Battery cell diaphragm unwinding device

Abstract

The utility model discloses a battery cell diaphragm unwinding device, and relates to the technical field of battery manufacturing. The cell diaphragm unwinding device comprises a deviation rectifying substrate and a diaphragm unwinding substrate which are perpendicular to each other, a deviation rectifying mechanism is arranged on the deviation rectifying base plate, is connected with the film placing base plate and is used for driving the film placing base plate to move in the horizontal direction; an air expansion shaft, an upper roller assembly, a diaphragm swing roller mechanism, a middle roller assembly and a lower roller assembly are arranged on the diaphragm releasing base plate, the diaphragm swing roller mechanism is located beside the upper roller assembly and comprises a tension rotating shaft, a swing seat and a swing roller assembly, one end of the tension rotating shaft penetrates through the diaphragm releasing base plate and is rotationally connected with the diaphragm releasing base plate, and the other end of the tension rotating shaft is rotationally connected with the middle roller assembly. The penetrating-out end of the tension rotating shaft is connected with a swing driving piece and a rotary encoder, the swing seat is installed on the tension rotating shaft, and the swing roller assembly is arranged on the swing seat. The cell diaphragm unreeling device can automatically adjust the tension of the diaphragm.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing equipment, in particular to a battery core diaphragm unwinding device. Background Art

[0002] The cell separator is a key component in lithium-ion batteries. Installed between the cathode and anode, it primarily prevents direct contact between the positive and negative electrodes, which could cause a short circuit, and promotes ion conduction in the electrolyte. During lithium-ion battery production, the separator coil must be unwound to ensure a smooth and continuous supply to the battery manufacturing equipment. In existing technologies, variations in the separator coil's diameter during unwinding can cause fluctuations in the separator's tension. Furthermore, deviations in the precision of the guide roller assembly and other components can affect the stability of the separator's tension. These variations in separator tension can affect separator quality: excessive separator tension stretches the membrane, enlarging its pores. Excessive separator tension can lead to deviation and wrinkling. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a battery core diaphragm unwinding device, which can automatically adjust the tension of the diaphragm.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A battery cell diaphragm unwinding device comprises a deflection correction substrate and a film-laying substrate which are perpendicular to each other; a deflection correction mechanism is provided on the deflection correction substrate, which is connected to the film-laying substrate and is used to drive the film-laying substrate to move in the horizontal direction; an air shaft, an upper roller assembly, a diaphragm swing roller mechanism, a middle roller assembly and a lower roller assembly are provided on the film-laying substrate, the diaphragm swing roller mechanism is located beside the upper roller assembly, the diaphragm swing roller mechanism comprises a tension rotating shaft, a swing seat and a swing roller assembly, one end of the tension rotating shaft passes through the film-laying substrate and is rotatably connected to the film-laying substrate, the outgoing end of the tension rotating shaft is connected to a swing driving member and a rotary encoder, the swing seat is installed on the tension rotating shaft, and the swing roller assembly is arranged on the swing seat.

[0006] In some embodiments, the swing drive member includes a cylinder and a connecting block, the cylinder is hinged to the back of the film substrate, and the output rod of the cylinder is hinged to the connecting block, and the connecting block is fixedly connected to the outlet end of the tension rotating shaft.

[0007] In some embodiments, the correction mechanism includes a ball screw pair, a first motor and a sliding shaft. The ball screw pair is horizontally arranged on the correction substrate. The output shaft of the first motor is connected to the screw of the ball screw pair. The sliding shaft is slidably arranged on the correction substrate, and one end of the sliding shaft is fixedly connected to the nut of the ball screw pair, and the other end is fixedly connected to the film-placing substrate.

[0008] In at least one embodiment, a linear guide rail parallel to the ball screw pair is installed on the correction substrate, a sliding seat is installed on the slider of the linear guide rail, and the sliding seat is fixedly connected to the film placing substrate.

[0009] Compared with the prior art, the present invention achieves at least the following beneficial effects:

[0010] When the battery cell diaphragm unwinding device is working, the diaphragm coil is unwound by the air shaft, and the diaphragm passes through the upper roller assembly, the diaphragm swing roller mechanism, the middle roller assembly and the lower roller assembly in sequence. During the movement and supply of the diaphragm, the tension of the diaphragm can be detected by setting a tension sensor on the unwinding device. According to the tension, the diaphragm swing roller mechanism is driven by the swinging drive to swing to adjust the tension of the diaphragm. The rotary encoder detects parameters such as the angle, speed and direction of rotation of the tension rotating shaft and transmits them to the controller of the swinging drive. The controller controls the working state of the swinging drive to adjust the specific swing angle of the swing roller assembly, thereby accurately adjusting the tension of the diaphragm. During the unwinding process of the diaphragm coil, once the position of the diaphragm is offset, the position of the film substrate can be adjusted by the correction mechanism to ensure that the diaphragm maintains an accurate position during the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] One or more embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings, in which:

[0012] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0013] Figure 2 A structural diagram of another perspective of an embodiment of the present utility model;

[0014] Figure 3 This is a structural diagram of the diaphragm swing roller mechanism according to an embodiment of the present utility model;

[0015] Figure 4 This is a schematic structural diagram of the correction mechanism of an embodiment of the present utility model.

[0016] The numbers in the figure are: 1. Correction substrate; 2. Film placing substrate; 21. Film guide plate; 3. Correction mechanism; 31. Ball screw pair; 32. First motor; 33. Sliding shaft; 4. Inflatable shaft; 5. Upper roller assembly; 6. Diaphragm swing roller mechanism; 61. Tension rotating shaft; 62. Swing seat; 63. Swing roller assembly; 7. Middle roller assembly; 8. Lower roller assembly; 9. Swing drive component; 91. Cylinder; 92. Connecting block; 10. Rotary encoder; 20. Linear guide rail; 30. Sliding seat; 40. Ion wind rod; 50. Deionization air duct; 60. Reducer; 70. Second motor; 80. Synchronous belt drive assembly; 801. Second synchronous wheel; 802. Synchronous belt. DETAILED DESCRIPTION

[0017] The present invention will be described in detail below with reference to the exemplary embodiments in the accompanying drawings. However, it should be understood that the present invention can be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. These embodiments are provided herein to make the disclosure of the present application more complete and to fully convey the concepts of the present application to those skilled in the art.

[0018] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting this application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "several" and "multiple" mean two or more, unless otherwise clearly and specifically defined. In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; or internal communication between two components. A person skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances. In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them. Furthermore, "above," "above," and "above" a first feature may include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher level than the second feature. "Below," "below," and "below" a first feature may include the first feature being directly below or diagonally below the second feature, or simply indicate that the first feature is at a lower level than the second feature.

[0019] like Figures 1 to 4As shown, a battery cell diaphragm unwinding device provided in an embodiment of the present invention includes a correction substrate 1 and a film-laying substrate 2 which are perpendicular to each other; a correction mechanism 3 is provided on the correction substrate 1, and the correction mechanism 3 is connected to the film-laying substrate 2, and the correction mechanism 3 is used to drive the film-laying substrate 2 to move in the horizontal direction, thereby correcting the film-laying substrate 2; an air shaft 4, an upper roller assembly 5, a diaphragm swing roller mechanism 6, a middle roller assembly 7 and a lower roller assembly 8 are provided on the film-laying substrate 2, the diaphragm swing roller mechanism 6 is located beside the upper roller assembly 5, the diaphragm swing roller mechanism 6 includes a tension rotating shaft 61, a swing seat 62 and a swing roller assembly 63, one end of the tension rotating shaft 61 passes through the film-laying substrate 2 and is rotatably connected to the film-laying substrate 2, the outgoing end of the tension rotating shaft 61 is connected to a swing driving member 9 and a rotary encoder 10, the swing seat 62 is installed on the tension rotating shaft 61, and the swing roller assembly 63 is arranged on the swing seat 62.

[0020] It should be noted that the unwinding device monitors the position of the diaphragm in real time by setting up a sensing system. Once the position of the diaphragm is offset, the position of the film substrate 2 can be adjusted by the correction mechanism 3 to ensure that the diaphragm maintains an accurate position during the lamination production process; the pneumatic shaft 4 is used to place the diaphragm coil, and the diaphragm coil is unwound on the pneumatic shaft 4 and passes through the upper roller assembly 5, the diaphragm swing roller mechanism 6, the middle roller assembly 7 and the lower roller assembly 8 in sequence. The swing drive 9 is used to drive the tension rotating shaft 61 to rotate on the film substrate 2, thereby driving the swing seat 62 and the swing roller assembly 63 to swing. The swing of the swing roller assembly 63 can adjust the tension of the diaphragm, and the rotary encoder 10 detects the parameters such as the rotation angle, speed and direction of the tension rotating shaft 61, and transmits the data to the controller of the swing drive 9, so that the controller can accurately control the operating state of the swing drive 9, thereby accurately adjusting the tension of the diaphragm during unwinding through the diaphragm swing roller mechanism 6.

[0021] Furthermore, the swing driving member 9 includes a cylinder 91 and a connecting block 92. The cylinder 91 is hinged to the back of the film substrate 2, and the output rod of the cylinder 91 is hinged to the connecting block 92. The connecting block 92 is fixedly connected to the protruding end of the tension rotating shaft 61.

[0022] The correcting mechanism 3 includes a ball screw pair 31, a first motor 32 and a sliding shaft 33. The ball screw pair 31 is horizontally arranged on the correcting substrate 1. The output shaft of the first motor 32 is connected to the screw of the ball screw pair 31. The sliding shaft 33 is slidably arranged on the correcting substrate 1. Specifically, the sliding shaft 33 is slidably connected to the correcting substrate 1 through a linear bearing, and one end of the sliding shaft 33 is fixedly connected to the nut of the ball screw pair 31, and the other end is fixedly connected to the film placing substrate 2.

[0023] Furthermore, a linear guide rail 20 parallel to the ball screw pair 31 is mounted on the correction base plate 1. A sliding seat 30 is mounted on the slider of the linear guide rail 20, and the sliding seat 30 is fixedly connected to the film-laying base plate 2. The linear guide rail 20 ensures that the film-laying base plate 2 moves smoothly in the horizontal direction during correction.

[0024] Furthermore, one end of the inflatable shaft passes through the film-laying substrate 2 and is rotationally connected to the film-laying substrate 2. The outlet end of the inflatable shaft is connected to an unwinding drive, which includes a reducer 60, a second motor 70, and a synchronous belt transmission assembly 80. The reducer 60 is mounted on the back of the film-laying substrate 2. The output shaft of the second motor 70 is transmission-connected to the reducer 60. The synchronous belt transmission assembly 80 includes a first synchronous wheel, a second synchronous wheel 801, and a synchronous belt 802. The first synchronous wheel is coaxially connected to the output shaft of the reducer 60, and the second synchronous wheel 801 is coaxially connected to the outlet end of the inflatable shaft. The first synchronous wheel and the second synchronous wheel 801 are transmission-connected via the synchronous belt 802. The diaphragm coil is put on the inflatable shaft. After high-pressure inflation, the surface of the inflatable shaft can protrude, thereby pressing the diaphragm coil against the shaft body. After deflation, the surface quickly retracts; the unwinding drive is used to drive the inflatable shaft to rotate, thereby unwinding the diaphragm coil on the inflatable shaft.

[0025] Optionally, an ion wind rod 40 is further provided on the film placing substrate 2 next to the upper roller assembly 5. On the lithium-ion battery production line, static electricity may absorb dust and impurities, affecting the manufacturing quality of the battery. The ion wind rod 40 generates a large number of positive and negative ions. These ions combine with the charges in the air to eliminate static electricity and improve the cleanliness of the production environment; a film guide plate 21 is provided at the lower part of the film placing substrate 2, and the middle roller assembly 7 and the lower roller assembly 8 are arranged on the film guide plate 21. A deionization air duct 50 is provided on the film guide plate 21 next to the lower roller assembly 8. The deionization air duct 50 provides pure air to blow to the diaphragm through filtration and deionization treatment to clean the dust and impurities on the diaphragm.

[0026] When the battery cell diaphragm unwinding device is working, the air shaft is driven to rotate by the unwinding drive to unwind the diaphragm roll, and the diaphragm passes through the upper roller assembly 5, the diaphragm swing roller mechanism 6, the middle roller assembly 7 and the lower roller assembly 8 in sequence. During the movement and supply of the diaphragm, the tension of the diaphragm can be detected by setting a tension sensor on the unwinding device. According to the tension, the diaphragm swing roller mechanism 6 is driven by the swinging drive 9 to swing to adjust the tension of the diaphragm. The rotary encoder 10 detects parameters such as the rotation angle, speed and direction of the tension rotating shaft 61, and the working state of the swinging drive 9 is controlled by the controller to adjust the specific swinging angle of the swing seat 62 and the swing roller assembly 63, thereby accurately adjusting the tension of the diaphragm.

[0027] It should be understood that all the above embodiments are illustrative rather than restrictive. Any modifications, equivalent changes and modifications made by those skilled in the art to the specific embodiments described above under the concept of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A battery cell diaphragm unwinding device, characterized by: It includes a correction substrate and a film-laying substrate that are perpendicular to each other; a correction mechanism is provided on the correction substrate, and the correction mechanism is connected to the film-laying substrate, which is used to drive the film-laying substrate to move in the horizontal direction; an air shaft, an upper roller assembly, a diaphragm swing roller mechanism, a middle roller assembly and a lower roller assembly are provided on the film-laying substrate, and the diaphragm swing roller mechanism is located beside the upper roller assembly, and the diaphragm swing roller mechanism includes a tension rotating shaft, a swing seat and a swing roller assembly, one end of the tension rotating shaft passes through the film-laying substrate and is rotatably connected to the film-laying substrate, the protruding end of the tension rotating shaft is connected with a swing driving member and a rotary encoder, the swing seat is installed on the tension rotating shaft, and the swing roller assembly is arranged on the swing seat.

2. The battery cell diaphragm unwinding device according to claim 1, characterized in that: The swing driving member includes a cylinder and a connecting block. The cylinder is hinged on the back of the film-laying substrate, and the output rod of the cylinder is hinged to the connecting block. The connecting block is fixedly connected to the outlet end of the tension rotating shaft.

3. The battery cell diaphragm unwinding device according to claim 1, characterized in that: The correction mechanism includes a ball screw pair, a first motor and a sliding shaft. The ball screw pair is horizontally arranged on the correction substrate. The output shaft of the first motor is connected to the screw of the ball screw pair. The sliding shaft is slidably arranged on the correction substrate, and one end of the sliding shaft is fixedly connected to the nut of the ball screw pair, and the other end is fixedly connected to the film placing substrate.

4. The battery cell diaphragm unwinding device according to claim 3, characterized in that: A linear guide rail parallel to the ball screw pair is installed on the deflection correction substrate, a sliding seat is installed on the slider of the linear guide rail, and the sliding seat is fixedly connected to the film placing substrate.

5. The battery cell diaphragm unwinding device according to claim 1, characterized in that: An ion wind rod is also provided on the film placing substrate and located beside the upper roller assembly.

6. The battery cell diaphragm unwinding device according to claim 1 or 5, characterized in that: A film guide plate is provided at the lower portion of the film placing substrate, the middle roller assembly and the lower roller assembly are provided on the film guide plate, and a deionized air duct is provided on the film guide plate beside the lower roller assembly.

7. The battery cell diaphragm unwinding device according to claim 1, characterized in that: One end of the inflatable shaft passes through the film-laying substrate and is rotatably connected to the film-laying substrate. The outlet end of the inflatable shaft is connected to a rewinding drive member, and the rewinding drive member includes a reducer, a second motor and a synchronous belt transmission assembly. The reducer is mounted on the back of the film-laying substrate, and the output shaft of the second motor is transmission-connected to the reducer. The synchronous belt transmission assembly includes a first synchronous wheel, a second synchronous wheel and a synchronous belt. The first synchronous wheel is coaxially connected to the output shaft of the reducer, and the second synchronous wheel is coaxially connected to the outlet end of the inflatable shaft. The first synchronous wheel and the second synchronous wheel are transmission-connected by the synchronous belt.

Images