Tension control device and method

Abstract

The application provides a tension control device and method, a storage belt mechanism is used for storing an electrode piece with a target length corresponding to a storage belt parameter between a first device and a second device; a detection module is used for detecting the storage belt parameter of the storage belt mechanism and speed parameters and tension parameters of the electrode piece at respective positions of the first device and the second device respectively, and sending the detected storage belt parameter, speed parameter and tension parameter to a control module; the control module is used for adjusting the storage belt parameter of the storage belt mechanism according to the received storage belt parameter, speed parameter and tension parameter. The application can alleviate the problem of uneven tension distribution of the electrode piece when the electrode piece is processed between two adjacent sections in the prior electrode piece manufacturing technology, so as to ensure the processing quality of the electrode piece.

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. Background Technology

[0002] Electrode manufacturing is a crucial component of the overall lithium battery manufacturing process. The main processes include unwinding, coating, drying, rolling, slitting, sheet forming, die-cutting, and rewinding. Each stage in the electrode production process significantly impacts the quality of the produced electrode. Currently, existing electrode manufacturing technologies suffer from uneven tension distribution between adjacent stages, which negatively affects the processing quality of the electrode. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a tension control device and method to alleviate the problem of uneven tension distribution of electrodes when two adjacent sections are processed in the existing electrode manufacturing technology, thereby ensuring the processing quality of the electrodes.

[0004] In a first aspect, embodiments of the present invention provide a tension control device, comprising a tape storage mechanism, a detection module, and a control module; the tape storage mechanism is connected to a first device and a second device of an electrode production equipment, respectively; the detection module is connected to the tape storage mechanism, the first device, the second device, and the control module, respectively; and the control module is connected to the tape storage mechanism; the tape storage mechanism is used to store electrodes of a target length corresponding to its tape storage parameters between the first device and the second device; the detection module is used to detect the tape storage parameters of the tape storage mechanism and the speed and tension parameters of the electrodes at their respective workstations on the first device and the second device, and sends the detected tape storage parameters, speed parameters, and tension parameters to the control module; the control module is used to adjust the tape storage parameters of the tape storage mechanism according to the received tape storage parameters, speed parameters, and tension parameters; wherein, the tape storage parameters represent the size of the corresponding target length.

[0005] In a second aspect, embodiments of the present invention also provide a tension control method, the method being applied to the tension control device described in the second aspect above, the method comprising: the belt storage mechanism storing an electrode sheet of a target length corresponding to its belt storage parameters between the first device and the second device;

[0006] The detection module detects the storage parameters of the storage mechanism and the speed and tension parameters of the electrode at their respective workstations in the first and second devices, and sends the detected storage parameters, speed parameters, and tension parameters to the control module.

[0007] The control module adjusts the storage parameters of the storage mechanism according to the received storage parameters, speed parameters, and tension parameters; wherein the storage parameters represent the size of the corresponding target length.

[0008] This invention provides a tension control device and method. A storage mechanism stores electrodes of a target length corresponding to its storage parameters between a first device and a second device. A detection module detects the storage parameters of the storage mechanism, as well as the speed and tension parameters of the electrodes at their respective workstations in the first and second devices, and sends the detected parameters to a control module. The control module adjusts the storage parameters of the storage mechanism based on the received parameters. Using this technology, the tension of the electrodes during adjacent workstations can be adjusted by combining the storage parameters of the storage mechanism with the speed and tension parameters of the electrodes. This alleviates the problem of uneven tension distribution during adjacent workstations in existing electrode manufacturing technologies, thereby ensuring the processing quality of the electrodes.

[0009] 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.

[0010] 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

[0011] 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.

[0012] Figure 1 This is a schematic diagram of the structure of a tension control device according to an embodiment of the present invention;

[0013] Figure 2 This is a schematic diagram of the belt storage mechanism in an embodiment of the present invention;

[0014] Figure 3 This is a schematic diagram of the structure of the translation roller assembly and the swing roller assembly in an embodiment of the present invention;

[0015] Figure 4 This is a schematic flowchart of a tension control method according to an embodiment of the present invention.

[0016] Icons: 10-Belt storage mechanism; 20-Detection module; 30-Control module; 40-First device; 50-Second device; 11-Transfer roller assembly; 111-Transfer roller; 112-Fixed roller; 12-Swing roller assembly; 121-Swing 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, existing electrode manufacturing technologies suffer from uneven tension distribution when two adjacent processing steps are performed, which affects the processing quality of the electrode. Therefore, this invention provides a tension control device and method that can alleviate the problem of uneven tension distribution when two adjacent processing steps are performed in existing electrode manufacturing technologies, thereby ensuring the processing quality of the electrode.

[0019] To facilitate understanding of this embodiment, a tension control device disclosed in this invention will first be described in detail, see [link to relevant documentation]. Figure 1 As shown, the tension control device may include a storage mechanism 10, a detection module 20, and a control module 30. The storage mechanism 10 is connected to the first device 40 and the second device 50 of the electrode production equipment, respectively. The detection module 20 is connected to the storage mechanism 10, the first device 40, the second device 50, and the control module 30, respectively. The control module 30 is connected to the storage mechanism 10. The storage mechanism 10 can be used to store electrodes of the target length corresponding to its storage parameters between the first device 40 and the second device 50. The detection module 20 can be used to detect the storage parameters of the storage mechanism 10, as well as the speed parameters and tension parameters of the electrodes at their respective workstations in the first device 40 and the second device 50, and send the detected storage parameters, speed parameters, and tension parameters to the control module 30. The control module 30 can be used to adjust the storage parameters of the storage mechanism 10 according to the received storage parameters, speed parameters, and tension parameters.

[0020] In this configuration, the section corresponding to the first device 40 is adjacent to the section corresponding to the second device 50, and the section corresponding to the first device 40 is performed before the section corresponding to the second device 50. For example, the first device 40 may be a drying device, and the second device 50 may be a rolling device; or, for another example, the first device 40 may be a rolling device, and the second device 50 may be a slitting device. The specific devices 40 and 50 can be determined according to actual needs and are not limited thereto. The above storage belt parameters can characterize the size of the corresponding target length.

[0021] The tension control device provided in this invention can adjust the tension of the electrode when two adjacent sections are processed by combining the storage parameters of the storage mechanism with the speed and tension parameters of the electrode. This can alleviate the problem of uneven tension distribution of the electrode when two adjacent sections are processed in the existing electrode manufacturing technology, thereby ensuring the processing quality of the electrode.

[0022] As one possible implementation method, see Figure 2 and Figure 3 As shown, the belt storage mechanism may include a translation roller assembly 11 and a swing roller assembly 12 connected in sequence; the translation roller assembly 11 may include a plurality of translation rollers 111 arranged in parallel on the same horizontal plane (i.e., horizontal plane A) and a plurality of fixed rollers 112 arranged in parallel on the same horizontal plane (i.e., horizontal plane B), wherein the horizontal plane on which the translation rollers 111 are located is different from the horizontal plane on which the fixed rollers 112 are located; the swing roller assembly 12 may include a swing roller 121 that can be swinged, and the swing roller assembly 12 may adjust the swing position of the swing roller 121 by the electrode tension and the weight of the swing roller 121 itself.

[0023] See Figures 1 to 3 As shown, the belt storage parameters may include the distance L between the horizontal plane where the translation roller 111 is located (i.e., horizontal plane A) and the horizontal plane where the fixed roller is located (i.e., horizontal plane B); the tension control device may also include a belt storage motor connected to the control module 30; based on this, the control module 30 may also be used to control the belt storage motor to drive the translation roller 111 to move in the vertical direction based on the preset distance L0 and preset speed V0 and the received distance L, speed parameters and tension parameters, so as to adjust the distance between the horizontal plane where the translation roller 111 is located and the horizontal plane where the fixed roller 112 is located.

[0024] For example, the control module 30 may perform the following operations: compare a preset distance L0 with a received distance L to obtain a first comparison result, compare a preset speed V0 with a received speed parameter to obtain a second comparison result, and control the storage belt motor to drive the translation roller 111 to move in the vertical direction based on the first comparison result, the second comparison result, and the received tension parameter.

[0025] Specifically, the preset spacing L0, preset speed V0, and preset tension F0 can be stored in the control module 30 in advance. After the control module 30 receives the spacing L between the horizontal plane where the translation roller 111 is located (i.e., horizontal plane A) and the horizontal plane where the fixed roller is located (i.e., horizontal plane B) detected by the detection module 20, as well as the speed parameters and tension parameters of the electrode at their respective workstations in the first device 40 and the second device 50, the control module 30 can perform the following operations: calculate the first deviation between the preset spacing L0 and the received spacing L; if the first deviation is greater than the first preset deviation, send a first control signal to the storage motor; calculate the second deviation between the preset speed V0 and the received speed parameter; if the second deviation is greater than the second preset deviation, send a second control signal to the storage motor; calculate the third deviation between the preset tension F0 and each received tension parameter; if the third deviation is greater than the third preset deviation, send a third control signal to the storage motor; wherein, the first control signal, the second control signal, and the third control signal are all used to control the storage motor to drive the translation roller 111 to move in the vertical direction. Using this operating method, the control module 30 can drive and control the translation roller 111 using the pre-stored data and the data detected by the detection module 20. Then, by adjusting the distance L between the translation roller 111 and the fixed roller 112 and combining the autonomous swing of the swing roller 121, the length of the electrode stored in the belt storage mechanism 10 can be adjusted, thereby adjusting the tension of the electrode when performing two adjacent sections.

[0026] As an example, the control module 30 can calculate the first deviation, the second deviation, and the third deviation in the following ways: Calculate the absolute value of the difference between the preset spacing L0 and the received spacing L (i.e., |L0-L|), and calculate the ratio of this absolute value to the preset spacing (i.e., |L0-L|÷L0), then use this ratio as the first deviation; calculate the absolute value of the difference between the received speed parameters (i.e., |V1-V2|, where V1 and V2 are the speed parameters of the electrode at their respective workstations in the first device 40 and the second device 50), and calculate the ratio of this absolute value to the preset speed V0 (i.e., |V1-V2|÷V0), then use this ratio as the second deviation; calculate the absolute value of the difference between each received tension parameter and the preset tension F0, and calculate the ratio of this absolute value to the preset tension F0, then use this ratio as the third deviation.

[0027] As one possible implementation method, see Figures 1 to 3 As shown, the control module 30 can also be used to: if the second deviation is greater than the second preset deviation, calculate the absolute value of the difference between the received speed parameters (i.e., |V1-V2|), and determine the magnitude of the vertical movement speed of the translation roller 111 based on the absolute value, and then generate a second control signal based on the magnitude of the movement speed.

[0028] For example, after the control module 30 receives the speed parameters (i.e., V1 and V2) of the electrode at the corresponding workstations of the first device 40 and the second device 50, the control module 30 can perform the following operations: calculate a second deviation using V1, V2, and V0; determine whether the second deviation is greater than a second preset deviation; if the second deviation is greater than the second preset deviation, calculate |V1-V2| using V1, V2, and a preset constant coefficient n, and then calculate the vertical moving speed of the translation roller 111, V3 = n × |V1-V2|. Then, use V3 to generate a control signal as a second control signal and send it to the storage motor to control the storage motor, which, upon receiving the second control signal, drives the translation roller 111 to move vertically according to the calculated moving speed V3. This operation method can further control the moving speed of the translation roller 111 based on the control of its movement, improving the stability of the translation roller 111 movement control, thereby helping to avoid the instability of the translation roller 111's moving speed affecting the electrode production quality.

[0029] As one possible implementation method, see Figures 1 to 3 As shown, the first device 40 and the second device 50 each have a corresponding traction motor, and each traction motor is used to traction the electrode sheet forward; based on this, the speed parameters mentioned above may include the rotational speed of the traction motors corresponding to the first device 40 and the second device 50 respectively.

[0030] As one possible implementation method, see Figures 1 to 3 As shown, the detection module 20 may include: a first sensor disposed on the belt storage mechanism 10, second sensors disposed on the traction motors corresponding to the first device 40 and the second device 50 respectively, and third sensors corresponding to the first device 40 and the second device 50 respectively; the first sensor can be used to detect the distance between the horizontal plane where the translation roller 111 is located and the horizontal plane where the fixed roller 112 is located, each second sensor can be used to detect the rotational speed of the corresponding traction motor, and each third sensor can be used to detect the tension parameter of the electrode sheet at the corresponding work station.

[0031] In practical applications, the first sensor can be a linear sensor, the second sensor can be a speed sensor, and the third sensor can be a tension sensor.

[0032] To facilitate understanding, the working principle of the above-mentioned tension control device is described exemplarily below using a specific application as an example.

[0033] See Figures 1 to 3As shown, a tape storage mechanism 10 is provided between the first device 40 and the second device 50 of the electrode production equipment. The tape storage mechanism includes a translation roller assembly 11 and a swing roller assembly 12 connected in sequence. The translation roller assembly 11 includes multiple translation rollers 111 arranged parallel to each other on horizontal plane A and multiple fixed rollers 112 arranged parallel to each other on horizontal plane B. The fixed rollers 112 are kept in a fixed position. The translation rollers 111 are driven to move vertically as a whole by a push rod motor (i.e., the tape storage motor at this time). The swing roller assembly 12 includes a swing roller 121 that can swing within a certain angle range. A linear sensor is provided on the tape storage mechanism to... The distance L between horizontal plane A and horizontal plane B is detected; each of the first device 40 and the second device 50 is equipped with a speed sensor on its corresponding traction motor, and each speed sensor is used to detect the speed of the corresponding traction motor; each of the first device 40 and the second device 50 is equipped with a tension sensor at its corresponding workstation, and each tension sensor is used to detect the tension of the electrode at the corresponding workstation; the linear sensor, each speed sensor and each tension sensor are all connected to the PLC controller (belonging to the control module 30); each of the first device 40 and the second device 50 has a corresponding traction motor for traction of the electrode forward.

[0034] See Figures 1 to 3 As shown, during electrode production, the electrode is transported forward under the traction of a traction motor. The electrode enters the storage mechanism from the first device 40. In the storage mechanism 10, the electrode passes alternately through the fixed roller 112, the translation roller 111, the fixed roller 112, ..., the translation roller 111 and the swing roller 121. After leaving the storage mechanism 10, the electrode enters the second device 50. During this transportation process, a linear sensor detects the distance L between horizontal plane A and horizontal plane B and sends the distance L to the PLC controller. A speed sensor detects the speed of the traction motor corresponding to the first device 40 and the second device 50 and sends the detected speed to the PLC controller. A tension sensor detects the tension of the electrode at the corresponding workstation of the first device 40 and the second device 50 and sends the detected tension to the PLC controller.

[0035] After receiving the real-time detected spacing L, the PLC controller performs the following operations: compares L with the preset spacing L0 in real time. If (L0-L)÷L0>10%, a first control signal is sent to the push rod motor. This first control signal controls the push rod motor to drive the translation roller 111 as a whole to move vertically away from the fixed roller 112, thereby increasing the actual length of the electrode stored in the tape storage mechanism 10. If |L0-L|÷L0<10%, the first control signal is not sent to the push rod motor, thereby keeping the actual length of the electrode stored in the tape storage mechanism 10 unchanged. If (L-L0)÷L0>10%, a first control signal is sent to the push rod motor. This first control signal controls the push rod motor to drive the translation roller 111 as a whole to move vertically towards the fixed roller 112, thereby decreasing the actual length of the electrode stored in the tape storage mechanism 10.

[0036] After receiving the real-time detected rotational speeds (V1 and V2), the PLC controller performs the following operations: It compares in real-time the rotational speed V1 of the traction motor corresponding to the winding end of the tape storage mechanism 10 with the rotational speed V2 of the traction motor corresponding to the unwinding end of the tape storage mechanism 10; if (V1-V2)÷V>10%, it calculates the moving speed of the push rod motor, V3=n*│V1-V2│, and generates a second control signal using V3. This second control signal is then sent to the push rod motor. This second control signal controls the push rod motor to drive the translation roller 111 as a whole to move vertically away from the fixed roller 112 according to V3, so that the tape storage mechanism 10... The actual length of the stored electrode increases; if |V1-V2|÷V0<10%, then no second control signal is sent to the push rod motor, so that the actual length of the stored electrode in the tape storage mechanism 10 remains unchanged; if (V2-V1)÷V>10%, then the moving speed of the push rod motor V3=n*|V1-V2| is calculated, and a second control signal is generated using V3. Then, the second control signal is sent to the push rod motor. The second control signal is used to control the push rod motor to drive the translation roller 111 as a whole to move vertically in the direction of V3 toward the direction closer to the fixed roller 112 so that the actual length of the stored electrode in the tape storage mechanism 10 decreases.

[0037] After receiving the real-time detected tension (denoted as F) of the electrode sheet at any station, the PLC controller performs the following operations: compares F with the preset tension F0 in real time; if |F0-F|≠0, it performs calculations through PID control instructions and generates a third control signal based on the calculation result, and then sends the third control signal to the push rod motor. The second control signal is used to control the push rod motor to drive the translation roller 111 to move vertically as a whole so that the actual length of the electrode sheet stored in the tape storage mechanism 10 increases or decreases; if |F0-F|=0, it does not send the third control signal to the push rod motor, so that the actual length of the electrode sheet stored in the tape storage mechanism 10 remains unchanged.

[0038] In practical applications, taking either the first device 40 or the second device 50 as an example of a roller pressing device, see [reference needed]. Figures 1 to 3 As shown, since the rolling of the roller pressing equipment acts as a barrier to the tension of the electrode sheet before and after the rolling position, if the roller pressing equipment stops rolling, this barrier will disappear, resulting in unstable electrode sheet tension. In order to ensure that the electrode sheet maintains stable tension when the roller pressing equipment stops, an intermediate roller with an unchanged position can be additionally installed inside the belt storage mechanism 10, and the rotation of the intermediate roller is driven by a motor connected to the PLC controller. If the roller pressing equipment stops, the PLC controller can send a control signal to the motor to control the motor to drive the rotation of the intermediate roller, thereby further improving the stability of electrode sheet tension control.

[0039] By using the aforementioned tension control device, the tension of the electrode sheet can be comprehensively adjusted when two adjacent sections are processed using real-time detected storage parameters, speed parameters, and tension parameters. This alleviates the problem of uneven tension distribution when two adjacent sections are processed in existing electrode manufacturing technology, and helps to improve the processing quality of the electrode sheet.

[0040] Based on the above-described tension control device, this embodiment of the invention also provides a tension control method, which can be applied to the above-described tension control device. See [link to relevant documentation]. Figure 4 As shown, the method may include the following steps:

[0041] In step S402, the storage mechanism stores the electrode sheet of the target length corresponding to its storage parameters between the first device and the second device.

[0042] In step S404, the detection module detects the storage parameters of the storage mechanism and the speed and tension parameters of the electrode at the corresponding workstations of the first and second devices, and sends the detected storage parameters, speed parameters and tension parameters to the control module.

[0043] Step S406: The control module adjusts the storage parameters of the storage mechanism according to the received storage parameters, speed parameters, and tension parameters; wherein, the storage parameters represent the size of the corresponding target length.

[0044] 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 method embodiment.

[0045] 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.

[0046] 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 this invention, essentially, 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 methods described in the various embodiments of this 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.

[0047] 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.

[0048] 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, characterized in that, The tension control device includes a belt storage mechanism (10), a detection module (20), and a control module (30); the belt storage mechanism (10) is connected to the first device (40) and the second device (50) of the electrode production equipment, respectively; the detection module (20) is connected to the belt storage mechanism (10), the first device (40), the second device (50), and the control module (30), respectively; the control module (30) is connected to the belt storage mechanism (10); the belt storage mechanism (10) is used to store electrodes of the target length corresponding to its belt storage parameters in the first device (40). 40) and the second device (50); the detection module (20) is used to detect the storage parameters of the storage mechanism (10) and the speed and tension parameters of the electrode at the corresponding workstations of the first device (40) and the second device (50), and send the detected storage parameters, speed parameters and tension parameters to the control module (30); the control module (30) is used to adjust the storage parameters of the storage mechanism (10) according to the received storage parameters, speed parameters and tension parameters; wherein, the storage parameters represent the size of the corresponding target length; The belt storage mechanism (10) includes a translation roller assembly (11) and a swing roller assembly (12) connected in sequence; the translation roller assembly (11) includes a plurality of translation rollers (111) arranged in parallel on the same horizontal plane and a plurality of fixed rollers (112) arranged in parallel on the same horizontal plane, the horizontal plane where the translation rollers (111) are located is different from the horizontal plane where the fixed rollers (112) are located; the swing roller assembly (12) includes a swing roller (121) that can be swinged, and the swing roller assembly (12) adjusts the swing position of the swing roller by the electrode tension and the weight of the swing roller (121); The storage parameters include the distance between the horizontal plane where the translation roller (111) is located and the horizontal plane where the fixed roller (112) is located; the tension control device also includes a storage motor connected to the control module (30); the control module (30) is also used to control the storage motor to drive the translation roller (111) to move in the vertical direction based on the preset distance and preset speed and the received distance, speed parameters and tension parameters, so as to adjust the distance between the horizontal plane where the translation roller (111) is located and the horizontal plane where the fixed roller (112) is located; The control module (30) is also used to: compare the preset spacing with the received spacing to obtain a first comparison result, compare the preset speed with the received speed parameter to obtain a second comparison result, and control the storage belt motor to drive the translation roller (111) to move in the vertical direction based on the first comparison result, the second comparison result and the received tension parameter.

2. The tension control device according to claim 1, characterized in that, The control module (30) is also used to: calculate the first deviation between the preset spacing and the received spacing; if the first deviation is greater than the first preset deviation, send a first control signal to the storage belt motor. Calculate the second deviation between the preset speed and the received speed parameter; if the second deviation is greater than the second preset deviation, send a second control signal to the belt storage motor. Calculate the third deviation between the preset tension and each received tension parameter. If the third deviation is greater than the third preset deviation, send a third control signal to the storage motor. The first control signal, the second control signal and the third control signal are all used to control the storage motor to drive the translation roller (111) to move in the vertical direction.

3. The tension control device according to claim 2, characterized in that, The control module (30) is further configured to: calculate the absolute value of the difference between the preset spacing and the received spacing, and calculate the ratio between the absolute value and the preset spacing, and then use the ratio as the first deviation; calculate the absolute value of the difference between the received speed parameters, and calculate the ratio between the absolute value and the preset speed, and then use the ratio as the second deviation; calculate the absolute value of the difference between each received tension parameter and the preset tension, and calculate the ratio between the absolute value and the preset tension, and then use the ratio as the third deviation.

4. The tension control device according to claim 2, characterized in that, The control module (30) is further configured to: if the second deviation is greater than the second preset deviation, calculate the absolute value of the difference between the received speed parameters, and determine the magnitude of the vertical movement speed of the translation roller (111) based on the absolute value, and then generate the second control signal based on the magnitude of the movement speed.

5. The tension control device according to claim 1, characterized in that, The first device (40) and the second device (50) each have a corresponding traction motor, and each traction motor is used to traction the electrode sheet forward; the speed parameter includes the rotational speed of the traction motor corresponding to the first device (40) and the second device (50).

6. The tension control device according to claim 5, characterized in that, The detection module (20) includes: a first sensor disposed on the belt storage mechanism (10), a second sensor disposed on the traction motor corresponding to the first device (40) and the second device (50) respectively, and a third sensor corresponding to the first device (40) and the second device (50) respectively; the first sensor is used to detect the distance between the horizontal plane where the translation roller (111) is located and the horizontal plane where the fixed roller (112) is located, each second sensor is used to detect the rotation speed of the corresponding traction motor, and each third sensor is used to detect the tension parameter of the electrode at the corresponding work station.

7. A tension control method, characterized in that, The method is applied to the tension control device according to any one of claims 1-5, and the method comprises: The storage mechanism (10) stores the electrode sheets of the target length corresponding to its storage parameters between the first device (40) and the second device (50); The detection module (20) detects the storage parameters of the storage mechanism (10) and the speed and tension parameters of the electrode at the corresponding work stations of the first device (40) and the second device (50), and sends the detected storage parameters, speed parameters and tension parameters to the control module (30). The control module (30) adjusts the storage parameters of the storage mechanism (10) according to the received storage parameters, speed parameters and tension parameters; wherein the storage parameters represent the size of the corresponding target length.

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