Tension adjusting mechanism for pole piece production

Abstract

A tension adjusting mechanism for pole piece production comprises a pole piece tensioning device used for tensioning a pole piece wound on the pole piece tensioning device, a displacement sensing device arranged on one side of the pole piece tensioning device, connected with the pole piece tensioning device and used for obtaining the rotating variable quantity of the pole piece tensioning device, and a tension adjusting device rotationally connected with the displacement sensing device and used for adjusting the rotating variable quantity of the pole piece tensioning device. The tension adjusting device is used for pushing or pulling the displacement sensing device to drive the pole piece tensioning device to rotate, and the PLC control module is electrically connected with the displacement sensing device and the tension adjusting device and changes thrust or tension output by the tension adjusting device according to rotation variation obtained by the displacement sensing device; compared with the prior art, the rotating displacement variable quantity of the pole piece tensioning device is obtained through the displacement sensing device and transmitted to the PLC control module, and the PLC control module adjusts the thrust or tension output by the tension adjusting device according to the variable quantity so as to adjust the position of the pole piece tensioning device. And different pole pieces wound on the winding device are fully tensioned.

Description

Technical Field

[0001] The utility model relates to the technical field of pole piece production equipment, and particularly relates to a tension adjusting mechanism for pole piece production. Background Art

[0002] With the development and maturity of new energy technologies, the application of lithium batteries has become more and more extensive. In the actual production process of lithium batteries, multiple production processes are involved, and multiple different production equipment is required to complete different production processes, ultimately realizing the production work of lithium batteries. If the degree of equipment automation is low, a large number of manual workers are needed for auxiliary production, consuming a large amount of human, material and time costs, not only resulting in high production costs of lithium batteries, but also greatly reducing production efficiency. At the same time, manual auxiliary production is prone to human contact, introducing pollution sources and reducing the production quality of lithium batteries. For example, during the transmission of pole pieces, an automatic production device is required to keep the pole pieces under a consistent tension to ensure the transmission accuracy and surface flatness of the pole pieces.

[0003] To solve the above problems, Chinese Patent No. 202020020362.8 discloses a link-adjustable pole piece tensioning device. The disclosed link-adjustable pole piece tensioning device connects the output end of a tensioning cylinder to a roller bracket through a link assembly, and at the same time rotatably connects a tensioning roller to the lower part of the roller bracket. The tensioning cylinder drives the roller bracket to rotate and tension the pole piece passing through the tensioning roller. The disclosed link-adjustable pole piece tensioning device can only output a constant tension and cannot fully tension pole pieces in different states, resulting in the transmission accuracy and surface flatness of the pole pieces not meeting the production requirements. Summary of the Utility Model

[0004] Aiming at the above deficiencies, the technical problem to be solved by the utility model is to provide a tension adjusting mechanism for pole piece production, which adjusts the tension acting on the pole piece according to the state of the pole piece, so that different pole pieces can be fully tensioned to meet the requirements for the transmission accuracy and surface flatness of the pole piece during production.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is: a tension adjusting mechanism for pole piece production, including a pole piece tensioning device for tensioning the pole piece wound thereon; a displacement sensing device arranged on one side of the pole piece tensioning device and connected to the pole piece tensioning device for obtaining the rotational change amount of the pole piece tensioning device; a tension adjusting device rotatably connected to the displacement sensing device for pushing or pulling the displacement sensing device to drive the pole piece tensioning device to rotate; and a PLC control module electrically connected to the displacement sensing device and the tension adjusting device, which changes the thrust or pull force output by the tension adjusting device according to the rotational change amount obtained by the displacement sensing device.

[0006] As a preferred embodiment of the present utility model, the pole piece tensioning device includes a fixed support and a swing arm assembly. One end of the swing arm assembly is rotatably connected to the fixed support, and the other end winds around the pole piece.

[0007] As a preferred embodiment of the present utility model, the swing arm assembly includes a swing arm rotating shaft rotatably connected to the fixed support. The axis direction of the swing arm rotating shaft is parallel to the length direction of the fixed support; one end of the swing arm rotating shaft adjacent to the displacement sensing device extends outward, passes through the fixed support and is fixedly connected to the displacement sensing device.

[0008] As a preferred embodiment of the present utility model, the swing arm assembly further includes a first rotating swing arm and a general idler roller; one end of the first rotating swing arm is fixedly arranged on the swing arm rotating shaft, and the general idler roller is arranged at the other end of the first rotating swing arm.

[0009] As a preferred embodiment of the present utility model, the displacement sensing device includes a second rotating swing arm. The second rotating swing arm is connected to the pole piece tensioning device and moves synchronously with the pole piece tensioning device.

[0010] As a preferred embodiment of the present utility model, the displacement sensing device further includes a swing arm displacement sensor. The swing arm displacement sensor is arranged at one end of the second rotating swing arm far from the tension adjusting device.

[0011] As a preferred embodiment of the present utility model, limiting and buffering seats are arranged on both sides of the second rotating swing arm, and the second rotating swing arm moves between the two limiting and buffering seats.

[0012] As a preferred embodiment of the present utility model, an induction arc is formed at one end of the second rotating swing arm adjacent to the swing arm displacement sensor.

[0013] As a preferred embodiment of the present utility model, a buffer head facing the second rotating swing arm is formed on the limiting and buffering seat, and the buffer head is made of rubber material.

[0014] As a preferred embodiment of the present utility model, the tension adjusting device includes a piston cylinder and a cylinder push rod; one end of the cylinder push rod is connected to the piston cylinder, and the other end of the cylinder push rod is rotatably connected to the second rotating swing arm on the displacement sensing device.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows: The rotation displacement change amount generated by the pole piece tensioning device under the action of the pole piece is obtained through the displacement sensing device, and the rotation displacement change amount is transmitted to the PLC control module. The PLC control module changes the thrust or pull force output by the tension adjusting device according to the size of the rotation displacement change amount to adjust the position of the pole piece tensioning device, fully tension different pole pieces wound around the pole piece tensioning device, and meet the requirements of the transmission accuracy and surface flatness of the pole piece. Description of the Drawings

[0016] Figure 1 The structural schematic diagram of a tension adjusting mechanism for pole piece production provided by an embodiment of the present application;

[0017] Figure 2 The structural schematic diagram of the limit buffer seat provided by an embodiment of the present application;

[0018] Reference numerals: Pole piece tensioning device 1, fixed support 1-1, swing arm assembly 1-2, swing arm rotating shaft 1-21, first rotating swing arm 1-22, universal idler roller 1-23, displacement sensing device 2, second rotating swing arm 2-1, induction arc 2-11, swing arm displacement sensor 2-2, limit buffer seat 2-3, buffer head 2-31, tension adjusting device 3, piston cylinder 3-1, cylinder push rod 3-2. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application.

[0020] The following description provides examples and does not limit the scope, applicability, or examples set forth in the claims. Changes can be made to the functions and arrangements of the described elements without departing from the scope of the content of the present application. Various processes or components can be appropriately omitted, substituted, or added to each example. For example, the described methods can be executed in a different order from the described order, and various steps can be added, omitted, or combined. In addition, the features described in some examples can be combined into other examples.

[0021] Please refer to Figure 1 , Figure 1 which shows the structural schematic diagram of a tension adjusting mechanism for pole piece production provided by an embodiment of the present application. As Figure 1 shown, a tension adjusting mechanism for pole piece production includes a pole piece tensioning device 1 for tensioning the pole piece wound thereon; a displacement sensing device 2 disposed on one side of the pole piece tensioning device 1 and connected to the pole piece tensioning device 1 for obtaining the rotational change amount of the pole piece tensioning device 1; a tension adjusting device 3 rotatably connected to the displacement sensing device 2 for pushing or pulling the displacement sensing device 2 to drive the pole piece tensioning device 1 to rotate; a PLC control module electrically connected to the displacement sensing device 2 and the tension adjusting device 3, and changing the thrust or pull force output by the tension adjusting device 3 according to the rotational change amount obtained by the displacement sensing device 2.

[0022] Specifically, when the pole piece tensioning device 1 is in the initial tensioning position, the pole piece is passed through the pole piece tensioning device 1 and wound around the swing arm assembly 1-2 thereon. Due to gravity, the pole piece collapses to a certain extent and pulls the swing arm assembly 1-2 to rotate in the collapsing direction; the swing arm assembly 1-2 drives the displacement sensing device 2 arranged on one side of it to rotate synchronously in the collapsing direction. The swing arm displacement sensor 2-2 on the displacement sensing device 2 acquires the rotational displacement data of the displacement sensing device 2 and transmits this rotational displacement data to the PLC control module; the PLC control module adjusts the magnitude of the thrust or pulling force output by the tension adjusting device 3 according to this rotational displacement data. The tension adjusting device 3 pushes or pulls the displacement sensing device 2 to move in the opposite direction of the collapsing direction, and the displacement sensing device 2 synchronously drives the swing arm assembly 1-2 to move in the opposite direction of the collapsing direction until the pole piece tensioning device 1 is located at the initial tensioning position, realizing the tensioning of the pole piece; the larger the rotational displacement data obtained by the swing arm displacement sensor 2-2, the greater the thrust or pulling force controlled by the PLC control module to output by the tension adjusting device 3, and the smaller the rotational displacement data obtained by the swing arm displacement sensor 2-2, the smaller the thrust or pulling force controlled by the PLC control module to output by the tension adjusting device 3.

[0023] Preferably, the pole piece tensioning device 1 includes a fixed support 1-1 and a swing arm assembly 1-2. The fixed support 1-1 is connected to the external equipment frame to fix the pole piece tensioning device 1 on the external equipment frame; one end of the swing arm assembly 1-2 is rotatably connected to the fixed support 1-1, and the other end winds around the pole piece. The pole piece acts on the swing arm assembly 1-2 to make the swing arm assembly 1-2 rotate around the fixed support 1-1.

[0024] Preferably, the swing arm assembly 1-2 includes a swing arm rotating shaft 1-21 rotatably connected to the fixed support 1-1. The axis direction of the swing arm rotating shaft 1-21 is parallel to the length direction of the fixed support 1-1; one end of the swing arm rotating shaft 1-21 adjacent to the displacement sensing device 2 extends outward, passes through the fixed support 1-1 and is fixedly connected to the displacement sensing device 2. When the first rotating swing arm 1-22 rotates, it can synchronously drive the displacement sensing device 2 to rotate through the swing arm rotating shaft 1-21. Similarly, the displacement sensing device 2 can synchronously drive the first rotating swing arm 1-22 to rotate through the swing arm rotating shaft 1-21.

[0025] Preferably, the swing arm assembly 1-2 further includes a first rotating swing arm 1-22 and a universal roller 1-23; one end of the first rotating swing arm 1-22 is fixedly arranged on the swing arm rotating shaft 1-21, and the first rotating swing arm 1-22 rotates around the axis of the swing arm rotating shaft 1-21. The universal roller 1-23 is arranged at the other end of the first rotating swing arm 1-22, and the pole piece is wound around the universal roller 1-23.

[0026] Preferably, the displacement sensing device 2 includes a second rotating swing arm 2-1. The second rotating swing arm 2-1 is connected to the pole piece tensioning device 1 and moves synchronously with the pole piece tensioning device 1. The pole piece tensioning device 1 can drive the second rotating swing arm 2-1 to rotate in the same direction, and the second rotating swing arm 2-1 can also drive the pole piece tensioning device 1 to rotate in the same direction.

[0027] Preferably, the displacement sensing device 2 further includes a swing arm displacement sensor 2-2. The swing arm displacement sensor 2-2 is electrically connected to the PLC control module and is used to obtain the rotational displacement data of the second rotating swing arm 2-1. The swing arm displacement sensor 2-2 is arranged at one end of the second rotating swing arm 2-1 away from the tension adjusting device 3 and is fixed. When the second rotating swing arm 2-1 rotates driven by the swing arm assembly 1-2, the distance between the second rotating swing arm 2-1 and the swing arm displacement sensor 2-2 changes. The swing arm displacement sensor 2-2 measures the change in this distance and transmits the change in this distance to the PLC control module.

[0028] Preferably, an induction arc 2-11 is formed at one end of the second rotating swing arm 2-1 adjacent to the swing arm displacement sensor 2-2. Since the direction of winding the pole piece around the pole piece tensioning device 1 is different, the direction of movement of the pole piece tensioning device 1 driven by the pole piece under the action of gravity is also different. The symmetrically structured induction arc 2-11 meets the requirement for the swing arm displacement sensor 2-2 to obtain relevant rotational displacement data when the pole piece tensioning device 1 rotates clockwise and counterclockwise.

[0029] Optionally, the induction arc 2-11 can be replaced with a symmetrically arranged inclined plane structure.

[0030] Preferably, limiting and buffering seats 2-3 are arranged on both sides of the second rotating swing arm 2-1, and the second rotating swing arm 2-1 moves between the two limiting and buffering seats 2-3. The limiting and buffering seats 2-3, as anti-misalignment parts, limit the movement range of the second rotating swing arm 2-1 to prevent the output thrust or pull force from being too large due to a malfunction of the tension adjusting device 3 and exceeding the tension that the pole piece can withstand, thereby damaging the pole piece.

[0031] Preferably, a buffer head 2-31 facing the second rotating swing arm 2-1 is formed on the limiting and buffering seat 2-3. The buffer head 2-31 is made of rubber material to reduce the impact effect when the second rotating swing arm 2-1 may hit the limiting and buffering seat 2-3.

[0032] Preferably, the tension adjusting device 3 includes a piston cylinder 3-1 and a cylinder push rod 3-2; the cylinder push rod 3-2 is connected to the piston cylinder 3-1, and the piston cylinder 3-1 drives the cylinder push rod 3-2 to reciprocate; the other end of the cylinder push rod 3-2 is rotatably connected to the second rotating swing arm 2-1 on the displacement sensing device 2, converting the reciprocating linear motion of the cylinder push rod 3-2 into the reciprocating swing of the second rotating swing arm 2-1; at the same time, the piston cylinder 3-1 is electrically connected to the PLC control module, and the PLC control module controls the magnitude of the thrust or pull force output by the piston cylinder 3-1.

[0033] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0034] Although the terms such as the pole piece tensioning device 1, the fixed support 1-1, the swing arm assembly 1-2, the swing arm rotating shaft 1-21, the first rotating swing arm 1-22, the universal idler roller 1-23, the displacement sensing device 2, the second rotating swing arm 2-1, the induction arc 2-11, the swing arm displacement sensor 2-2, the limit buffer seat 2-3, the buffer head 2-31, the tension adjusting device 3, the piston cylinder 3-1, the cylinder push rod 3-2 and the like are used more in this article, the possibility of using other terms is not excluded. These terms are only used to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A tension adjusting mechanism for pole piece production, characterized in that, Comprising: A pole piece tensioning device (1) for tensioning the pole piece wound thereon; A displacement sensing device (2) arranged on one side of the pole piece tensioning device (1) and connected to the pole piece tensioning device (1) for obtaining the rotational change amount of the pole piece tensioning device (1); A tension adjusting device (3) rotatably connected to the displacement sensing device (2) for pushing or pulling the displacement sensing device (2) to drive the pole piece tensioning device (1) to rotate; A PLC control module electrically connected to the displacement sensing device (2) and the tension adjusting device (3), and changing the thrust or pull force output by the tension adjusting device (3) according to the rotational change amount obtained by the displacement sensing device (2).

2. The tension adjusting mechanism for pole piece production according to claim 1, wherein The pole piece tensioning device (1) includes a fixed support (1-1) and a swing arm assembly (1-2). One end of the swing arm assembly (1-2) is rotatably connected to the fixed support (1-1), and the other end winds the pole piece.

3. A tension adjusting mechanism for pole piece production according to claim 2, characterized in that, The swing arm assembly (1-2) includes a swing arm rotating shaft (1-21) rotatably connected to the fixed support (1-1). The axis direction of the swing arm rotating shaft (1-21) is parallel to the length direction of the fixed support (1-1); one end of the swing arm rotating shaft (1-21) adjacent to the displacement sensing device (2) extends outward, passes through the fixed support (1-1) and is fixedly connected to the displacement sensing device (2).

4. A tension adjusting mechanism for pole piece production according to claim 3, characterized in that, The swing arm assembly (1-2) further includes a first rotating swing arm (1-22) and a universal idler roller (1-23); one end of the first rotating swing arm (1-22) is fixedly arranged on the swing arm rotating shaft (1-21), and the universal idler roller (1-23) is arranged at the other end of the first rotating swing arm (1-22).

5. A tension adjusting mechanism for pole piece production according to claim 1, characterized in that, The displacement sensing device (2) includes a second rotating swing arm (2-1), and the second rotating swing arm (2-1) is connected to the pole piece tensioning device (1), and the second rotating swing arm (2-1) moves synchronously with the pole piece tensioning device (1).

6. The tension adjusting mechanism for pole piece production according to claim 5, characterized in that, The displacement sensing device (2) further includes a swing arm displacement sensor (2-2), and the swing arm displacement sensor (2-2) is arranged at one end of the second rotating swing arm (2-1) far from the tension adjusting device (3).

7. A tension adjusting mechanism for pole piece production according to claim 5, characterized in that, Limit buffer seats (2-3) are arranged on both sides of the second rotating swing arm (2-1), and the second rotating swing arm (2-1) moves between the two limit buffer seats (2-3).

8. A tension adjusting mechanism for pole piece production according to claim 6, characterized in that, An induction arc (2-11) is formed at one end of the second rotating swing arm (2-1) adjacent to the swing arm displacement sensor (2-2).

9. The tension adjusting mechanism for pole piece production according to claim 7, characterized in that, A buffer head (2-31) facing the second rotating swing arm (2-1) is formed on the limit buffer seat (2-3), and the buffer head (2-31) is made of rubber material.

10. A tension adjusting mechanism for pole piece production according to claim 5, characterized in that, The tension adjusting device (3) includes a piston cylinder (3-1) and a cylinder push rod (3-2); one end of the cylinder push rod (3-2) is connected to the piston cylinder (3-1), and the other end of the cylinder push rod (3-2) is rotatably connected to the second rotating swing arm (2-1) on the displacement sensing device (2).

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