly may have thickness deviations during the first extrusion. After flipping and extruding, the thickness deviation can be controlled within a certain distance, significantly improving the flatness and consistency of the core, laying the foundation for subsequent cell assembly and battery performance stability.

Description

Technical Field

[0001] This utility model belongs to the technical field of electrode core assembly mechanism, specifically relating to an electrode core assembly mechanism for automated lithium battery production. Background Technology

[0002] The cell extrusion and shaping device is a key piece of equipment in the automated production of lithium battery electrode cores, used to extrude and shape the cells. Through the coordinated work of bottom, top, and side shaping mechanisms, and with the help of electric cylinders driving pressure blocks and other components, pressure is applied to all sides of the cell, ensuring consistent height of the electrode welding surfaces and regular cell size and shape. This avoids problems such as incomplete welding and explosions, improves cell consistency and battery module quality, and ensures stable battery performance.

[0003] Traditional electrode assembly mechanisms often use unidirectional or fixed-angle extrusion. The corners and sides of the battery cell are prone to insufficient or excessive deformation due to uneven stress, resulting in inconsistent electrode thickness and affecting the overall performance and safety of the lithium battery. Utility Model Content

[0004] The purpose of this utility model is to provide a core assembly mechanism for automated lithium battery production, in order to solve the problem that traditional core assembly mechanisms in the above-mentioned background technology mostly use unidirectional or fixed-angle extrusion, and the corners, sides and other parts of the cell assembly are prone to insufficient or excessive deformation due to uneven force, resulting in inconsistent core thickness and affecting the overall performance and safety of lithium batteries.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a core assembly mechanism for automated lithium battery production, comprising an extrusion table and a table surface on the upper part of the extrusion table for extrusion work;

[0006] Fixed back plates are respectively provided at the left and right ends of the middle of the platform. A squeeze pump is provided on one side of the fixed back plate. A squeeze rod is provided through the middle side of the squeeze pump and through the fixed back plate. A squeeze plate is provided at the end of the squeeze rod. A pressure sensor is provided on one side of the squeeze plate.

[0007] Side pressure pumps are respectively installed at the left and right ends of the upper rear side of the platform, a side pressure rod is installed in the middle of the side pressure pump, and a side pressure plate is installed at the front end of the side pressure rod.

[0008] The upper left end of the front side of the platform has a slot, a rotating motor is installed on the upper side of the slot, a drive shaft is installed in the middle right side of the rotating motor, a steering platform is installed on the right side of the drive shaft, a steering groove is installed at the connection between the steering platform and the middle front side of the platform, a loading surface is installed on the front side of the steering platform, and the extrusion platform is powered by an external power source.

[0009] Preferably, the two fixed back plates are connected to the tabletop by bolts, and the extrusion pump is connected to the fixed back plates by bolts.

[0010] Preferably, the extrusion plate is connected to the extrusion rod by a fixed connection, and the side pressure pump is connected to the table by bolts.

[0011] Preferably, the extrusion plate can be moved toward the center of the tabletop under the drive of the extrusion pump, and the side pressure plate can be moved toward the center of the tabletop under the drive of the side pressure pump.

[0012] Preferably, the rotating motor is connected by bolts and slots, and the steering platform is connected to the drive shaft by snap-fit ​​connection.

[0013] Preferably, the steering table is connected to the steering groove via a nested connection, and the 1 can rotate within the steering groove under the drive of a rotating motor.

[0014] Compared with the prior art, this utility model provides a core assembly mechanism for automated lithium battery production, which has the following advantages:

[0015] 1. Traditional electrode assembly mechanisms often employ unidirectional or fixed-angle extrusion. Uneven force on the corners and sides of the cell assembly can lead to insufficient or excessive deformation, resulting in inconsistent electrode thickness and affecting the overall performance and safety of the lithium battery. This new method, however, uses a rotating platform to flip the cell assembly, combined with secondary extrusion by extrusion plates and side pressure plates, to apply pressure evenly to all surfaces of the cell assembly. For example, the four corners of the cell assembly may have thickness deviations during the first extrusion; after flipping and extruding, these deviations can be controlled within a certain range, significantly improving the flatness and consistency of the electrode core. This lays the foundation for subsequent cell assembly and battery performance stability.

[0016] 2. In traditional techniques, when manually flipping the battery cell assembly for secondary extrusion, it is difficult to guarantee the accuracy of the flipping angle and the consistency of the placement position each time. This can easily cause the battery cell assembly to become misaligned during repeated extrusion, further affecting the shaping effect.

[0017] In this new design, the automated transmission structure of the rotating motor, drive shaft, and steering groove enables precise angle control of the steering platform, ensuring that the battery cell assembly can undergo secondary compression in the same posture after each rotation. Simultaneously, pressure sensors monitor the pressure in real time and provide feedback for adjustment, avoiding pressure fluctuations caused by manual operation and ensuring a completely standardized electrode core shaping process.

[0018] Furthermore, the coordinated operation of the turntable and the robotic arm forms a streamlined production line mode of "extrusion-flipping-re-extrusion-transfer". Through automated flipping and rapid transfer, this mechanism can shorten the time, improve production efficiency, and significantly increase the output per unit time. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of the extrusion device from the upper side view in this utility model.

[0020] Figure 2 In this utility model Figure 1 A schematic diagram of the center steering platform after it has turned.

[0021] Figure 3 This is a side view structural diagram of the extrusion device in this utility model.

[0022] Figure 4 In this utility model Figure 3 A schematic diagram of the structure of the center steering platform after it has turned.

[0023] In the diagram: 1. Platform; 2. Extrusion platform; 3. Extrusion pump; 4. Fixed back plate; 5. Extrusion rod; 6. Extrusion plate; 7. Pressure sensor; 8. Side pressure pump; 9. Side pressure rod; 10. Side pressure plate; 11. Slot; 12. Rotating motor; 13. Drive shaft; 14. Steering platform; 15. Steering groove; 16. Loading surface. Detailed Implementation

[0024] 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.

[0025] This utility model provides, for example Figure 1-4 The shown is a lithium battery automated production electrode core assembly mechanism, including an extrusion table 2 and a table surface 1 on the upper side of the extrusion table 2 for extrusion work.

[0026] A fixed back plate 4 is provided at the left and right ends of the middle of the table 1. A squeeze pump 3 is provided on one side of the fixed back plate 4. A squeeze rod 5 is provided through the middle side of the squeeze pump 3 and the fixed back plate 4. A squeeze plate 6 is provided at the end of the squeeze rod 5. A pressure sensor 7 is provided on one side of the squeeze plate 6.

[0027] Side pressure pumps 8 are respectively installed at the left and right ends of the upper rear side of the table 1. A side pressure rod 9 is installed in the middle of the side pressure pump 8. A side pressure plate 10 is installed at the front end of the side pressure rod 9. The extrusion table 2 is powered by connecting to an external power source.

[0028] In this embodiment, during the lithium battery core assembly and production process, the extrusion table 2 enters the working state after being connected to an external power source and started. The external robotic arm precisely places the battery cell assembly to be extruded and shaped onto the loading surface 16 of the turntable 14. At this time, the turntable 14 is in its initial position, with the loading surface 16 facing upwards to receive the battery cell assembly.

[0029] Subsequently, the extrusion pump 3 and the side pressure pump 8 begin operation. The extrusion pump 3 drives the extrusion rod 5, which moves the extrusion plate 6 towards the center of the platform 1, applying pressure from the vertical direction of the battery cell assembly. Simultaneously, the side pressure pump 8 drives the side pressure rod 9, which moves the side pressure plate 10 towards the center of the platform 1, applying pressure from the horizontal direction of the battery cell assembly. Under the synergistic action of the extrusion plate 6 and the side pressure plate 10, the battery cell assembly is subjected to comprehensive extrusion and shaping.

[0030] The pressure sensor 7 on one side of the extrusion plate 6 monitors the pressure value in real time during the extrusion process and feeds the data back to the control system. The operator can adjust the working intensity of the extrusion pump 3 and the side pressure pump 8 through the control system according to the preset pressure parameters to ensure that the battery cell assembly is shaped under appropriate pressure, avoiding damage to the battery cell due to excessive pressure or poor shaping effect due to insufficient pressure.

[0031] The extrusion table 2 operates on the principle of hydraulic transmission and pressure feedback control. The extrusion pump 3 and side pressure pump 8 serve as hydraulic power sources, driving the extrusion rod 5 and side pressure rod 9 in linear motion through pressure changes in the internal hydraulic oil. When the hydraulic pump output pressure increases, the extrusion rod 5 and side pressure rod 9 drive the extrusion plate 6 and side pressure plate 10 to move rapidly towards the battery cell assembly and apply pressure. When the pressure sensor 7 detects that the pressure has reached the set value, the control system adjusts the output pressure of the hydraulic pump to maintain a constant pressure on the extrusion plate 6 and side pressure plate 10, achieving stable extrusion. This hydraulic transmission method can provide a large extrusion force and stable pressure output, meeting the requirements for high-precision extrusion shaping of lithium battery cells.

[0032] like Figure 1-4As shown, a slot 11 is provided inside the upper left front end of the platform 1. A rotating motor 12 is installed on the upper side of the slot 11. A drive shaft 13 is located in the middle right side of the rotating motor 12. A steering platform 14 is located on the right side of the drive shaft 13. A steering groove 15 is provided at the connection between the steering platform 14 and the middle front side of the platform 1. A loading surface 16 is provided on the front side of the steering platform 14. Two fixed back plates 4 are connected to the platform 1 by bolts. The extrusion pump 3 is connected to the fixed back plates 4 by bolts. The extrusion plate 6 is fixedly connected to... The extrusion rod 5 is connected, the side pressure pump 8 is connected to the table 1 by bolts, the extrusion plate 6 can move towards the middle side of the table 1 under the drive of the extrusion pump 3, the side pressure plate 10 can move towards the middle side of the table 1 under the drive of the side pressure pump 8, the rotary motor 12 is connected to the slot 11 by bolts, the steering platform 14 is connected to the drive shaft 13 by snap-fit ​​connection, the steering platform 14 is connected to the steering groove 15 by nesting connection, and the steering platform 14 can rotate in the steering groove 15 under the drive of the rotary motor 12.

[0033] Optionally, the steering platform 14 is a three-quarter cylindrical shape.

[0034] Preferably, after the battery cell assembly completes its first extrusion and shaping, the rotary motor 12 is started, and its output shaft drives the drive shaft 13 to rotate. Since the steering table 14 is connected to the drive shaft 13 by a snap-fit ​​connection and is installed in the steering groove 15 by a nested connection, the rotation of the drive shaft 13 will drive the steering table 14 to rotate in the steering groove 15, thus flipping the battery cell assembly on the loading surface 16.

[0035] After being flipped over, the parts of the battery cell assembly that were not fully compressed are exposed. The robotic arm picks them up again and places them on the loading surface 16 after the turntable 14 is reset. At this time, the compression pump 3 and the side pressure pump 8 are restarted, and the compression plate 6 and the side pressure plate 10 perform a second compression on the battery cell assembly to ensure that all parts of the battery cell assembly achieve the ideal shaping effect.

[0036] After the secondary extrusion is completed, the rotary motor 12 drives the steering table 14 to rotate again, turning the loading surface 16 to a direction that is convenient for the robotic arm to grasp. The robotic arm quickly grabs the battery cell assembly from the loading surface 16 and transfers it to the subsequent assembly process. The whole process is highly efficient and automated.

[0037] The core principle of this novel innovative structure lies in achieving multi-angle extrusion and efficient circulation of the battery cell assembly through mechanical transmission and automated control. The rotating motor 12 serves as the power source, converting electrical energy into mechanical energy, which is then transmitted to the steering platform 14 via the transmission shaft 13. The nested connection between the steering platform 14 and the steering groove 15 ensures stability during rotation, preventing wobbling or displacement that could affect the positional accuracy of the battery cell assembly.

[0038] During the cell assembly flipping process, the secondary extrusion by the extrusion plate 6 and the side pressure plate 10 solves the problem of forming dead corners that exist in traditional unidirectional extrusion. For example, the corners of the cell assembly may not be properly shaped during the first extrusion due to uneven force. Through the secondary extrusion after flipping, these areas can be fully stressed, improving the overall flatness and consistency of the cell assembly. At the same time, the automated flipping and resetting of the turntable 14, closely coordinated with the gripping and transferring actions of the robotic arm, forms an assembly line-like operation mode, significantly shortening the dwell time of the cell assembly in the assembly process. Compared with traditional manual flipping or single-station extrusion methods, production efficiency is improved, production costs are effectively reduced, and the capacity and quality of automated lithium battery production are increased.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A core assembly mechanism for automated production of lithium batteries, comprising an extrusion table (2) and a table surface (1) on the upper side of the extrusion table (2) for extrusion work. The middle left and right ends of the tabletop (1) are respectively provided with fixed back plates (4), and a squeeze pump (3) is provided on one side of the fixed back plate (4). A squeeze rod (5) is provided through the fixed back plate (4) on the middle side of the squeeze pump (3). A squeeze plate (6) is provided at the end of the squeeze rod (5). A pressure sensor (7) is provided on one side of the squeeze plate (6). Side pressure pumps (8) are respectively provided on the left and right ends of the upper rear side of the platform (1), a side pressure rod (9) is provided in the middle of the side pressure pump (8), and a side pressure plate (10) is provided at the front end of the side pressure rod (9). characterized in that A slot (11) is provided inside the upper left front side of the platform (1). A rotating motor (12) is provided on the upper side of the slot (11). A transmission shaft (13) is provided in the middle right side of the rotating motor (12). A steering platform (14) is provided on the right side of the transmission shaft (13). A steering groove (15) is provided at the connection between the steering platform (14) and the middle front side of the platform (1). A loading surface (16) is provided on the front side of the steering platform (14). The extrusion table (2) is powered by connecting to an external power source.

2. The pole core assembling mechanism for automatic production of lithium batteries according to claim 1, characterized in that: The two fixed back plates (4) are connected to the tabletop (1) by bolts, and the extrusion pump (3) is connected to the fixed back plates (4) by bolts.

3. The pole core assembling mechanism for automatic production of lithium batteries according to claim 2, characterized in that: The extrusion plate (6) is connected to the extrusion rod (5) by a fixed connection, and the side pressure pump (8) is connected to the table (1) by a bolt connection.

4. The electrode core assembly mechanism for automated lithium battery production according to claim 3, characterized in that: The extrusion plate (6) can be moved toward the middle side of the table (1) under the drive of the extrusion pump (3), and the side pressure plate (10) can be moved toward the middle side of the table (1) under the drive of the side pressure pump (8).

5. The electrode core assembly mechanism for automated lithium battery production according to claim 4, characterized in that: The rotating motor (12) is connected by bolts and slots (11), and the steering table (14) is connected to the drive shaft (13) by snap-fit ​​connection.

6. The electrode core assembly mechanism for automated lithium battery production according to claim 5, characterized in that: The steering platform (14) is connected to the steering groove (15) by a nested connection, and the steering platform (14) can rotate in the steering groove (15) under the drive of the rotating motor (12).

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