Lithium battery ultra-wide diaphragm traction mechanism

Abstract

The utility model relates to the technical field of lithium battery manufacturing, in particular to a lithium battery ultra-wide diaphragm traction mechanism which comprises a mounting seat, a bearing seat, a linear motor, a controller, an encoder, a guide column, a sliding block and a clamping assembly, the linear motor is fixed between the bearing seat and the mounting seat, the guide column is fixed to the mounting seat and is in sliding connection with the sliding block, and the clamping assembly is arranged on the bearing seat. The multiple linear motors are arranged side by side at intervals in the length direction of the bearing base and electrically connected with the same controller, the encoder is electrically connected with the controller, the controller is used for controlling the multiple linear motors to operate synchronously, and the clamping assembly is arranged between the mounting base and the bearing base. And the linear motor is used for driving the mounting seat and the bearing seat to slide relatively so as to enable the clamping assembly to clamp the lithium battery diaphragm. The traction device has the beneficial effect that the flatness of the clamped lithium battery diaphragm during traction of the lithium battery diaphragm is improved.

Description

Technical Field

[0001] The present application relates to the technical field of lithium battery manufacturing, and in particular to an ultra-wide diaphragm traction mechanism for a lithium battery. Background Art

[0002] In the structure of lithium batteries, lithium battery separators are one of the key internal components. The performance of lithium battery separators determines the interface structure and internal resistance of the battery, and directly affects the battery's capacity, cycle and safety performance. Lithium battery separators with excellent performance play an important role in improving the overall performance of the battery. The main function of lithium battery separators is to separate the positive and negative electrodes of the battery to prevent the two electrodes from contacting and short-circuiting. In addition, it also has the function of allowing electrolyte ions to pass through.

[0003] The production and processing of lithium batteries involves the process of pulling the lithium battery separator. During the process of pulling the lithium battery separator, the lithium battery separator needs to be clamped. Usually, a driving motor is used to drive the clamping member to clamp the lithium battery separator.

[0004] However, there are situations where an extra-wide lithium battery diaphragm needs to be towed. Since the clamping piece needs to clamp various parts of the lithium battery diaphragm, the clamping piece will be correspondingly set longer. When the driving motor drives the longer clamping piece to move, the resistance and driving force encountered by various parts of the clamping piece are different, resulting in the lithium battery diaphragm being subjected to unbalanced and uneven force when the clamping piece clamps the lithium battery diaphragm during the process of towing the lithium battery diaphragm, causing the lithium battery diaphragm to be easily wrinkled and have low flatness. Therefore, there is still room for improvement. Utility Model Content

[0005] In order to improve the flatness of the lithium battery diaphragm when the lithium battery diaphragm is clamped, the present application provides a lithium battery ultra-wide diaphragm traction mechanism.

[0006] The present application provides a lithium battery ultra-wide diaphragm traction mechanism that adopts the following technical solution:

[0007] A lithium battery extra-wide diaphragm traction mechanism comprises a mounting seat, a supporting seat, a linear motor, a controller, an encoder, a guide column, a slider, and a clamping assembly, wherein the linear motor is fixed between the supporting seat and the mounting seat, the guide column is fixed on the mounting seat, the slider is fixed on the supporting seat, the guide column is slidably connected to the slider, a plurality of linear motors are provided, and the plurality of linear motors are arranged side by side at intervals along the length direction of the supporting seat, the plurality of linear motors are electrically connected to the same controller, the encoder is electrically connected to the controller, the controller is used to control the synchronous operation of the plurality of linear motors, the clamping assembly is provided between the mounting seat and the supporting seat, the linear motor is used to drive the mounting seat and the supporting seat to slide relative to each other so that the clamping assembly clamps the lithium battery diaphragm.

[0008] By adopting the above technical solution, several linear motors are electrically connected to the same controller, and the controller controls the several linear motors to operate synchronously. Since the clamping assembly is arranged between the mounting seat and the supporting seat, the linear motor is used to drive the mounting seat and the supporting seat to slide relative to each other so that the clamping assembly clamps the lithium battery diaphragm. The encoder measures the position of the output shaft movement of the linear motor and feeds back to the controller. After receiving the feedback, the controller controls the operation of the linear motor so that the relative sliding distance between the mounting seat and the supporting seat is appropriate. Several linear motors jointly provide driving force to multiple parts of the mounting seat, so that multiple parts of the mounting seat are subjected to force, so that the force exerted on the clamping assembly is more uniform, and the clamping force of the clamping assembly on the lithium battery diaphragm will also be more uniform, so that the force on the lithium battery diaphragm is balanced and uniform, and the flatness of the lithium battery diaphragm is clamped when the lithium battery diaphragm is pulled.

[0009] Preferably, the clamping assembly includes a first clamping block and a second clamping block, the first clamping block is fixed on the mounting seat, and the second clamping block is correspondingly fixed on the supporting seat, and the linear motor drives the first clamping block and the second clamping block to approach each other to clamp the lithium battery diaphragm.

[0010] By adopting the above technical solution, several linear motors drive the first clamping block and the second clamping block to approach each other to clamp the lithium battery diaphragm, so as to realize the clamping operation of the lithium battery diaphragm. The controller controls the several linear motors to operate synchronously, so that each part of the first clamping block on the mounting seat in the length direction approaches the second clamping block synchronously, so that the clamping force of the first clamping block and the second clamping block on the lithium battery diaphragm is more uniform, the force balance of the lithium battery diaphragm is uniform, and the flatness of the lithium battery diaphragm is improved when the lithium battery diaphragm is clamped when the lithium battery diaphragm is pulled.

[0011] Preferably, polymer protective layers are provided on both sides of the first clamping block and the second clamping block that are close to each other.

[0012] By adopting the above technical solution, the polymer protective layer protects the first clamping block and the second clamping block, and reduces the wear of the lithium battery diaphragm when the first clamping block and the second clamping block clamp the lithium battery diaphragm.

[0013] Preferably, the polymer protective layer may be any one of a polyetheretherketone layer, a polytetrafluoroethylene layer, a polycarbonate layer, a polymethyl methacrylate layer and a Teflon layer.

[0014] By adopting the above technical scheme, the polyetheretherketone layer, polytetrafluoroethylene layer, polycarbonate layer, polymethyl methacrylate layer and Teflon layer are all made of polymer materials with certain wear resistance, which can absorb the uneven force at individual positions caused by the first clamping block and the second clamping block clamping the lithium battery diaphragm, so as to better clamp the lithium battery diaphragm, play a wear-resistant role, and protect the lithium battery diaphragm from being clamped.

[0015] Preferably, a magnetic spring module is provided on the mounting seat, and the magnetic spring module is used to balance the gravity of the mounting seat.

[0016] By adopting the above technical solution, the magnetic spring module is used to balance the gravity of the mounting seat, which is beneficial to the operation of the linear motor.

[0017] Preferably, the magnetic spring module comprises a magnetic spring stator and a magnetic spring mover, the magnetic spring stator is mounted on the supporting seat, the magnetic spring mover is mounted on the mounting seat, and the magnetic spring stator and the magnetic spring mover are magnetically attracted to each other.

[0018] By adopting the above technical solution, a certain magnetic attraction force is generated between the magnetic spring stator and the magnetic spring mover, and the magnetic attraction force is provided to the mounting seat, so that the mounting seat has a force to overcome its own gravity, thereby reducing the load of the linear motor.

[0019] Preferably, a limiting block is fixed on the supporting seat, a waist-shaped hole is opened on the mounting seat, and the end of the limiting block passes through the waist-shaped hole.

[0020] By adopting the above technical solution, since the limit block is fixed on the supporting seat and the waist-shaped hole is opened on the mounting seat, when the mounting seat and the supporting seat slide relative to each other, the limit block slides in the waist-shaped hole, and the hole wall of the waist-shaped hole can play a limiting role on the limit block, so that the movement of the mounting seat is controlled within a suitable range, thereby limiting the clamping movement of the lower clamping block.

[0021] Preferably, the supporting seat is provided with a plurality of structural holes.

[0022] By adopting the above technical solution, the setting of the structural holes reduces the overall weight without affecting the overall strength, and saves processing materials.

[0023] To summarize, the present application includes at least one of the following beneficial technical effects: several linear motors are electrically connected to the same controller, and the controller controls the several linear motors to operate synchronously. Since the clamping assembly is arranged between the mounting seat and the supporting seat, the linear motor is used to drive the mounting seat and the supporting seat to slide relative to each other so that the clamping assembly clamps the lithium battery diaphragm. Several linear motors jointly provide driving force to multiple parts of the mounting seat, so that multiple parts of the mounting seat are subjected to force, so that the force exerted on the clamping assembly is more uniform, and the clamping force of the clamping assembly on the lithium battery diaphragm will also be more uniform, so that the force on the lithium battery diaphragm is balanced and uniform, thereby improving the flatness of the lithium battery diaphragm when the lithium battery diaphragm is clamped. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the lithium battery ultra-wide diaphragm traction mechanism of the embodiment of the present application.

[0025] Figure 2 It is a schematic diagram of the matching relationship between the mounting base, linear motor, magnetic spring module, slider and guide column of the embodiment of the present application.

[0026] Figure 3 It is a schematic diagram of the assembly relationship of the lithium battery ultra-wide diaphragm traction mechanism in the embodiment of the present application without the cover plate.

[0027] Figure 4 It is a schematic diagram of the assembly relationship of the lithium battery ultra-wide diaphragm traction mechanism in the embodiment of the present application without the cover plate from another perspective.

[0028] Figure 5 yes Figure 1 A partial enlarged schematic diagram of part A in FIG.

[0029] Explanation of the accompanying drawings: 1. Mounting seat; 2. Supporting seat; 3. Linear motor; 4. Guide column; 5. Slider; 6. Clamping assembly; 61. First clamping block; 62. Second clamping block; 7. Magnetic spring module; 71. Magnetic spring stator; 72. Magnetic spring mover; 8. Limiting block; 9. Waist-shaped hole; 10. Cover plate; 11. Structural hole; 12. Polymer protective layer. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-5 This application is described in further detail.

[0031] The present application embodiment discloses a lithium battery ultra-wide diaphragm traction mechanism. Figure 1 and Figure 2A lithium battery ultra-wide diaphragm traction mechanism includes a mounting seat 1, a supporting seat 2, a linear motor 3, a controller, an encoder, a guide column 4, a slider 5, and a clamping assembly 6. In this embodiment, the linear motor 3 is mainly composed of two modules, a magnetic plate and a coil, and is used in conjunction with the coil module to generate a variable magnetic field. A magnet is fixed on the magnetic plate so that the magnetic plate has a constant magnetic field. The coil module changes the magnetic field by changing the current, thereby generating a magnetic force between the magnetic plate and the coil module. The magnetic plate is fixed to the mounting seat 1 by glue, and the coil module is fixed to the supporting seat 2 by glue. The magnetic force can drive the mounting seat 1 and the supporting seat 2 to have relative displacement.

[0032] The guide column 4 is fixed on the mounting seat 1. In the present embodiment, four linear motors 3 are provided, and five guide columns 4 are provided. The five guide columns 4 are arranged in parallel, and a linear motor 3 is provided between every two guide columns 4. The four linear motors 3 and the five guide columns 4 are arranged side by side at intervals. The number of sliders 5 matches the number of guide columns 4. One side of the slider 5 is fixed on the supporting seat 2, and the guide column 4 is slidably connected with the other side of the slider 5. When the linear motor 3 is in operation, the guide column 4 and the slider 5 slide relative to each other, so that the mounting seat 1 and the supporting seat 2 slide relative to each other, and the guide column 4 plays a guiding role. The clamping assembly 6 is arranged between the mounting seat 1 and the supporting seat 2, and the linear motor 3 drives the mounting seat 1 and the supporting seat 2 to slide relative to each other so that the clamping assembly 6 clamps the lithium battery diaphragm.

[0033] Specifically, the clamping assembly 6 includes a first clamping block 61 and a second clamping block 62. The first clamping block 61 and the second clamping block 62 are arranged in parallel, and the length direction of the first clamping block 61 is consistent with the length direction of the mounting seat 1. The first clamping block 61 is fixed on the mounting seat 1, and the second clamping block 62 is fixed on the supporting seat 2. When the linear motor 3 is in operation, the second clamping block 62 remains stationary, and the first clamping block 61 moves closer to or away from the second clamping block 62 as the mounting seat 1 moves. When the first clamping block 61 approaches the second clamping block 62, the first clamping block 61 and the second clamping block 62 clamp the lithium battery diaphragm together.

[0034] The four linear motors 3 are electrically connected to the same controller, and the encoder is electrically connected to the controller. The encoder measures the position where the mounting seat drives the first clamping block 61 to slide, and feeds back to the controller. After receiving the feedback, the controller controls the current of the linear motor 3. The four linear motors 3 operate synchronously, so that the mounting seat 1 and the supporting seat 2 slide relative to each other by a corresponding distance, so that the clamping force of the first clamping block 61 and the second clamping block 62 on the lithium battery diaphragm is appropriate, and the encoder realizes precise control and adjustment of the linear motor 3, thereby reducing the occurrence of excessive or insufficient clamping force of the first clamping block 61 and the second clamping block 62 on the lithium battery diaphragm.

[0035] Since the controller controls the four linear motors 3 to operate synchronously, each part of the first clamping block 61 on the mounting seat 1 in the length direction is synchronously close to the second clamping block 62, so that the clamping force of the first clamping block 61 and the second clamping block 62 on the lithium battery diaphragm is more uniform, so that the force of the lithium battery diaphragm is evenly balanced, and the flatness of the lithium battery diaphragm when the lithium battery diaphragm is clamped is improved. The number of linear motors 3 can be reasonably set according to the length of the processed lithium battery diaphragm. When the length of the processed lithium battery diaphragm is longer, more linear motors 3 can be added, and the mounting seat 1 and the supporting seat 2 can be set longer accordingly, and vice versa.

[0036] Further, see Figure 3 and Figure 4 , a magnetic spring module 7 is arranged on the mounting seat 1, and the magnetic spring module 7 includes a magnetic spring stator 71 and a magnetic spring mover 72. The magnetic spring stator 71 is mounted on the supporting seat 2, and the magnetic spring mover 72 is mounted on the mounting seat 1. The magnetic spring stator 71 and the magnetic spring mover 72 are magnetically attracted to each other. Since the supporting seat 2 remains stationary when the linear motor 3 is in operation, the magnetic spring stator 71 remains stationary, and the magnetic spring mover 72 moves with the movement of the mounting seat 1. A certain magnetic attraction is generated between the magnetic spring stator 71 and the magnetic spring mover 72, and the magnetic attraction is provided to the mounting seat 1, so that the mounting seat 1 has a force to overcome its own gravity to balance its own gravity, so that the first clamping block 61 and the second clamping block 62 are in a force balance state no matter how far they are close to or far away from each other, thereby reducing the load of the linear motor 3.

[0037] Furthermore, a limiting block 8 is fixed on the supporting seat 2, and two limiting blocks 8 are provided. The two limiting blocks 8 are arranged in parallel and spaced apart. The limiting blocks 8 are fixed vertically to the supporting plate. A waist-shaped hole 9 is correspondingly provided on the mounting seat 1. The end of the limiting block 8 passes through the waist-shaped hole 9. The area of ​​the waist-shaped hole 9 is larger than the area of ​​the limiting block 8, so that the limiting block 8 has a certain activity space in the waist-shaped hole 9. When the mounting seat 1 and the supporting seat 2 slide relative to each other, the limiting block 8 slides in the waist-shaped hole 9, and the hole wall of the waist-shaped hole 9 can play a limiting role on the limiting block 8, so that the movement of the mounting seat 1 is controlled within a suitable range, thereby limiting the clamping movement of the first clamping block 61.

[0038] In addition, the support seat 2 is provided with a plurality of structural holes 11. A cover plate 10 is fixed to the side surface of the support seat 2 away from the slider 5, and the cover plate 10 covers the structural holes 11. The arrangement of the structural holes 11 reduces the overall weight without affecting the overall strength, and saves processing materials. The cover plate 10 covers the structural holes 11, so that it is not easy for dirt to hide in the structural holes 11.

[0039] Further, see Figure 1 and Figure 5, a polymer protective layer 12 is provided on both sides where the first clamping block 61 and the second clamping block 62 are close to each other. The polymer protective layer 12 can be any one of a polyetheretherketone layer, a polytetrafluoroethylene layer, a polycarbonate layer, a polymethyl methacrylate layer and a Teflon layer. The polyetheretherketone layer, the polytetrafluoroethylene layer, the polycarbonate layer, the polymethyl methacrylate layer and the Teflon layer are all made of polymer materials with certain wear resistance, which can absorb the uneven force at individual positions caused by the first clamping block 61 and the second clamping block 62 clamping the lithium battery diaphragm, so as to better clamp the lithium battery diaphragm and play a wear-resistant role. The polymer protective layer 12 plays a protective role on the first clamping block 61 and the second clamping block 62, reduces the wear of the lithium battery diaphragm when the first clamping block 61 and the second clamping block 62 clamp the lithium battery diaphragm, and protects the lithium battery diaphragm from being clamped.

[0040] The implementation principle of the ultra-wide diaphragm traction mechanism of a lithium battery in the embodiment of the present application is:

[0041] When the linear motor 3 is in operation, the guide column 4 and the slider 5 slide relative to each other, so that the mounting seat 1 and the supporting seat 2 slide relative to each other. At this time, the supporting seat 2 and the second clamping block 62 remain stationary, and the first clamping block 61 moves toward or away from the second clamping block 62 as the mounting seat 1 moves, and the magnetic spring mover 72 moves with the movement of the mounting seat 1. When the first clamping block 61 approaches the second clamping block 62, the first clamping block 61 and the second clamping block 62 clamp the lithium battery diaphragm together. A certain magnetic attraction is generated between the magnetic spring stator 71 and the magnetic spring mover 72, and the magnetic attraction is provided to the mounting seat 1, so that the mounting seat 1 has a force to overcome its own gravity to balance its own gravity. The controller controls the four linear motors 3 to operate synchronously, so that each part of the first clamping block 61 on the mounting seat 1 in the length direction synchronously approaches the second clamping block 62, so that the clamping force of the first clamping block 61 and the second clamping block 62 on the lithium battery diaphragm is more uniform, so that the force of the lithium battery diaphragm is evenly balanced.

[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A lithium battery ultra-wide diaphragm traction mechanism, characterized by: The invention comprises a mounting seat (1), a supporting seat (2), a linear motor (3), a controller, an encoder, a guide column (4), a slider (5), and a clamping assembly (6), wherein the linear motor (3) is fixed between the supporting seat (2) and the mounting seat (1), the guide column (4) is fixed on the mounting seat (1), the slider (5) is fixed on the supporting seat (2), the guide column (4) and the slider (5) are slidably connected, and the linear motor (3) is provided with a plurality of linear motors (3). ) are arranged side by side at intervals along the length direction of the supporting seat (2), a plurality of the linear motors (3) are electrically connected to the same controller, the encoder is electrically connected to the controller, the controller is used to control the synchronous operation of the plurality of the linear motors (3), the clamping assembly (6) is arranged between the mounting seat (1) and the supporting seat (2), the linear motor (3) is used to drive the mounting seat (1) and the supporting seat (2) to slide relative to each other so that the clamping assembly (6) clamps the lithium battery diaphragm.

2. The ultra-wide diaphragm traction mechanism for a lithium battery according to claim 1, characterized in that: The clamping assembly (6) comprises a first clamping block (61) and a second clamping block (62), wherein the first clamping block (61) is fixed on the mounting seat (1), and the second clamping block (62) is correspondingly fixed on the supporting seat (2), and the linear motor (3) drives the first clamping block (61) and the second clamping block (62) to approach each other to clamp the lithium battery diaphragm.

3. The ultra-wide diaphragm traction mechanism for a lithium battery according to claim 1, characterized in that: A magnetic spring module (7) is provided on the mounting seat (1), and the magnetic spring module (7) is used to balance the gravity of the mounting seat (1).

4. The ultra-wide diaphragm traction mechanism for a lithium battery according to claim 3, characterized in that: The magnetic spring module (7) comprises a magnetic spring stator (71) and a magnetic spring mover (72); the magnetic spring stator (71) is mounted on the supporting seat (2); the magnetic spring mover (72) is mounted on the mounting seat (1); the magnetic spring stator (71) and the magnetic spring mover (72) are magnetically attracted to each other.

5. The ultra-wide diaphragm traction mechanism for a lithium battery according to claim 2, characterized in that: A polymer protective layer (12) is provided on both sides of the first clamping block (61) and the second clamping block (62) that are close to each other.

6. The ultra-wide diaphragm traction mechanism for a lithium battery according to claim 5, characterized in that: The polymer protective layer (12) may be any one of a polyetheretherketone layer, a polytetrafluoroethylene layer, a polycarbonate layer, a polymethyl methacrylate layer and a Teflon layer.

7. The ultra-wide diaphragm traction mechanism for a lithium battery according to claim 1, characterized in that: A limiting block (8) is fixed on the supporting seat (2), a waist-shaped hole (9) is provided on the mounting seat (1), and an end of the limiting block (8) passes through the waist-shaped hole (9).

8. The ultra-wide diaphragm traction mechanism for a lithium battery according to claim 1, characterized in that: The supporting seat (2) is provided with a plurality of structural holes (11).

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