Unwinding mechanism

Abstract

The utility model provides an unwinding mechanism, and relates to the technical field of lithium electrode segment equipment. The mechanism comprises a first sensor, a second sensor, a winding drum and a motor, a flexible material is wound on the winding drum; the motor is connected with the winding drum, and the motor is configured to drive the winding drum to rotate at a first speed so as to release the flexible material from the winding drum; the first sensor is used for detecting whether the rolling diameter thickness of the flexible material on the winding drum reaches a preset value or not; the second sensor is used for detecting a color code on the flexible material under the condition that the rolling diameter thickness reaches a preset value; and the motor is configured to enter a shutdown process after the second sensor detects the color code. The double sensors can more efficiently and accurately judge the opportunity that the current coil is to be used up and / or the coil is replaced, and the overall production efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of lithium electrode fragmentation equipment technology, and more specifically, to an unwinding mechanism. Background Technology

[0002] In battery production and other modern industrial manufacturing, unwinding mechanisms are a crucial step in achieving continuous production. These mechanisms are responsible for winding continuous material into rolls or flattening rolled material to facilitate subsequent processing, storage, and transportation. However, the winding process requires periodic shutdowns for roll changes, which not only affects the continuity of production but may also lead to material waste and reduced production efficiency.

[0003] In the battery electrode roll production process, controlling the timing of shutdowns is crucial for avoiding material waste, improving production efficiency, and ensuring battery safety. Traditional battery electrode roll production often suffers from material waste, low production efficiency, and inconsistent battery performance due to a lack of precise shutdown control. The timing of shutdowns during roll changing directly affects the quality of battery electrode rolls and the continuity of production, necessitating a reliable shutdown mechanism to ensure production safety. Existing unwinding mechanisms suffer from inefficiencies, material waste, and high labor costs in terms of shutdown-based roll changing. Utility Model Content

[0004] In view of this, the purpose of this application is to provide an unwinding mechanism to improve the problems of low efficiency, material waste and high labor costs in the prior art in terms of downtime for roll changing.

[0005] The mechanism includes: a first sensor, a second sensor, a drum, and a motor; the drum is wound with a flexible material; the motor is connected to the drum and configured to drive the drum to rotate at a first speed to release the flexible material from the drum; the first sensor is used to detect whether the roll diameter thickness of the flexible material on the drum reaches a first preset value; the second sensor is used to detect a color mark on the flexible material when the roll diameter thickness reaches the first preset value; the motor is configured to enter a stop process after the second sensor detects the color mark.

[0006] In the above implementation process, when the unwinding mechanism starts working, the motor drives the drum to rotate at a first speed, releasing the flexible material wound on the drum. A first sensor continuously monitors the thickness of the flexible material on the drum, identifying it before it runs out. Once the first sensor detects that the thickness has reached a first preset value, it indicates that the flexible material is about to run out, requiring a rewind or shutdown. When the thickness reaches the first preset value, a second sensor starts working, detecting color marks on the flexible material. These color marks indicate the preferred location for rewinding or shutdown. When the second sensor detects a color mark, it sends a signal to the motor, which then prepares to enter the shutdown process. By using sensors to assist in controlling the timing of rewinding or shutdown, material waste is reduced, production efficiency is improved, and operational difficulty and safety risks are lowered.

[0007] In one embodiment of this application, the motor gradually decelerates after detecting a color mark until it comes to a complete stop, providing the operator with a safe opportunity to change rolls or stop the machine. After the mechanism has safely stopped, the operator can manually change rolls. Due to the controlled timing of roll changes or stops, the operator can replace the rolls with new ones in time before the material is completely used up, reducing the risk of material waste and production interruptions. After the roll change is completed, the operator can restart the mechanism, and the motor will drive the drum to rotate at the first speed again to continue releasing new rolls of flexible material. The above process is repeated each time a roll change or stop is required.

[0008] Optionally, the first sensor is configured to send a first feedback signal to the motor when the roll diameter thickness reaches a first preset value; wherein the first feedback signal is configured to control the motor to run at a second speed; the second speed is slower than the first speed.

[0009] In the above implementation process, when the first sensor detects that the thickness of the flexible material roll on the roll has reached a first preset value, it sends a first feedback signal to the motor. After receiving the first feedback signal, the motor adjusts its running speed from a first speed to a second speed, where the second speed is slower than the first speed, which can more accurately determine the timing of roll changing or stopping, in order to prepare for roll changing.

[0010] Optionally, the second sensor is configured to send a second feedback signal to the first sensor when the color mark is detected; the second feedback signal is configured to control the first sensor to operate in conjunction with the motor to calculate the remaining length.

[0011] In the above implementation process, when the second sensor detects a color mark on the flexible material, it sends a second feedback signal to the first sensor. After receiving the second feedback signal, the first sensor adjusts its monitoring mode and begins to work with the motor to calculate the remaining length. Through the coordinated work of the sensor and the motor, the remaining material length can be calculated, allowing for timely roll changing or machine shutdown when the material is about to run out, reducing material waste and improving production efficiency.

[0012] Optionally, the first sensor is further configured to control the motor to stop operating when the flexible material has a remaining fixed length.

[0013] In the above implementation process, when the first sensor detects the remaining fixed length of the flexible material, it sends a control signal to the motor, instructing the motor to stop running. After the motor stops, the operator can safely perform the roll-changing operation, because the remaining length of the flexible material is sufficient to ensure that no material waste or production interruption occurs during the roll-changing process.

[0014] Optionally, the first sensor is further configured to send a third feedback signal to the motor when the roll diameter thickness reaches a second preset value; the motor stops running after receiving the third feedback signal.

[0015] In the above implementation process, the first sensor continuously monitors the roll diameter and thickness of the flexible material on the roll, waiting for it to reach a second preset value. Once the roll diameter and thickness reach the second preset value, the first sensor sends a third feedback signal to the motor. Upon receiving the third feedback signal, the motor immediately stops operating, preparing for the roll change operation. Setting the detection of the second preset value as a backup shutdown measurement provides additional safety assurance, allowing the mechanism to stop safely if the main roll change mechanism fails to execute.

[0016] Optionally, the mechanism further includes: a shaft; the shaft is used to fix the drum; the drum is sleeved on the shaft.

[0017] In the above implementation, the mechanism includes a shaft that serves to secure the drum, ensuring its stability during material winding and unwinding. The drum is designed to fit snugly onto the shaft, allowing it to rotate freely while maintaining a fixed position for easy winding and unwinding of flexible materials. This snug fit-on-shaft design simplifies the roll-changing process, making it easier for operators to perform roll-changing operations.

[0018] Optionally, the mechanism further includes a guiding mechanism configured to guide and support the flexible material released from the reel.

[0019] In the above implementation process, the mechanism includes a guiding mechanism configured to guide and support the flexible material released from the reel, so that the material remains stable during release and is released in the correct direction.

[0020] Optionally, the guiding mechanism includes: a first guide roller and a second guide roller; the first guide roller is located near the roll; the first guide roller receives the flexible material released from the roll and guides the flexible material to the second guide roller at a preset angle and direction; the second guide roller is located near the first guide roller and is arranged parallel to the first guide roller; the second guide roller is configured to guide the flexible material away from the second guide roller.

[0021] In the above implementation process, the first guide roller is located near the drum and receives the flexible material released from the drum. The first guide roller guides the flexible material to move at a preset angle and direction, ensuring that the material is correctly guided to the second guide roller. The second guide roller is located near the first guide roller and is arranged parallel to the first guide roller. The second guide roller continues to guide the flexible material, causing it to move away from the second guide roller in a predetermined direction. The combined use of the first and second guide rollers enables the flexible material to move at a preset angle and direction.

[0022] Optionally, the mechanism further includes a splicing platform; the splicing platform is configured to connect the subsequent flexible material to the end of the current flexible material when the flexible material is about to run out.

[0023] In the above implementation process, the splicing platform in the mechanism is used to connect the subsequent flexible material to the end of the current flexible material when the flexible material is about to run out, thereby reducing production interruptions caused by roll changing or machine shutdown.

[0024] Optionally, the flexible material is an electrode roll composed of a battery electrode sheet and a bottom film.

[0025] In the above process, by controlling the roll diameter and thickness and the timing of machine stops or roll changes, it is ensured that each battery electrode roll semi-finished product is fully utilized in the current process. By calculating the remaining material length and changing rolls in a timely manner, material waste is reduced, the material utilization rate of the roll bottom film and electrode sheets is improved, and production costs are reduced. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A simplified schematic diagram of the unwinding mechanism provided in the embodiments of this application;

[0028] Figure 2 A schematic diagram of the unwinding mechanism provided in the embodiments of this application;

[0029] Figure 3 This is a schematic diagram of one embodiment of the unwinding mechanism provided in this application.

[0030] Icons: 10-Drum; 11-Shaft; 20-Motor; 30-First sensor; 40-Second sensor; 50-Guiding mechanism; 51-First guide roller; 52-Second guide roller; 60-Belt receiving platform. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of the embodiments of this application.

[0032] Please see Figure 1 , Figure 1 This is a simplified schematic diagram of the unwinding mechanism provided in an embodiment of this application.

[0033] This application provides an unwinding mechanism, which includes: a first sensor 30, a second sensor 40, a drum 10, and a motor 20; a flexible material is wound on the drum 10; the motor 20 is connected to the drum 10 and is configured to drive the drum 10 to rotate at a first speed to release the flexible material from the drum 10; the first sensor 30 is used to detect whether the roll diameter thickness of the flexible material on the drum 10 reaches a first preset value; the second sensor 40 is used to detect a color mark on the flexible material when the roll diameter thickness reaches the first preset value; the motor 20 is configured to enter a stop process after the second sensor 40 detects the color mark.

[0034] In the above implementation process, when the unwinding mechanism starts working, the motor 20 drives the drum 10 to rotate at a first speed, releasing the flexible material wound on the drum 10. The first sensor 30 continuously monitors the roll diameter thickness of the flexible material on the drum 10, identifying it in time before the material is about to run out. Once the first sensor 30 detects that the roll diameter thickness has reached a first preset value, it indicates that the flexible material is about to run out, requiring roll changing or machine shutdown. When the roll diameter thickness reaches the first preset value, the second sensor 40 starts working, detecting color marks on the flexible material. The color marks are used to indicate the optimal position for roll changing or machine shutdown. When the second sensor 40 detects a color mark, it sends a signal to the motor 20, and the motor 20 begins to prepare for the shutdown process. By using sensors to assist in controlling the timing of roll changing or machine shutdown, material waste is reduced, production efficiency is improved, and operational difficulty and safety risks are reduced. The waveform towards the drum shown in the figure represents the detection of the drum by the first sensor and / or the second sensor.

[0035] In one embodiment of this application, the motor 20 gradually decelerates after detecting a color mark until it comes to a complete stop, providing the operator with a safe opportunity to change rolls or stop the machine. After the mechanism has safely stopped, the operator can manually change rolls. Due to the controlled timing of roll changes or stops, the operator can replace the rolls with new ones in time before the material is completely used up, reducing the risk of material waste and production interruption. After changing rolls or stopping the machine, the operator can restart the mechanism, and the motor 20 will drive the drum 10 to rotate at the first speed again to continue releasing new rolls of flexible material. The above process is repeated each time a roll change or stop is required.

[0036] Optionally, the first sensor 30 is configured to send a first feedback signal to the motor 20 when the roll diameter thickness reaches a first preset value; wherein the first feedback signal is configured to control the motor 20 to run at a second speed; the second speed is slower than the first speed.

[0037] In the above implementation process, when the first sensor 30 detects that the thickness of the flexible material roll on the roll 10 has reached a first preset value, it sends a first feedback signal to the motor 20. After receiving the first feedback signal, the motor 20 adjusts its operating speed from the first speed to a second speed, where the second speed is slower than the first speed, in preparation for roll changing or stopping the machine. After the roll changing or stopping is completed, the operator restarts the mechanism, and the motor 20 drives the roll 10 again at the first speed to continue releasing new flexible material rolls.

[0038] Optionally, the second sensor 40 is configured to send a second feedback signal to the first sensor 30 when a color mark is detected; the second feedback signal is configured to control the first sensor 30 to operate in conjunction with the motor 20 to calculate the remaining length.

[0039] In the above implementation process, when the second sensor 40 detects a color mark on the flexible material, it sends a second feedback signal to the first sensor 30. Upon receiving the second feedback signal, the first sensor 30 adjusts its monitoring mode and begins to work with the motor 20 to calculate the remaining length. Through the coordinated work of the sensor and the motor 20, the remaining material length can be calculated, allowing for timely roll changing or machine shutdown when the material is about to run out. This reduces material waste and improves production efficiency.

[0040] In one embodiment of this application, a correspondence is established between the roll diameter thickness and the actual length of the flexible material on the roll 10. For example, for every reduction in roll diameter thickness, a corresponding reduction of 100 meters of material length is achieved. A first sensor 30 continuously monitors the roll diameter thickness of the flexible material on the roll 10. When the roll diameter thickness is detected to have decreased to the point where 1000 meters of material remain, the first sensor 30 sends a first feedback signal to the motor 20. Upon receiving the first feedback signal, the motor 20 adjusts its operating speed from a first speed to a second speed, which is slower than the first speed, in preparation for stopping the machine. When the roll diameter thickness is reduced to the point where 500 meters of material remain, the second sensor 40 begins detecting color marks on the flexible material, preparing for a stop. After the second sensor 40 detects a color mark, the operator connects the subsequent flexible material to the end of the current material on the splicing platform 60, ensuring that the connection is completed when approximately 50 meters of material remain. Once the connection is complete, the first sensor 30 continues to monitor the roll diameter thickness. When the roll diameter thickness is detected to have decreased to the point where 20 meters of material remain, a third feedback signal is sent to the motor 20, and the motor 20 stops operating, completing the roll change. If the connection fails to be completed when 50 meters of material remain, the first sensor 30 sends a third feedback signal to the motor 20 when the roll diameter and thickness decrease to the corresponding remaining 10 meters of material, triggering a backup shutdown. After the roll change is completed, the operator restarts the mechanism, and the motor 20 drives the roll 10 again at the first speed to continue releasing new rolls of flexible material. The above process is repeated each time a shutdown or roll change is required, ensuring the continuity and efficiency of the entire production process.

[0041] Optionally, the first sensor 30 is also configured to control the motor 20 to stop operating when the flexible material has a remaining fixed length.

[0042] In the above implementation process, when the first sensor 30 detects the remaining fixed length of the flexible material, it sends a control signal to the motor 20, instructing the motor 20 to stop running. After the motor 20 stops, the operator can safely perform the roll-changing operation, because at this time the remaining length of the flexible material is sufficient to ensure that no material waste or production interruption will occur during the roll-changing process.

[0043] Optionally, the first sensor 30 is further configured to send a third feedback signal to the motor 20 when the roll diameter thickness reaches a second preset value; the motor 20 stops running after receiving the third feedback signal.

[0044] In the above implementation process, the first sensor 30 continuously monitors the roll diameter thickness of the flexible material on the roll 10, waiting for it to reach a second preset value. Once the roll diameter thickness reaches the second preset value, the first sensor 30 sends a third feedback signal to the motor 20. Upon receiving the third feedback signal, the motor 20 immediately stops running and may begin preparing for a roll change operation. Setting the detection of the second preset value as a backup shutdown measurement provides additional safety assurance. If the main roll change or shutdown mechanism fails to execute, the mechanism can be safely stopped, reducing unexpected downtime caused by the depletion of flexible material and improving the continuity and efficiency of the production line.

[0045] Specifically, please refer to Figure 2 , Figure 2 This is a schematic diagram of the unwinding mechanism provided in an embodiment of this application.

[0046] Optionally, the mechanism further includes: a shaft 11; the shaft 11 is used to fix the drum 10; the drum 10 is sleeved on the shaft 11.

[0047] In the above implementation, the mechanism includes a shaft 11, which serves to fix the drum 10, ensuring its stability during material winding and unwinding. The drum 10 is designed to fit snugly onto the shaft 11. This structure allows the drum 10 to rotate freely on the shaft 11 while maintaining a fixed position, facilitating the winding and unwinding of flexible materials. The design of the drum 10 fitting snugly onto the shaft 11 simplifies the roll change or shutdown process, making it easier for operators to perform roll change or shutdown operations.

[0048] Optionally, the mechanism also includes a guide mechanism 50 configured to guide and support the release of the flexible material from the reel 10.

[0049] In the above implementation process, the mechanism includes a guiding mechanism 50, which is configured to guide and support the flexible material released from the reel 10, so that the material remains stable during the release process and is released in the correct direction, reducing production problems caused by material deviation or damage.

[0050] Optionally, the guiding mechanism 50 includes: a first guiding roller 51 and a second guiding roller 52; the first guiding roller 51 is located near the drum 10; the first guiding roller 51 receives flexible material released from the drum 10 and guides the flexible material to the second guiding roller 52 at a preset angle and direction; the second guiding roller 52 is located near the first guiding roller 51 and is arranged parallel to the first guiding roller 51; the second guiding roller 52 is configured to guide the flexible material away from the second guiding roller 52.

[0051] In the above implementation process, the first guide roller 51 is located near the drum 10 and receives the flexible material released from the drum 10. The first guide roller 51 guides the flexible material to move at a preset angle and direction, ensuring that the material is correctly guided to the second guide roller 52. The second guide roller 52 is located near the first guide roller 51 and is arranged parallel to the first guide roller 51. The second guide roller 52 continues to guide the flexible material, causing it to move away from the second guide roller 52 in a predetermined direction. The cooperative use of the first guide roller 51 and the second guide roller 52 allows the flexible material to move at a preset angle and direction (i.e., from the drum to the receiving platform). Through the guidance and support of the guide rollers, the risk of damage to the flexible material during release and conveying is reduced.

[0052] Optionally, the mechanism also includes: a splicing platform 60; the splicing platform 60 is configured to connect subsequent flexible materials to the end of the current flexible material when the flexible material is about to run out.

[0053] In the above implementation process, the tape-connecting platform 60 in the mechanism is used to connect the subsequent flexible material to the end of the current flexible material when the flexible material is about to run out, thereby reducing production interruptions caused by roll changing or machine shutdown.

[0054] Alternatively, the flexible material is an electrode roll consisting of a battery electrode sheet and a bottom film.

[0055] In the above process, by controlling the roll diameter and thickness and the timing of machine stoppages or roll changes, it is ensured that each battery electrode roll semi-finished product is fully utilized in the current process, saving 9-12 meters of semi-finished product scrap per roll. By calculating the remaining material length and timely roll changes, material waste is reduced, the material utilization rate of the roll bottom film and electrode sheets is improved, and production costs are reduced.

[0056] In one embodiment of this application, please refer to Figure 3 , Figure 3This is a schematic diagram of one embodiment of the unwinding mechanism provided in this application. During normal operation of the mechanism, in addition to the main roll changing or shutdown mechanism, the first sensor 30 is also configured to monitor the roll diameter thickness when it reaches a second preset value, as a backup shutdown measure. The first sensor 30 continuously monitors the roll diameter thickness of the flexible material on the roll 10, while maintaining monitoring of the first and second preset values. Under normal circumstances, when the first sensor 30 detects that the roll diameter thickness has reached the first preset value, it sends a first feedback signal to the motor 20 according to the main roll changing or shutdown process to adjust the running speed. If the main roll changing or shutdown process fails to execute successfully, or if the roll changing or shutdown is not performed in time for some reason after the flexible material roll diameter thickness reaches the first preset value, the first sensor 30 will continue to monitor until the roll diameter thickness reaches the second preset value. When the roll diameter thickness reaches the second preset value, the first sensor 30 sends a third feedback signal to the motor 20, triggering the backup shutdown measure. After receiving the third feedback signal, the motor 20 immediately stops running, ensuring the safe stopping of the mechanism and reducing material waste and damage to the mechanism.

[0057] Specifically, the mechanism starts operating, with motor 20 driving drum 10 to release flexible material at a first speed. First sensor 30 continuously monitors the roll diameter and thickness of the flexible material on drum 10. When a first preset value is reached, a first feedback signal is sent to motor 20, causing motor 20 to operate at a second speed (slower than the first speed). Second sensor 40 detects color marks on the flexible material when the roll diameter and thickness reach the preset value and sends a second feedback signal to first sensor 30. First sensor 30 then adjusts its monitoring method and calculates the remaining length. Before the flexible material runs out, the operator uses the splicing platform 60 to connect subsequent flexible material to the end of the current material, ensuring production continuity. When second sensor 40 detects a color mark, it sends a second feedback signal to first sensor 30, which then sends a third feedback signal to motor 20. Upon receiving the third feedback signal, motor 20 stops operating, completing the roll change.

[0058] If the main roll changing process fails to execute successfully, when the first sensor 30 detects that the roll diameter thickness has reached the second preset value, it sends a third feedback signal to the motor 20. Upon receiving this signal, the motor 20 stops running and prepares to change the roll. After the motor 20 stops, the operator can perform the roll changing operation, replacing the old flexible material roll with a new material roll, and then restart the mechanism to continue production. The motor 20 then drives the roll 10 again at the first speed to continue releasing new flexible material rolls.

[0059] In one embodiment, the flexible material is an electrode roll composed of a battery electrode sheet and a bottom film.

[0060] In the above implementation process, the bottom film refers to the thin film used for color mark identification and replacement of scrapped electrode sheets during the unwinding process. Its main function is to use the meter-counting stop signal from the color mark sensor to replace the unusable semi-finished electrode sheets between the roll and the take-up platform. Battery electrode sheets are typically composed of active material, conductive agent, binder, and current collector. The active material is responsible for the battery's charging and discharging reactions, the conductive agent improves electron transport efficiency, the binder is used to fix the active material onto the current collector, and the current collector is responsible for transferring current from the active material to the outside of the battery. Therefore, by controlling the roll diameter thickness and the timing of stopping or changing rolls during stop, it is ensured that the semi-finished material in this process is fully utilized. Therefore, the unwinding mechanism provided in this application uses a first sensor to monitor the roll diameter thickness of the flexible material on the roll to determine the remaining amount of material, thereby controlling the timing of stopping. When the first sensor detects that the roll diameter thickness has dropped to a preset value, it sends a signal to the motor, causing the motor to reduce from a first speed to a second speed, preparing for stopping, thereby reducing the risk of electrode sheet breakage and tension failure due to excessively rapid deceleration during stopping, which would affect the production cycle. By calculating the remaining material length and changing rolls in a timely manner, material waste is reduced, the material utilization rate of the bottom film and electrode sheets is improved, and production costs are reduced.

[0061] In summary, the unwinding mechanism provided in this application utilizes a first sensor to monitor the thickness of the flexible material on the roll to determine the remaining material and thus control the shutdown timing. When the first sensor detects that the roll thickness has dropped to a preset value, it sends a signal to the motor, causing the motor to reduce its speed from a first speed to a second speed, preparing for shutdown. The second sensor detects color marks on the flexible material and works in conjunction with the first sensor to determine the optimal roll-changing timing, further controlling the shutdown time. A second preset value is set as a backup shutdown measure; when the roll thickness drops to this value, the first sensor sends a signal to the motor, triggering a safety shutdown to prevent the material from being completely exhausted.

[0062] In the several embodiments provided in this application, it should be understood that the disclosed mechanisms can also be implemented in other ways. The device embodiments described above are merely illustrative; for example, the block diagrams in the accompanying drawings illustrate the possible architecture, functions, and operations of mechanisms according to various embodiments of this application. It should also be noted that each block in the block diagram, and combinations of block diagrams, can be implemented using a dedicated hardware-based system that performs the specified functions or actions, or using a combination of dedicated hardware and computer instructions.

[0063] In addition, the functional modules in the various embodiments of this application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0064] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0065] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. An unwinding mechanism, characterized in that, The mechanism includes: a first sensor, a second sensor, a drum, and a motor; The spool is wound with a flexible material; the motor is connected to the spool and configured to drive the spool to rotate at a first speed to release the flexible material from the spool; The first sensor is used to detect whether the roll diameter thickness of the flexible material on the roll reaches a first preset value; The second sensor is used to detect color marks on the flexible material when the roll diameter thickness reaches a first preset value; The motor is configured to enter a shutdown process after the second sensor detects the color mark.

2. The mechanism according to claim 1, characterized in that, The first sensor is configured to send a first feedback signal to the motor when the roll diameter thickness reaches a first preset value; The first feedback signal is configured to control the motor to run at a second speed, which is slower than the first speed.

3. The mechanism according to claim 1 or 2, characterized in that, The second sensor is configured to send a second feedback signal to the first sensor when the color mark is detected; the second feedback signal is configured to control the first sensor to operate in conjunction with the motor to calculate the remaining length.

4. The mechanism according to claim 3, characterized in that, The first sensor is also configured to control the motor to stop operating when the flexible material has a remaining fixed length.

5. The mechanism according to claim 1, characterized in that, The first sensor is also configured to send a third feedback signal to the motor when the roll diameter thickness reaches a second preset value; the motor stops running after receiving the third feedback signal.

6. The mechanism according to claim 1, characterized in that, The mechanism further includes: a shaft; the shaft is used to fix the drum; the drum is sleeved on the shaft.

7. The mechanism according to claim 1, characterized in that, The mechanism further includes a guiding mechanism configured to guide and support the release of the flexible material from the reel.

8. The mechanism according to claim 7, characterized in that, The guiding mechanism includes: a first guide roller and a second guide roller; The first guide roller is located near the drum; the first guide roller receives the flexible material released from the drum and guides the flexible material to the second guide roller at a preset angle and direction; The second guide roller is located near the first guide roller and is arranged parallel to the first guide roller; the second guide roller is configured to guide the flexible material away from the second guide roller.

9. The mechanism according to claim 1, characterized in that, The mechanism also includes: a receiving platform; The splicing platform is configured to connect the subsequent flexible material to the end of the current flexible material when the flexible material is about to run out.

10. The mechanism according to claim 1, characterized in that, in, The flexible material is an electrode roll composed of battery electrode sheets and a bottom film.

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