Tension control device and method for a rolling zone

Abstract

This invention provides a tension control device and method for a roller pressing zone. A detection module detects the real-time position of the oscillating roller and the real-time tension of the electrode sheet at its corresponding position on each pressing roller, and sends the detected real-time position and tension to a control module. The control module controls the operating state of a first motor based on the received real-time position and tension. This invention utilizes the real-time position of the oscillating roller combined with the real-time tension of the electrode sheet to adjust the tension of the electrode sheet in the roller pressing zone, alleviating the problem of uneven tension distribution of the electrode sheet when the pressing rollers are opened, which is present in existing tension control methods for roller pressing zones, thereby ensuring the processing quality of the electrode sheet.

Description

Technical Field

[0001] This invention relates to the field of lithium battery production technology, and in particular to a tension control device and method for a rolling zone. Background Technology

[0002] Electrode manufacturing is an important part of the overall lithium battery manufacturing process. The main processes of electrode manufacturing include unwinding, coating, drying, rolling, slitting, sheet making, die cutting and rewinding. The rolling effect has a significant impact on the quality of electrode production. The rolling zone usually needs to be set with multiple pressure rollers to achieve multi-stage rolling of the electrode to ensure that the rolling effect meets the quality requirements of electrode production.

[0003] Currently, existing technologies for tension control in the rolling zone often focus on improving the tension control structure between the pressure rollers, but do not improve the tension control method between the pressure rollers. Therefore, the existing tension control method in the rolling zone has the following problems: When the pressure roller is rolling, it plays a tension isolation role before and after the position of the electrode being rolled. When a defect is detected in the electrode and the pressure roller needs to be opened to avoid it, once the pressure roller is opened, the tension isolation effect of the electrode at the rolling position disappears. Since the tension control structure connected to the winding end and unwinding end of the pressure roller is uncontrollable, the tension on the electrode will be too uneven in the rolling zone, which will affect the processing quality of the electrode. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a tension control device and method for the rolling zone, so as to alleviate the problem of uneven tension distribution of the electrode sheet when the pressure roller in the rolling zone is opened in the existing tension control method of the rolling zone, thereby ensuring the processing quality of the electrode sheet.

[0005] In a first aspect, embodiments of the present invention provide a tension control device for a rolling zone, the rolling zone including multiple pressure rollers; the tension control device includes a swing roller structure, a detection module, and a control module; two adjacent pressure rollers are connected through the swing roller structure, the swing roller structure including a swing roller that can be oscillated, the swing roller being driven to oscillate by a first motor; the control module is connected to the detection module, the first motor, and each pressure roller respectively; the detection module is used to detect the real-time position of the swing roller and the real-time tension of the electrode at each corresponding work position of each pressure roller, and sends the detected real-time position and real-time tension to the control module; the control module is used to control the working state of the first motor according to the received real-time position and real-time tension.

[0006] Secondly, embodiments of the present invention also provide a tension control method for a roller pressing zone. The tension control method is applied to the tension control device described in the first aspect above. The tension control method includes: the detection module detecting the real-time position of the swing roller and the real-time tension of the electrode at each corresponding work station of each pressing roller, and sending the detected real-time position and real-time tension to the control module; the control module controlling the working state of the first motor according to the received real-time position and real-time tension.

[0007] This invention provides a tension control device and method for a roller pressing zone. A detection module detects the real-time position of the oscillating roller and the real-time tension of the electrode sheet at its corresponding position on each pressing roller, and sends the detected real-time position and tension to a control module. The control module controls the operating state of a first motor based on the received real-time position and tension. Using this technology, the tension of the electrode sheet in the roller pressing zone can be adjusted by combining the real-time position of the oscillating roller with the real-time tension of the electrode sheet. This alleviates the problem of uneven tension distribution of the electrode sheet when the pressing rollers are opened, which is present in existing tension control methods for roller pressing zones, thereby ensuring the processing quality of the electrode sheet.

[0008] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained in accordance with the structures particularly pointed out in the description, claims and drawings.

[0009] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0010] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the structure of the roller pressing zone in an embodiment of the present invention;

[0012] Figure 2 This is a schematic diagram of the tension control device in an embodiment of the present invention;

[0013] Figure 3 This is a schematic diagram showing the connection of the traction structure, detection module, and control module in an embodiment of the present invention;

[0014] Figure 4 This is an example diagram of the swing roller structure in an embodiment of the present invention;

[0015] Figure 5 This is a schematic flowchart of a tension control method for a roller pressing zone in an embodiment of the present invention.

[0016] Icons: 100-Pressure roller; 10-Swing roller structure; 11-Swing roller; 12-First motor; 13-Swing arm; 14-Limit block; 20-Detection module; 30-Control module; 40-Traction structure; 41-Driven roller; 42-Driven roller; 43-Second motor; 50-First intermediate roller; 60-Second intermediate roller. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Currently, the existing tension control method in the rolling zone, when detecting a defect in the electrode sheet and needing to open the pressure roller to avoid it, causes the tension isolation effect of the electrode sheet at the rolling position to disappear once the pressure roller is opened. Since the tension control structure connected to the winding and unwinding ends of the pressure roller acts on the electrode sheet without control, this will lead to excessively uneven tension distribution of the electrode sheet in the rolling zone, affecting the processing quality of the electrode sheet.

[0019] Based on this, the tension control device and method for the rolling zone provided by the present invention can alleviate the problem of uneven tension distribution of the electrode sheet when the pressure roller in the rolling zone is opened, which exists in the existing tension control method of the rolling zone, thereby ensuring the processing quality of the electrode sheet.

[0020] To facilitate understanding of this embodiment, a detailed description of a tension control device for a roller pressing zone disclosed in this embodiment of the invention will be provided first. (See [link to relevant documentation]). Figure 1 As shown, the rolling zone may include multiple pressure rollers 100; adjacent pressure rollers 100 are connected by a swing roller structure 10. During electrode production, the electrode enters the rolling zone after passing through the winding input and unwinding output of the swing roller structure 10. It then sequentially passes through the winding input, rolling, and unwinding output of each pressure roller 100 in the rolling zone, as well as the winding input and unwinding output of the swing roller structure 10 connected to the unwinding end of each pressure roller 100, before continuing to the next pressure roller 100 for winding input, rolling, and unwinding output. Along the electrode's running direction, it is generally necessary to maintain a uniform tension distribution of the electrode in the rolling zone.

[0021] See Figure 2As shown, the tension control device may include a swing roller structure 10, a detection module 20, and a control module 30. The swing roller structure 10 may include a swing roller 11 that can be oscillated, and the swing roller 11 is driven to oscillate by a first motor 12. The control module 30 is connected to the detection module 20, the first motor 12, and each pressure roller 100. The detection module 20 can be used to detect the real-time position of the swing roller 11 and the real-time tension of the electrode at its corresponding position on each pressure roller 100, and send the detected real-time position and real-time tension to the control module 30. The control module 30 can be used to control the working state of the first motor 12 according to the received real-time position and real-time tension. After the electrode enters the rolling zone, the tension of the electrode when rolling two adjacent pressure rollers 100 can be adjusted by driving the swing roller 11 to oscillate. Even when one or more pressure rollers 100 are opened, the tension of the electrode in the rolling zone can still be adjusted by controlling the working state of the corresponding first motor 12, thereby keeping the tension of the electrode in the rolling zone relatively stable.

[0022] This invention provides a tension control device for a roller pressing zone. A detection module detects the real-time position of the oscillating roller and the real-time tension of the electrode sheet at its corresponding position on each pressing roller, and sends the detected real-time position and tension to a control module. The control module controls the operating state of a first motor based on the received real-time position and tension. Using this tension control device, the tension of the electrode sheet in the roller pressing zone can be adjusted by combining the real-time position of the oscillating roller with the real-time tension of the electrode sheet. This alleviates the problem of uneven tension distribution of the electrode sheet when the pressing rollers are opened, which is present in existing tension control methods for roller pressing zones, thereby ensuring the processing quality of the electrode sheet.

[0023] As one possible implementation method, see Figure 2 As shown, the control module 30 can also be used to: determine the first deviation between the real-time tension of the electrode sheet at the corresponding station of each pressure roller 100 and the preset standard tension, the second deviation between the real-time position of the swing roller 11 of the swing roller structure 10 connected to the winding end of each pressure roller 100 and its corresponding preset standard position, and the third deviation between the real-time position of the swing roller 11 of the swing roller structure 10 connected to the unwinding end of each pressure roller 100 and its corresponding preset standard position; for each pressure roller 100, control the working state of the first motor 12 of the swing roller structure 10 connected to the winding end and the unwinding end of the pressure roller 100 respectively based on the first deviation, the second deviation and the third deviation corresponding to the pressure roller 100.

[0024] Specifically, the preset standard tension F0 and the preset standard position corresponding to each swing roller 11 can be stored in the control module 30 in advance. For a certain pressure roller 100, after the control module 30 receives the real-time position M1 of the swing roller 11 of the swing roller structure 10 connected to the winding end of the pressure roller 100, the real-time position M2 of the swing roller 11 of the swing roller structure 10 connected to the unwinding end of the pressure roller 100, and the real-time tension F1 of the electrode at the corresponding station of the pressure roller 100 detected by the detection module 20, the control module 30 performs the following operations: determines the first deviation between the real-time tension F1 and F0 of the electrode at the corresponding station of the pressure roller 100, M1 and its corresponding preset... If the first deviation corresponding to the pressure roller 100 is not within the preset first deviation range, a first control signal is sent to the first motor 12 of the oscillating roller structure 10 connected to the winding end of the pressure roller 100 based on the second deviation corresponding to the pressure roller 100 and the preset standard position. At the same time, a second control signal is sent to the first motor 12 of the oscillating roller structure 10 connected to the unwinding end of the pressure roller 100 based on the third deviation and its corresponding preset standard position. The first control signal and the second control signal are used to control the corresponding first motor 12 to drive the oscillation of the corresponding oscillating roller 11. Using this operation mode, after a pressure roller 100 is opened, the control module 30 can use the pre-stored preset standard tension and corresponding preset standard position, as well as the corresponding real-time tension and corresponding real-time position detected by the detection module 20, to drive and control the upstream and downstream oscillating rollers 11 of the pressure roller, and then adjust the tension of the electrode sheet when the pressure roller 100 is opened by adjusting the real-time position of the upstream and downstream oscillating rollers 11.

[0025] As an example, see Figure 2 As shown, for a certain pressure roller 100, the control module 30 can determine the first deviation by: calculating the absolute value of the difference between the real-time tension F1 corresponding to the pressure roller 100 and the preset standard tension F0 (i.e., |F1-F0|), and calculating the ratio between the absolute value and the preset standard tension F0 (i.e., |F1-F0|÷F0), and then using the ratio as the first deviation corresponding to the pressure roller 100.

[0026] As one possible implementation method, see Figure 2As shown, the aforementioned real-time position can be the real-time coordinate value of the corresponding swing roller 11, and the aforementioned preset standard position can be the preset standard coordinate value of the corresponding swing roller 11. Based on this, for a certain pressure roller 100, the control module 30 can determine the second deviation and the third deviation in the following ways: calculate the first distance L1 between the real-time coordinate value M1 of the swing roller 11 of the swing roller structure 10 connected to the winding end of the pressure roller 100 and its corresponding preset standard coordinate value M0, and the second distance L2 between the real-time coordinate value M2 of the swing roller 11 of the swing roller structure 10 connected to the unwinding end of the pressure roller 100 and its corresponding preset standard coordinate value M0. Calculate the second deviation corresponding to the pressure roller 100 based on the first distance L1 and the preset standard coordinate value M0, and calculate the third deviation corresponding to the pressure roller based on the second distance L2 and the preset standard coordinate value M0.

[0027] As an example, the operation mode of the control module 30 in calculating the second deviation based on L1 and M0 and the third deviation based on L2 and M0 can be as follows: the ratio between L1 and M0 (i.e., L1÷M0) is calculated as the second deviation corresponding to the pressure roller 100, and the ratio between L2 and M0 (i.e., L2÷M0) is calculated as the third deviation corresponding to the pressure roller 100.

[0028] As one possible implementation method, see Figure 2 and Figure 3 As shown, each pressure roller 100 is provided with a traction structure 40, which may include an active roller 41 and a driven roller 42 arranged vertically. The active roller 41 is driven to rotate by a second motor 43. Based on this, the detection module 20 can also be used to detect the real-time speed of each second motor 43 and send the detected real-time speed to the control module 30. The control module 30 can also be used to: determine the fourth deviation between the real-time speed of each second motor 43 and the preset standard speed; and for each pressure roller 100, control the working state of the second motor of the pressure roller based on the preset standard speed and the fourth deviation corresponding to the pressure roller.

[0029] Specifically, a preset standard rotational speed V0 can be stored in the control module 30 in advance. For a certain pressure roller 100, after the control module 30 receives the real-time rotational speed V of the second motor 43 of the pressure roller 100 detected by the detection module 20, the control module 30 performs the following operations: determine the fourth deviation between V and V0. If the fourth deviation corresponding to the pressure roller is not within the preset second deviation range, then a third control signal is sent to the second motor 43 of the pressure roller 100 based on the fourth deviation and the preset standard rotational speed V0. The third control signal is used to control the corresponding second motor 43 to drive the rotation of the corresponding active roller 41.

[0030] As an example, see Figure 2 and Figure 3As shown, for a certain pressure roller 100, the control module 30 can determine the fourth deviation by: calculating the absolute value of the difference between the real-time speed V corresponding to the pressure roller 100 and the preset standard speed V0 (i.e., |V-V0|), and calculating the ratio between the absolute value and the preset standard speed V0 (i.e., |V-V0|÷V0), and then using the ratio as the fourth deviation corresponding to the pressure roller 100.

[0031] As one possible implementation method, see Figure 2 and Figure 4 As shown, the swing roller structure 10 may further include a swing arm 13, one end of which is fixedly connected to the output shaft of the first motor 12, and the other end of which is fixedly connected to the rotating shaft of the swing roller 11. With this structural design, the swing arm 13 can be driven to swing by the first motor 12, thereby changing the position of the swing roller 11 and thus realizing the tension adjustment of the electrode sheet.

[0032] As one possible implementation method, see Figure 4 As shown, the swing roller structure 10 may further include two limiting blocks 14 fixedly arranged along the swing direction of the swing roller 11; when the swing arm 13 swings, the two limiting blocks 14 can limit the swing of the swing arm 13 in its swing direction, so as to limit the swing angle of the swing arm 13 within a certain range, thereby avoiding the swing angle of the swing arm 13 being too large and affecting the normal production of the electrode sheet. Based on this, the above-mentioned real-time position is located between the two limiting blocks 14 of the corresponding swing roller structure 10.

[0033] To facilitate understanding, the working principle of the above-mentioned tension control device is described exemplarily below using a specific application as an example.

[0034] As an example, see Figures 1 to 4 As shown, the rolling zone includes multiple pressure rollers 100, with adjacent pressure rollers 100 connected by a swing roller structure 10; the tension control device includes a swing roller structure 10, a detection module 20, and a control module 30. The swing roller structure 10 includes a swing roller 11 and a first motor ( Figure 4(Not shown in the diagram) A swing arm 13 and two limiting blocks 14 fixedly arranged along the swing direction of the swing roller 11 are provided. One end of the swing arm 13 is fixedly connected to the output shaft of the first motor 12, and the other end of the swing arm 13 is fixedly connected to the rotating shaft of the swing roller 11. Each pressure roller 100 is provided with a traction structure 40, which includes a second motor 43 and an upper and lower active roller 41 and a driven roller 42. The rotating shaft of the active roller 41 is fixedly connected to the output shaft of the second motor 43. The active roller 41 can be driven to rotate by the second motor 43, thereby tractioning the electrode sheet forward between the active roller 41 and the driven roller 42. The swing arm 13 can be driven by the first motor to swing within the swing angle range limited by the two limiting blocks 14. This enables tension adjustment of the electrode sheet; the tension control device also includes a first intermediate roller 50 and a second intermediate roller 60. The first intermediate roller 50, the swing roller 11, the second intermediate roller 60 and the traction structure 40 are arranged sequentially in the electrode sheet transport direction. The first intermediate roller 50 and the second intermediate roller 60 play a further guiding role in the transport of the electrode sheet, further improving the stability of the electrode sheet transport direction; the detection module includes a tension sensor corresponding to each pressure roller 100, a speed sensor corresponding to each second motor and a position sensor corresponding to each swing roller structure 10; the control module 30 is connected to each tension sensor, each speed sensor, each position sensor, each first motor 12 and each second motor 43 respectively. The real-time tension of the electrode sheet at the corresponding work station of the corresponding pressure roller 100 is detected by each tension sensor and sent to the control module 30; the real-time speed of the corresponding second motor 43 is detected by each speed sensor and sent to the control module 30; the real-time position of the corresponding swing roller 11 is detected by each position sensor and sent to the control module 30; the control module 30 has pre-stored a preset standard tension F0, a preset standard speed V0 and a preset standard position corresponding to each swing roller 11.

[0035] When a pressure roller 100 is opened, the tension sensor corresponding to that pressure roller has detected the real-time tension F1 of the electrode at the corresponding work position of the pressure roller 100, the real-time coordinate value M1 of the swing roller 11 (or upstream swing roller) of the swing roller structure 10 (or upstream swing roller structure) connected to the winding end of the pressure roller 100, the real-time coordinate value M2 of the swing roller 11 (or downstream swing roller) of the swing roller structure 10 (or downstream swing roller structure) connected to the unwinding end of the pressure roller 100, and the real-time rotational speed V of the second motor 43 of the pressure roller 100. The control module 30 is provided with a value. The control module 30 can calculate |F1-F0| ÷ F0 > 30% to indicate that the pressure roller 100 is open. The control module 30 can also calculate the first distance L1 between M1 and its corresponding preset standard coordinate value M0, and the first distance L2 between M2 and its corresponding preset standard coordinate value M0, and then calculate L1 ÷ M0 and L2 ÷ M0. If L1 ÷ M0 > 10%, the control module 30 sends a corresponding control signal to the first motor 12 of the upstream swing roller structure to control the output shaft of the first motor 12 according to V1. The rotation speed V1 = n1 × L1 drives the corresponding swing arm 13 to swing, thereby causing the upstream swing roller to move until L1 ÷ M0 ≤ 10%, where n1 is a constant coefficient; if L1 ÷ M0 ≤ 10%, the control module 30 sends a corresponding control signal to the first motor 12 of the upstream swing roller structure to control the output shaft of the first motor 12 to rotate at a speed V1 = n1 × L1, thereby driving the corresponding swing arm 13 to swing and causing the upstream swing roller to keep L1 ÷ M0 unchanged; if L2 ÷ M0 > 10%, the control module 30 sends a corresponding control signal to the first motor 12 of the downstream swing roller structure. The first motor 12 sends a corresponding control signal to control the output shaft of the first motor 12 to rotate at a speed of V2 = n2 × L2, thereby driving the corresponding swing arm 13 to swing and thus driving the downstream swing roller to move until L2 ÷ M0 ≤ 10%, where n2 is a constant coefficient; if L2 ÷ M0 ≤ 10%, the control module 30 sends a corresponding control signal to the first motor 12 of the downstream swing roller structure to control the output shaft of the first motor 12 to rotate at a speed of V2 = n2 × L2, thereby driving the corresponding swing arm 13 to swing and thus driving the downstream swing roller to keep L2 ÷ M0 unchanged. When the pressure roller 100 is opened, the control module 30 can also calculate |V-V0| ÷ V0; if |V-V0| ÷ V0 > 10%, the control module 30 sends a corresponding control signal to the second motor 43 of the pressure roller 100 to control the output shaft of the second motor 43 to rotate at a speed V3 of V3 = n3 × |V-V0|, thereby driving the corresponding swing arm 13 to swing and thus driving the downstream swing roller to move until |V-V0| ÷ V0 ≤ 10%, where n3 is a constant coefficient; if |V-V0| ÷ V0 ≤ 10%, the control module 30 sends a corresponding control signal to the second motor 43 of the pressure roller 100 to control the working state of the second motor 43 to remain unchanged.

[0036] The advantages of the above-mentioned tension control device compared with the prior art are as follows: when a pressure roller is opened in the rolling zone, the tension of the upstream and downstream swing rollers acting on the electrode is adjusted by reasonably controlling the position of the upstream and downstream swing rollers of the opened pressure roller, so as to reasonably adjust the tension distribution of the electrode when a pressure roller is opened in the rolling zone, thereby ensuring the processing quality of the electrode.

[0037] Based on the above-described tension control device, this embodiment of the invention also provides a tension control method for the roller pressing zone. This tension control method can be applied to the above-described tension control device. See [link to relevant documentation]. Figure 5 As shown, the tension control method may include:

[0038] In step S502, the detection module detects the real-time position of the swing roller and the real-time tension of the electrode at each corresponding station of the pressure roller, and sends the detected real-time position and real-time tension to the control module.

[0039] In step S504, the control module controls the working state of the first motor based on the received real-time position and real-time tension.

[0040] The tension control method provided in this embodiment of the invention has the same implementation principle and technical effect as the aforementioned tension control device embodiment. For the sake of brevity, any parts not mentioned in the method embodiment can be referred to the corresponding content in the aforementioned device embodiment.

[0041] Unless otherwise specifically stated, the relative steps, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention.

[0042] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a processor-executable, non-volatile, computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the tension control method described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0043] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A tension control device for a roller pressing zone, characterized in that, The rolling zone includes multiple pressure rollers (100); the tension control device includes a swing roller structure (10), a detection module (20), and a control module (30); two adjacent pressure rollers (100) are connected through the swing roller structure (10), the swing roller structure (10) includes a swing roller (11) that can be swinged, and the swing roller (11) is driven to swing by a first motor (12); the control module (30) is connected to the detection module (20), the first motor (12), and each pressure roller (100); the detection module (20) is used to detect the real-time position of the swing roller (11) and the real-time tension of the electrode at each corresponding work position of each pressure roller (100), and sends the detected real-time position and real-time tension to the control module (30); the control module (30) is used to control the working state of the first motor (12) according to the received real-time position and real-time tension; The control module (30) is further configured to: determine the first deviation between the real-time tension of the electrode sheet at the corresponding station of each pressure roller (100) and the preset standard tension, the second deviation between the real-time position of the swing roller (11) of the swing roller structure (10) connected to the winding end of each pressure roller (100) and its corresponding preset standard position, and the third deviation between the real-time position of the swing roller (11) of the swing roller structure (10) connected to the unwinding end of each pressure roller (100) and its corresponding preset standard position; for each pressure roller (100), control the winding end and unwinding end of the pressure roller (100) respectively based on the first deviation, the second deviation and the third deviation corresponding to the pressure roller (100). The working state of the first motor (12) of the self-connected swing roller structure (10); when a pressure roller (100) is opened, for each pressure roller (100) that is opened, the upstream swing roller (11) and the downstream swing roller (11) of the pressure roller (100) are driven and controlled by the pre-stored preset standard tension and corresponding preset standard position, as well as the corresponding real-time tension and corresponding real-time position detected by the detection module (20), and then the tension of the electrode sheet when the pressure roller (100) is opened is adjusted by adjusting the real-time position of the upstream swing roller (11) and the downstream swing roller (11) of the pressure roller (100).

2. The tension control device according to claim 1, characterized in that, The control module (30) is further configured to: for each pressure roller (100), if the first deviation corresponding to the pressure roller (100) is not within the preset first deviation range, send a first control signal to the first motor (12) of the swing roller structure (10) connected to the winding end of the pressure roller (100) based on the second deviation corresponding to the pressure roller (100) and the preset standard position, and at the same time send a second control signal to the first motor (12) of the swing roller structure (10) connected to the unwinding end of the pressure roller (100) based on the third deviation and its corresponding preset standard position; wherein, the first control signal and the second control signal are respectively used to control the corresponding first motor (12) to drive the swing of the corresponding swing roller (11).

3. The tension control device according to claim 1, characterized in that, The control module (30) is also used to: calculate the absolute value of the difference between the real-time tension corresponding to the pressure roller (100) and the preset standard tension for each pressure roller (100), and calculate the ratio between the absolute value and the preset standard tension, and then use the ratio as the first deviation corresponding to the pressure roller (100).

4. The tension control device according to claim 1, characterized in that, The real-time position is the real-time coordinate value of the corresponding swing roller (11), and the preset standard position is the preset standard coordinate value of the corresponding swing roller (11). The control module (30) is also used to: for each pressure roller (100), calculate the first distance between the real-time coordinate value of the swing roller (11) of the swing roller structure (10) connected to the winding end of the pressure roller (100) and its corresponding preset standard coordinate value, and the second distance between the real-time coordinate value of the swing roller (11) of the swing roller structure (10) connected to the unwinding end of the pressure roller (100) and its corresponding preset standard coordinate value, calculate the second deviation corresponding to the pressure roller (100) based on the first distance and the preset standard coordinate value, and calculate the third deviation corresponding to the pressure roller (100) based on the second distance and the preset standard coordinate value.

5. The tension control device according to claim 1, characterized in that, Each pressure roller (100) is provided with a traction structure (40), which includes an active roller (41) and a driven roller (42) arranged vertically. The active roller (41) is driven to rotate by a second motor (43). The detection module (20) is also used to detect the real-time speed of each second motor (43) and send the detected real-time speed to the control module (30). The control module (30) is also used to: determine the fourth deviation between the real-time speed of each second motor (43) and the preset standard speed; for each pressure roller (100), the working state of the second motor (43) of the pressure roller (100) is controlled based on the preset standard speed and the fourth deviation corresponding to the pressure roller (100).

6. The tension control device according to claim 5, characterized in that, The control module (30) is further configured to: if the fourth deviation corresponding to the pressure roller (100) is not within the preset second deviation range, send a third control signal to the second motor (43) of the pressure roller (100) based on the fourth deviation and the preset standard speed; wherein the third control signal is used to control the corresponding second motor (43) to drive the rotation of the corresponding active roller (41).

7. The tension control device according to claim 1, characterized in that, The swing roller structure (10) also includes a swing arm (13), one end of which is fixedly connected to the output shaft of the first motor (12), and the other end of which is fixedly connected to the rotating shaft of the swing roller (11).

8. The tension control device according to claim 1, characterized in that, The swing roller structure (10) further includes two limiting blocks (14) fixedly arranged along the swing direction of the swing roller (11); the real-time position is located between the two limiting blocks (14) of the corresponding swing roller structure (10).

9. A method for controlling the tension in a roller pressing zone, characterized in that, The tension control method is applied to the tension control device according to any one of claims 1-8, and the tension control method includes: The detection module (20) detects the real-time position of the swing roller (11) and the real-time tension of the electrode at each corresponding station of each pressure roller (100), and sends the detected real-time position and real-time tension to the control module (30). The control module (30) controls the working state of the first motor (12) based on the received real-time position and real-time tension.

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