Battery core winding equipment, diaphragm deformation monitoring mechanism, and diaphragm deformation monitoring method

Abstract

The present application discloses a battery cell winding device and a diaphragm deformation monitoring mechanism and a diaphragm deformation monitoring method, which relate to the field of battery manufacturing technology. The battery cell winding device includes a winding needle, a first feeding mechanism, a second feeding mechanism, a roller, a diaphragm deformation monitoring mechanism and a processor. The roller is arranged between the second feeding mechanism corresponding to the diaphragm and the winding needle. The outer peripheral surface of the roller is used to abut the diaphragm, and the roller is used to rotate with the movement of the diaphragm. The speed measuring device of the diaphragm deformation monitoring mechanism is used to detect the rotation speed of the roller, and the processor is used to form a diaphragm deformation prompt information according to the current rotation speed and the preset rotation speed of the roller. The battery cell winding device can timely detect the situation that the roller is stuck in rotation, reduce the risk of the inner circle of the wound battery cell being wrinkled due to the deformation of the diaphragm caused by the jamming of the roller, reduce the risk of the cathode and anode sheets overlapping, thereby reducing the risk of local lithium precipitation of the wound battery cell after charging and discharging, thereby reducing the risk of lithium metal piercing the diaphragm and causing internal short circuit.

Description

Technical Field

[0001] The present application relates to the technical field of battery manufacturing, and in particular to a battery cell winding device, a diaphragm deformation monitoring mechanism, and a diaphragm deformation monitoring method. Background Art

[0002] During the use of lithium batteries, the cathode and anode plates included in the battery cells inside the lithium batteries are separated by a diaphragm; however, the cathode and anode plates are close to each other, and there is a risk of accidental short circuit between the cathode and anode plates, which may cause an internal short circuit in the lithium battery. Summary of the invention

[0003] The main purpose of this application is to propose a battery cell winding device, a diaphragm deformation monitoring mechanism, and a diaphragm deformation monitoring method, aiming to reduce the risk of internal short circuit in lithium batteries.

[0004] To achieve the above-mentioned purpose, the battery cell winding equipment proposed in the present application includes a winding needle, a first unloading mechanism, a second unloading mechanism, a roller, a diaphragm deformation monitoring mechanism and a processor, the winding needle is used to wind the electrode sheet and the diaphragm into a wound battery cell, the first unloading mechanism is used to output the electrode sheet to the winding needle, and the second unloading mechanism is used to output the diaphragm to the winding needle; the roller is arranged between the second unloading mechanism and the winding needle, the outer peripheral surface of the roller is used to abut the diaphragm, and the roller is used to rotate with the movement of the diaphragm; the diaphragm deformation monitoring mechanism includes a speed measuring device, the signal output end of the speed measuring device is electrically connected to the signal input end of the processor, the speed measuring device is used to detect the rotation speed of the roller, and the processor is used to form diaphragm deformation prompt information according to the current rotation speed and preset rotation speed of the roller.

[0005] When in use, the battery cell winding equipment proposed in the present application can detect the rotation speed of the roller through a speed measuring device, and form diaphragm deformation prompt information according to the current rotation speed of the roller and the preset rotation speed, thereby facilitating timely detection of the situation where the roller rotation is stuck, reducing the risk of diaphragm deformation caused by roller sticking, thereby reducing the risk of inner circle wrinkling of the wound battery cell caused by deformed diaphragm, reducing the risk of overlap of cathode and anode sheets, thereby reducing the risk of local lithium deposition in the wound battery cell after charging and discharging, thereby reducing the risk of lithium metal piercing the diaphragm and causing internal short circuit.

[0006] Optionally, the roller includes a roller and a support body, the roller is sleeved outside the support body, the roller is rotatably connected to the support body, and the outer peripheral surface of the roller is used to abut the diaphragm; the diaphragm deformation monitoring mechanism also includes a body to be tested, the body to be tested is fixedly connected to the periphery of the roller, and the speed measuring device is used to detect the rotation speed of the body to be tested to form the rotation speed of the roller.

[0007] At this time, the speed measuring device can directly detect the jamming of the roller through the object to be tested which is fixedly connected to the outer periphery of the roller, which is conducive to more timely detection of the jamming of the roller and further reduces the risk of local lithium deposition caused by wrinkling of the inner ring of the wound battery cell.

[0008] Optionally, the speed measuring device includes a signal transmitter and a signal receiver arranged at intervals, and a receiving interval is formed between the signal transmitter and the signal receiver; in the axial direction of the roller, the object to be measured is aligned with the receiving interval, and the object to be measured is used to rotate through the receiving interval.

[0009] At this time, the speed measuring device includes a signal transmitter and a signal receiver arranged at intervals, and an accommodation interval is formed between the signal transmitter and the signal receiver. The object to be measured is used to rotate through the accommodation interval, which is conducive to more rapid detection of the rotation speed of the roller and more timely detection of the jamming of the roller, further reducing the risk of local lithium deposition caused by wrinkling of the inner ring of the wound battery cell.

[0010] Optionally, the object to be tested is set as a code disk, and the code disk is fixedly connected to the outer circumference of the roller; a plurality of penetrating structures are provided on the code disk, and the penetrating structures are arranged at intervals along the circumferential direction of the code disk, and each of the penetrating structures is used to rotate through the accommodating interval.

[0011] At this time, the speed measuring device can make the signal receiver generate different receiving signals through the penetrating structure and the solid part between the penetrating structures, which is conducive to more rapid detection of the rotation speed of the roller and more timely detection of the jamming of the roller, further reducing the risk of local lithium deposition caused by wrinkling of the inner ring of the wound battery cell.

[0012] Optionally, the battery cell winding equipment includes at least two rollers, and the diaphragm deformation monitoring mechanism includes two speed measuring devices; the length direction of the diaphragm is set along the direction toward the winding needle, and the rollers are arranged in sequence along the length direction of the diaphragm; in the length direction of the diaphragm, the two speed measuring devices are used to detect the rotation speed of the two rollers closest to the winding needle; the processor is used to form diaphragm deformation prompt information according to the current rotation speed of the first roller and the preset rotation speed, and / or the processor is used to form diaphragm deformation prompt information according to the current rotation speed of the second roller and the preset rotation speed.

[0013] At this time, due to the presence of a certain rotational resistance inside the roller, the cumulative rotational resistance from the two rollers closest to the winding needle to the winding needle is smaller, the uncertainty of the total value of the cumulative rotational resistance is lower, and the influence of the cumulative rotational resistance on judging whether the roller is stuck is lower; the speed measuring device is used to detect the rotation speed of the two rollers closest to the winding needle, and the processor is used to form diaphragm deformation prompt information according to the current rotation speed and preset rotation speed of the first roller and the current rotation speed and preset rotation speed of the second roller, which is helpful to improve the detection accuracy of roller rotation jam, so as to timely detect roller jam and reduce the risk of wrinkling the inner ring of the wound battery cell, and reduce unnecessary interruptions of the winding process.

[0014] Optionally, the passing roller includes an abutting roller segment, the outer peripheral surface of which is used to abut the diaphragm; for the two passing rollers closest to the winding needle in the length direction of the diaphragm, the ratio of the distance between the central axes of the two passing rollers to the diameter of the abutting roller segment is greater than or equal to 1 and less than or equal to 3.

[0015] At this time, for the two rollers closest to the winding needle in the length direction of the diaphragm, the ratio of the distance between the central axes of the two rollers to the diameter of the abutting roller segment is greater than or equal to 1 and less than or equal to 3, which is beneficial to further improve the detection accuracy of roller rotation jam.

[0016] The present application also proposes a diaphragm deformation monitoring mechanism, which is used for a battery cell winding device, and the battery cell winding device includes a winding needle, a first unwinding mechanism, a second unwinding mechanism and a roller, the winding needle is used to wind the electrode sheet and the diaphragm into a wound battery cell, the first unwinding mechanism is used to output the electrode sheet to the winding needle, and the second unwinding mechanism is used to output the diaphragm to the winding needle, the roller is arranged between the second unwinding mechanism and the winding needle, the outer peripheral surface of the roller is used to abut the diaphragm, and the roller is used to rotate with the movement of the diaphragm; the diaphragm deformation monitoring mechanism includes a speed measuring device, the signal output end of the speed measuring device is used to be electrically connected to the signal input end of the processor, the speed measuring device is used to detect the rotation speed of the roller, and the processor is used to form diaphragm deformation prompt information according to the current rotation speed and preset rotation speed of the roller.

[0017] When in use, the diaphragm deformation monitoring mechanism proposed in the present application can detect the rotation speed of the roller through a speed measuring device, and form diaphragm deformation prompt information according to the current rotation speed and preset rotation speed of the roller, thereby facilitating timely detection of the situation where the roller rotation is stuck, reducing the risk of diaphragm deformation caused by roller sticking, thereby reducing the risk of inner circle wrinkling of wound battery cells caused by deformed diaphragm, reducing the risk of overlap of cathode and anode sheets, thereby reducing the risk of local lithium deposition in wound battery cells after charging and discharging, thereby reducing the risk of lithium metal piercing the diaphragm and causing internal short circuit.

[0018] The present application also proposes a diaphragm deformation monitoring method, the diaphragm deformation monitoring method comprising the following steps:

[0019] Obtaining a rotation speed of a roller, wherein the roller is arranged between a second unwinding mechanism and a winding needle corresponding to the diaphragm, and an outer peripheral surface of the roller is used to abut against the diaphragm;

[0020] Obtaining a preset rotation speed of the roller;

[0021] The diaphragm deformation prompt information is formed according to the current rotation speed of the roller and the preset rotation speed.

[0022] When in use, the diaphragm deformation monitoring method proposed in the present application can obtain the rotation speed of the roller and form diaphragm deformation prompt information according to the current rotation speed and preset rotation speed of the roller, thereby facilitating timely detection of the situation where the roller rotation is stuck, reducing the risk of diaphragm deformation caused by roller sticking, thereby reducing the risk of inner circle wrinkling of wound battery cells caused by deformed diaphragm, reducing the risk of overlap of cathode and anode sheets, thereby reducing the risk of local lithium deposition in wound battery cells after charging and discharging, thereby reducing the risk of lithium metal piercing the diaphragm and causing internal short circuit.

[0023] Optionally, the step of obtaining the rotation speed of the roller includes:

[0024] Acquire the rotational circumference of the object to be measured which is fixedly connected to the outer circumference of the roller;

[0025] Obtaining the rotation time of the object to be tested for one rotation;

[0026] According to the rotation time and the rotation circumference, a linear velocity of the object to be measured is obtained and used as a rotation velocity of the roller;

[0027] The preset rotation speed includes the preset linear speed of the object to be measured by the roller, and the step of obtaining the preset rotation speed of the roller includes:

[0028] Obtaining a preset linear velocity of the object to be measured;

[0029] The step of forming the diaphragm deformation prompt information according to the current rotation speed of the roller and the preset rotation speed comprises:

[0030] The diaphragm deformation prompt information is formed according to the current linear velocity of the object to be measured and the preset linear velocity.

[0031] At this time, according to the rotation time and the rotation circumference, the linear speed of the object to be tested is obtained and used as the rotation speed of the roller, which is conducive to improving the efficiency of obtaining the rotation speed of the roller, and is conducive to more timely detection of the jamming of the roller, and further reducing the risk of local lithium deposition caused by wrinkling of the inner ring of the wound battery cell. In addition, the formation of diaphragm deformation prompt information based on the current linear speed of the object to be tested and the preset linear speed is conducive to more timely detection of changes in the degree of rotation jamming of the roller, which is conducive to more timely detection of the jamming of the roller, and further reducing the risk of local lithium deposition caused by wrinkling of the inner ring of the wound battery cell.

[0032] Optionally, the step of obtaining a preset linear velocity of the object to be measured includes:

[0033] According to the winding speed of the winding needle, a preset linear speed of the object to be measured is obtained;

[0034] The roller includes a contact roller segment, and the outer peripheral surface of the contact roller segment is used to contact the diaphragm; the step of obtaining the preset linear speed of the object to be measured according to the winding speed of the winding needle includes:

[0035] Obtaining the linear velocity of the diaphragm according to the winding angular velocity and the winding radius of the winding needle;

[0036] The preset linear speed is acquired according to the linear speed of the diaphragm, the radius of the abutting roller segment, and the distance from the object to be measured to the central axis of the abutting roller segment.

[0037] At this time, the preset linear speed of the object to be tested is obtained according to the winding speed of the winding needle, which is conducive to making the preset linear speed of the object to be tested dynamically respond to the winding speed of the winding needle, and improving the accuracy of the preset linear speed of the object to be tested, so that the jamming of the roller can be detected in time to reduce the risk of wrinkling the inner ring of the wound battery cell, and the unnecessary interruption of the winding process can be reduced. In addition, the preset linear speed of the object to be tested is obtained according to the linear speed of the diaphragm, the radius of the abutting roller segment, and the distance from the object to be tested to the central axis of the abutting roller segment, which improves the accuracy of the preset linear speed of the object to be tested, so that the jamming of the roller can be detected in time to reduce the risk of wrinkling the inner ring of the wound battery cell, and the unnecessary interruption of the winding process can be reduced.

[0038] Optionally, the step of forming diaphragm deformation prompt information according to the current linear velocity of the object to be measured and the preset linear velocity includes:

[0039] When the ratio of the current linear velocity of the object to be measured to the preset linear velocity is less than 0.8, diaphragm deformation prompt information is generated.

[0040] At this time, when the ratio of the current linear speed of the object to be tested to the preset linear speed is less than 0.8, a diaphragm deformation prompt message is generated, so that the jamming of the roller can be discovered in time to reduce the risk of wrinkling the inner ring of the wound battery cell, and unnecessary interruptions of the winding process can be reduced.

[0041] Optionally, the step of forming diaphragm deformation prompt information according to the current rotation speed of the roller and the preset rotation speed includes:

[0042] Obtaining the winding speed of the winding needle;

[0043] Diaphragm deformation prompt information is formed according to the ratio difference between the ratio of the winding speed to the current rotation speed of the roller and the ratio of the winding speed to the preset rotation speed.

[0044] At this time, according to the ratio difference between the winding speed of the winding needle and the current rotation speed of the roller, and the ratio between the winding speed of the winding needle and the preset rotation speed, the diaphragm deformation prompt information is formed, which is conducive to dynamically responding to the winding speed of the winding needle and improving the accuracy of detecting the rotation jam of the roller.

[0045] Optionally, the step of forming the diaphragm deformation prompt information according to the ratio difference between the ratio of the winding speed to the current rotation speed of the roller and the ratio of the winding speed to the preset rotation speed includes:

[0046] When the difference between the ratio of the winding speed to the current rotation speed of the roller and the ratio of the winding speed to the preset rotation speed is greater than 1.25, diaphragm deformation prompt information is generated.

[0047] At this time, when the difference between the ratio of the winding speed to the current rotation speed of the roller and the ratio of the winding speed to the preset rotation speed is greater than 1.25, a diaphragm deformation prompt message is generated, which can not only timely detect the jamming of the roller and reduce the risk of wrinkling the inner ring of the wound battery cell, but also reduce unnecessary interruptions of the winding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0049] Figure 1 This is a schematic diagram of the use of an embodiment of the battery cell winding device proposed in this application;

[0050] Figure 2 This is a hardware connection diagram of an embodiment of the battery cell winding device proposed in this application;

[0051] Figure 3 A three-dimensional diagram of the partial structure of an embodiment of a battery cell winding device proposed in this application;

[0052] Figure 4 It is a left view of the partial structure of an embodiment of the battery cell winding device proposed in this application;

[0053] Figure 5 A top view of a partial structure of an embodiment of a battery cell winding device proposed in this application;

[0054] Figure 6 A front view of a partial structure of an embodiment of a battery cell winding device proposed in the present application;

[0055] Figure 7 A schematic diagram of the steps of an embodiment of the diaphragm deformation monitoring method proposed in this application;

[0056] Figure 8 This is a schematic diagram of the steps of another embodiment of the diaphragm deformation monitoring method proposed in the present application.

[0057] Description of Figure Numbers:

[0058] 100, winding needle; 101, pole piece; 102, diaphragm;

[0059] 210, first material discharging mechanism; 220, second material discharging mechanism;

[0060] 300, roller; 310, roller;

[0061] 410, speed measuring device; 411, signal transmitter; 412, signal receiver; 413, accommodation interval;

[0062] 420, processor; 430, object to be tested; 431, penetrating structure; 500, display device.

[0063] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0064] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0065] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0066] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0067] During the use of lithium batteries, the cathode and anode plates included in the battery cells inside the lithium batteries are separated by a diaphragm; however, the cathode and anode plates are close to each other, and there is a risk of accidental short circuit between the cathode and anode plates, which may cause an internal short circuit in the lithium battery.

[0068] Therefore, based on the above considerations, in order to reduce the risk of internal short circuits in lithium batteries, the present application proposes a battery cell winding device, a diaphragm deformation monitoring mechanism, and a diaphragm deformation monitoring method. When the battery cell winding device, the diaphragm deformation monitoring mechanism, and the diaphragm deformation monitoring method are used, the situation of the roller rotation jamming can be detected by obtaining the rotation speed of the roller, thereby reducing the risk of inner circle wrinkling of the wound battery cell caused by the deformed diaphragm.

[0069] Next, the battery cell winding device, diaphragm deformation monitoring mechanism, and diaphragm deformation monitoring method proposed in this application are explained with specific implementation methods.

[0070] Reference Figure 1 and Figure 2In one embodiment of the present application, the battery cell winding device includes a winding needle 100, a first unloading mechanism 210, a second unloading mechanism 220, a roller 300, a diaphragm deformation monitoring mechanism and a processor. The winding needle 100 is used to wind the pole piece 101 and the diaphragm 102 into a wound battery cell. The first unloading mechanism 210 is used to output the pole piece 101 to the winding needle 100, and the second unloading mechanism 220 is used to output the diaphragm 102 to the winding needle 100; the roller 300 is arranged between the second unloading mechanism 220 and the winding needle 100, and the outer peripheral surface of the roller 300 is used to abut the diaphragm 102, and the roller 300 is used to rotate with the movement of the diaphragm 102; refer to Figure 2 The diaphragm deformation monitoring mechanism includes a speed measuring device 410 and a processor 420. The signal output end of the speed measuring device 410 is electrically connected to the signal input end of the processor 420. The speed measuring device 410 is used to detect the rotation speed of the roller 300. The processor 420 is used to form diaphragm deformation prompt information according to the current rotation speed and the preset rotation speed of the roller 300.

[0071] Reference Figure 1 , the winding needle 100 may include a first semi-axis and a second semi-axis. The first semi-axis and the second semi-axis may be close to or away from each other in the radial direction, so that the first semi-axis and the second semi-axis support the inside of the wound battery cell by being relatively far away, and the first semi-axis and the second semi-axis release the support for the wound battery cell by being relatively close. When the winding needle 100 releases the support for the wound battery cell, the wound battery cell may be clamped by another clamping needle to facilitate the subsequent shaping process of the wound battery cell. The winding needle 100 rotates around its own axis, for example, along Figure 1 The winding needle 100 is rotated in the direction of the arc arrow in the figure, so that the pole piece 101 and the separator 102 are wound together to form a wound battery cell; it can be understood that the pole piece 101 includes a cathode piece and an anode piece. In addition, the cross-sectional shape of the winding needle 100 itself can be roughly elliptical, circular or diamond-shaped, and the winding needle 100 can be made of aluminum alloy or alloy steel.

[0072] In addition, refer to Figure 1 , the wound battery cell corresponding to the embodiment of the present application can be formed by winding two pole pieces 101 (cathode piece and anode piece) and two diaphragms 102 together. Among them, the diaphragm 102 is used to insulate between the two pole pieces 101 of the cathode piece and the anode piece. Correspondingly, the first unloading mechanism 210 can include unloading mechanisms for outputting the cathode piece and the anode piece respectively, the first unloading mechanism 210 can include a corresponding pole piece unloading shaft, and the second unloading mechanism 220 can include a corresponding diaphragm unloading shaft.

[0073] The roller 300 is used to rotate with the movement of the diaphragm 102 . It can be understood that the roller 300 is a follower mechanism and does not need a driving device such as a motor to provide power for rotation. The roller 300 can rotate only by the traction of the diaphragm 102 .

[0074] The speed measuring device 410 may include a photoelectric sensor, thereby converting the mechanical geometric displacement on the roller 300 into a pulse or digital quantity to achieve speed measurement. Of course, the speed measuring device may also include a magnetic ring and a Hall element, thereby measuring the speed by using the mechanical geometric displacement on the roller 300 through magneto-electric conversion.

[0075] The processor 420 may include at least one of a host computer and a slave device, wherein the host computer may be understood as a computer system with strong computing power and data processing capabilities, and the host computer may be configured to be responsible for monitoring the entire control system, issuing instructions, data acquisition, processing and analysis, and user interaction. The host computer may be configured to process complex algorithms, perform long-term data storage, and provide a graphical interface for user operation. The host computer includes but is not limited to a personal computer, an industrial computer, or a server. The slave device may generally be configured as a device or controller directly connected to hardware such as sensors and actuators in the control system. The slave device may be configured to be responsible for executing specific control instructions issued by the host computer, such as the output of switch signals, the adjustment of analog quantities, the acquisition of data, etc. The slave device generally performs simple logical judgments and real-time control tasks, and the hardware of the slave device generally includes a microcontroller, a PLC (Programmable Logic Controller), an embedded control board, etc.

[0076] Among them, the above-mentioned diaphragm deformation prompt information can be understood as information used to prompt that the diaphragm may be deformed, wherein the diaphragm deformation prompt information can be output through the display device 500. The display device 500 can be understood as a device capable of displaying sound, light, image or video, for example, the display device 500 can be set to a buzzer, a three-color light, a display screen, etc. In some embodiments, the above-mentioned battery cell winding equipment may also include the display device 500. Of course, the battery cell winding equipment may also not include the display device 500, so that any type of external display device already available at the work site can be connected when display is required. Correspondingly, the diaphragm deformation prompt information can be prompt information in the form of sound signals, light signals, image signals, video signals, etc.

[0077] When the battery cell winding device proposed in the present application is in use, it can detect the rotation speed of the roller 300 through the speed measuring device 410, and form a diaphragm deformation prompt information according to the current rotation speed of the roller 300 and the preset rotation speed, so as to help timely discover the situation where the roller 300 is stuck in rotation. For example, if the current rotation speed of the roller 300 is reduced to below the preset rotation speed, it can be indicated that the roller 300 is stuck, thereby reducing the risk of deformation of the diaphragm 102 caused by the sticking of the roller 300, thereby reducing the risk of inner circle wrinkling of the wound battery cell caused by the deformed diaphragm 102, reducing the risk of overlapping of the cathode and anode sheets, thereby reducing the risk of local lithium deposition in the wound battery cell after charging and discharging, thereby reducing the risk of lithium metal piercing the diaphragm 102 and causing internal short circuit.

[0078] In some embodiments, reference Figure 3 , the roller 300 includes a roller 310 and a support body, the roller 310 is sleeved outside the support body, the roller 310 is rotatably connected to the support body, and the outer peripheral surface of the roller 310 is used to abut the diaphragm 102. Among them, the support body may include a support shaft and a bearing sleeved on the support shaft, wherein the outer ring of the bearing can abut the inner wall of the roller 310, so that the roller 310 can rotate under the drive of the diaphragm 102. The battery cell winding equipment may also include an equipment bracket, and the above-mentioned support body may be installed on the equipment bracket. In addition, the above-mentioned winding needle 100, the first unloading mechanism 210, the second unloading mechanism 220, and the speed measuring device 410 may also be installed on the equipment bracket. It can be understood that the equipment bracket can be set as an integrated structure, and the equipment bracket can also be set as a split structure, which is not limited in this embodiment.

[0079] In addition, the diaphragm deformation monitoring mechanism may further include a test body 430, which can be understood as a detection target for speed measurement; the test body 430 is fixedly connected to the periphery of the roller 310, for example, by integral molding, welding, clamping, etc. The test body 430 is fixedly connected to the periphery of the roller 310, so that it rotates with the roller 310; correspondingly, the speed measuring device 410 is used to detect the rotation speed of the test body 430 to form the rotation speed of the roller 300, which can be understood as using the rotation speed of the test body 430 to characterize the rotation speed of the roller 300.

[0080] In this embodiment, the speed measuring device 410 can directly detect the jamming of the roller 310 through the test body 430 fixedly connected to the outer periphery of the roller 310, which is conducive to more timely detection of the jamming of the roller 310 and further reduces the risk of local lithium deposition caused by wrinkling of the inner ring of the wound battery cell.

[0081] In some embodiments, reference Figure 3 and Figure 4The speed measuring device 410 includes a signal transmitter 411 and a signal receiver 412 that are spaced apart, and an accommodation space 413 is formed between the signal transmitter 411 and the signal receiver 412; for example, the signal transmitter 411 and the signal receiver 412 can be respectively set as a photoelectric transmitter and a photoelectric receiver, or respectively set as a laser transmitter and a laser receiver, or respectively set as an infrared transmitter and an infrared receiver.

[0082] In the axial direction of the roller 310, for example Figure 4 In the left and right directions, the object to be tested 430 is aligned with the accommodating interval 413, which can be understood as the object to be tested 430 and the accommodating interval 413 being aligned in the axial direction of the roller 310. The object to be tested 430 is used to rotate through the accommodating interval 413 so that it can be detected by the signal transmitter 411 and the signal receiver 412. In some embodiments, the object to be tested 430 can be set as a code disk, which is fixedly connected to the outer periphery of the roller 310, for example, by welding, interference fit, etc. Of course, the code disk can also be integrally formed with the roller 310, for example, by stamping the end edge of the roller 310 to form the code disk.

[0083] Reference Figure 3 or Figure 6 , a plurality of through structures 431 may be provided on the code disk, and the through structures may be set as through holes or notches; the through structures 431 are arranged at intervals along the circumferential direction of the code disk, which can be understood as being distributed around the code disk; in addition, each through structure 431 is used to rotate through the accommodating interval 413, so that the through structures 431 and the entity parts between the through structures 431 can respectively form different detection signals between the signal transmitter 411 and the signal receiver 412, thereby realizing speed measurement.

[0084] In this embodiment, the speed measuring device 410 includes a signal transmitter 411 and a signal receiver 412 arranged at intervals, and a receiving interval 413 is formed between the signal transmitter 411 and the signal receiver 412. The object to be measured 430 is used to rotate through the receiving interval 413, which is conducive to more quickly detecting the rotation speed of the roller 300, and is conducive to more timely detection of the jamming of the roller 310, further reducing the risk of local lithium deposition caused by wrinkling of the inner ring of the wound battery cell. In addition, the speed measuring device 410 can make the signal receiver 412 generate different receiving signals through the penetrating structure 431 and the solid part between the penetrating structures 431, which is conducive to more quickly detecting the rotation speed of the roller 300, and is conducive to more timely detection of the jamming of the roller 310, and further reducing the risk of local lithium deposition caused by wrinkling of the inner ring of the wound battery cell.

[0085] In some embodiments, reference Figure 1 and Figure 3The cell winding device includes at least two rollers 300, and the membrane deformation monitoring mechanism includes two speed measuring devices 410; the length direction of the membrane 102 is arranged along the direction toward the winding needle 100, and the rollers 300 are arranged in sequence along the length direction of the membrane 102. In the length direction of the membrane 102, it can be understood that in the extension direction of the membrane 102, the two speed measuring devices 410 are used to detect the rotation speed of the two rollers 300 closest to the winding needle 100, for example, to detect Figure 1 The processor 420 is used to generate the diaphragm deformation prompt information according to the current rotation speed and the preset rotation speed of the first roller 300, and / or the processor 420 is used to generate the diaphragm deformation prompt information according to the current rotation speed and the preset rotation speed of the second roller 300.

[0086] In this embodiment, due to the presence of a certain rotational resistance inside the roller 300, the cumulative rotational resistance from the two rollers 300 closest to the winding needle 100 to the winding needle 100 is relatively small, the uncertainty of the total value of the cumulative rotational resistance is lower, and the influence of the cumulative rotational resistance on determining whether the roller 300 is stuck is lower; the speed measuring device 410 is used to detect the rotation speed of the two rollers 300 closest to the winding needle 100, and the processor 420 is used to form diaphragm deformation prompt information according to the current rotation speed and preset rotation speed of the first roller 300 and the current rotation speed and preset rotation speed of the second roller 300, which are respectively beneficial to improve the detection accuracy of the rotation jam of the roller 300, so that the jam of the roller 310 can be discovered in time to reduce the risk of wrinkling the inner ring of the wound battery cell, and unnecessary interruptions of the winding process can be reduced.

[0087] In some embodiments, reference Figure 5 The roller 300 includes a contact roller segment, wherein the contact roller segment can be set as at least a part of the above-mentioned roller 310, and the outer peripheral surface of the contact roller segment is used to abut the diaphragm 102; for the two rollers 300 closest to the winding needle 100 in the length direction of the diaphragm 102, the ratio of the distance L between the central axes of the two rollers 300 and the diameter D of the contact roller segment is greater than or equal to 1 and less than or equal to 3, that is, 1≤L / D≤3, which can be understood as the two rollers 300 are close to each other.

[0088] In this embodiment, for the two rollers 300 closest to the winding needle 100 in the length direction of the diaphragm 102, the ratio of the distance between the central axes of the two rollers 300 and the diameter of the abutting roller segment is greater than or equal to 1 and less than or equal to 3, which is conducive to further improving the detection accuracy of the rotation jam of the roller 300. Further, for the two rollers 300 closest to the winding needle 100 in the length direction of the diaphragm 102, the ratio of the distance between the central axes of the two rollers 300 and the diameter of the abutting roller segment can be greater than or equal to 1.5 and less than or equal to 2.5, which is conducive to further improving the detection accuracy of the rotation jam of the roller 300.

[0089] In addition, the present application also proposes a diaphragm deformation monitoring mechanism, which is used for the above-mentioned battery cell winding equipment. The diaphragm deformation monitoring mechanism includes the above-mentioned speed measuring device 410. The signal output end of the speed measuring device 410 is used to be electrically connected to the signal input end of the processor 420. The speed measuring device 410 is used to detect the rotation speed of the roller 300, and the processor 420 is used to form a diaphragm deformation prompt information according to the current rotation speed and the preset rotation speed of the roller 300.

[0090] When in use, the diaphragm deformation monitoring mechanism proposed in the present application can detect the rotation speed of the roller 300 through the speed measuring device 410, and form diaphragm deformation prompt information according to the current rotation speed and the preset rotation speed of the roller 300, so as to help timely discover the situation that the roller 300 is stuck in rotation, reduce the risk of deformation of the diaphragm 102 caused by the jam of the roller 300, thereby reducing the risk of inner circle wrinkling of the wound battery cell caused by the deformed diaphragm 102, reduce the risk of overlap of the cathode and anode sheets, thereby reducing the risk of local lithium deposition in the wound battery cell after charging and discharging, and thereby reduce the risk of lithium metal piercing the diaphragm 102 and causing internal short circuit.

[0091] In addition, the present application also proposes a diaphragm deformation monitoring method, wherein the diaphragm deformation monitoring method can be applied to the above-mentioned battery winding device or diaphragm deformation monitoring mechanism. Figure 7 , the diaphragm deformation monitoring method comprises the following steps:

[0092] Step S100, obtaining the rotation speed of the roller 300, the roller 300 is used to be arranged between the second unloading mechanism 220 and the winding needle 100 corresponding to the diaphragm 102, and the outer peripheral surface of the roller 300 is used to abut the diaphragm 102; wherein, the rotation speed of the roller 300 can be specifically obtained by the above-mentioned speed measuring device 410.

[0093] Step S200, obtaining a preset rotation speed of the roller 300, which can be obtained by pre-storing in the processor 420, obtaining in real time by the processor 420, or manually inputting by an operator.

[0094] Step S300 , forming diaphragm deformation prompt information according to the current rotation speed and the preset rotation speed of the roller 300 , and the formed diaphragm deformation prompt information can be specifically outputted through the above-mentioned display device 500 .

[0095] When the diaphragm deformation monitoring method proposed in the present application is used, it can obtain the rotation speed of the roller 300, and form diaphragm deformation prompt information according to the current rotation speed and the preset rotation speed of the roller 300, so as to help timely discover the situation that the rotation of the roller 300 is stuck, reduce the risk of deformation of the diaphragm 102 caused by the jam of the roller 300, thereby reducing the risk of inner circle wrinkling of the wound battery cell caused by the deformed diaphragm 102, reduce the risk of overlap of the cathode and anode sheets, thereby reducing the risk of local lithium deposition in the wound battery cell after charging and discharging, and thereby reduce the risk of lithium metal piercing the diaphragm 102 and causing internal short circuit.

[0096] In some embodiments, reference Figure 8 The step of obtaining the rotation speed of the roller 300 (the step S100) includes:

[0097] Step S110, obtaining the rotational circumference of the object to be measured 430 fixedly connected to the outer circumference of the roller 300, which can be obtained by measuring the rotational circumference of the object to be measured 430 in advance, etc.; wherein, the object to be measured 430 can be set as the above-mentioned code disk.

[0098] Step S120, obtaining the rotation time of the object to be tested 430 for one rotation;

[0099] Step S130, according to the rotation time and the rotation circumference, the linear velocity of the object to be measured 430 is obtained and used as the rotation velocity of the roller 300. It can be understood that the linear velocity of the object to be measured 430 is used to characterize the rotation velocity of the roller 300; for example, if the above-mentioned rotation circumference is S1, and the rotation time of the object to be measured 430 for one rotation is T1, then the linear velocity V1 of the object to be measured 430 = S1 / T1.

[0100] The preset rotation speed includes a preset linear speed V0 of the object to be measured 430 passing through the roller 300. The step of obtaining the preset rotation speed of the roller 300 (the above-mentioned step S200) includes:

[0101] Step S210, obtaining a preset linear velocity V0 of the object to be tested 430;

[0102] The step of forming the diaphragm deformation prompt information according to the current rotation speed and the preset rotation speed of the roller 300 (the above-mentioned step S300) includes:

[0103] Step S310 , generating diaphragm deformation prompt information according to the current linear velocity V1 and the preset linear velocity V0 of the object to be tested 430 .

[0104] In this embodiment, according to the rotation time T1 and the rotation circumference S1, the linear velocity V1=S1 / T1 of the object to be tested 430 is obtained and used as the rotation speed of the roller 300, which is conducive to improving the efficiency of obtaining the rotation speed of the roller 300, and is conducive to more timely detection of the jamming of the roller 310, and further reducing the risk of local lithium deposition caused by wrinkling of the inner ring of the wound battery cell. In addition, the formation of diaphragm deformation prompt information based on the current linear velocity V1 of the object to be tested 430 and the preset linear velocity V0 is conducive to more timely detection of changes in the degree of rotation jamming of the roller 300, and is conducive to more timely detection of the jamming of the roller 310, and further reducing the risk of local lithium deposition caused by wrinkling of the inner ring of the wound battery cell.

[0105] In some embodiments, reference Figure 8 The step of obtaining the preset linear velocity of the object to be tested 430 (the above-mentioned step S210) includes:

[0106] According to the winding speed of the winding needle 100, the preset linear speed of the object to be tested 430 is obtained; wherein, the winding speed of the winding needle 100 may be the rotational angular speed Wj of the winding needle 100, and the winding speed of the winding needle 100 may also be the linear speed Vj of the periphery of the wound battery cell on the winding needle 100. It can be understood that, as the diameter of the wound battery cell on the winding needle 100 continues to increase, when the rotational angular speed Wj of the winding needle 100 remains unchanged, the linear speed Vj of the periphery of the wound battery cell continues to increase.

[0107] Specifically, in the case where the roller 300 includes an abutting roller segment, and the outer peripheral surface of the abutting roller segment is used to abut the diaphragm 102, the step of obtaining the preset linear velocity of the object to be measured 430 according to the winding speed of the winding needle 100 may include:

[0108] The linear velocity of the diaphragm 102 is obtained according to the winding angular velocity Wj and the winding radius Rj of the winding needle 100; it can be understood that the linear velocity of the diaphragm 102 can be equal to the linear velocity Vj of the periphery of the wound battery cell, Vj=Wj·Rj.

[0109] The preset linear velocity V0 is obtained according to the linear velocity Vj of the diaphragm 102, the radius Rg of the abutting roller segment, and the distance Rd from the object to be measured 430 to the central axis of the abutting roller segment. It can be understood that since the object to be measured 430 is fixedly connected to the abutting roller segment, the rotational angular velocity of the object to be measured 430 is equal to the rotational angular velocity of the abutting roller segment; and since the diaphragm 102 abuts on the abutting roller segment, the linear velocity of the diaphragm 102 is equal to the linear velocity of the periphery of the abutting roller segment; therefore, Vj / Rg=V0 / Rd, that is, V0= Vj·Rd / Rg.

[0110] In this embodiment, the preset linear speed of the object to be tested 430 is obtained according to the winding speed of the winding needle 100, which is conducive to making the preset linear speed of the object to be tested 430 dynamically respond to the winding speed of the winding needle 100, and improving the accuracy of the preset linear speed of the object to be tested 430, so that the jamming of the roller 310 can be detected in time to reduce the risk of wrinkling the inner ring of the wound battery cell, and the unnecessary interruption of the winding process can be reduced. In addition, the preset linear speed of the object to be tested 430 is obtained according to the linear speed of the diaphragm 102, the radius of the abutting roller segment, and the distance from the object to be tested 430 to the center axis of the abutting roller segment, which improves the accuracy of the preset linear speed of the object to be tested 430, so that the jamming of the roller 310 can be detected in time to reduce the risk of wrinkling the inner ring of the wound battery cell, and the unnecessary interruption of the winding process can be reduced.

[0111] In some embodiments, the step of forming the diaphragm deformation prompt information according to the current linear velocity and the preset linear velocity of the object to be tested 430 (the above-mentioned step S310) includes:

[0112] When the ratio of the current linear velocity V1 of the object to be tested 430 to the preset linear velocity V0 is less than 0.8, a diaphragm deformation prompt message is formed. It can be understood that when the roller 300 is not stuck or the degree of sticking is low, since the roller 300 rotates with the movement of the diaphragm 102, in this case the current linear velocity V1 is equal to the preset linear velocity V0, or the current linear velocity V1 is closer to the preset linear velocity V0. In contrast, when the current linear velocity V1 is smaller than the preset linear velocity V0, it means that the roller 300 is stuck. The stuck roller 300 is likely to hinder the movement of the diaphragm 102 and cause the diaphragm to deform, which is likely to cause the inner ring inside the wound battery cell to form an S-shaped redundancy problem, thereby easily causing the inner ring of the wound battery cell to wrinkle.

[0113] In this embodiment, when the ratio of the current linear velocity V1 of the object to be tested 430 to the preset linear velocity V0 is less than 0.8 (V1 / V0≤0.8), a diaphragm deformation prompt information is generated, so that the jamming of the roller 310 can be discovered in time to reduce the risk of wrinkling the inner ring of the wound battery cell, and unnecessary interruptions of the winding process can be reduced.

[0114] In some embodiments, the step of forming the diaphragm deformation prompt information according to the current rotation speed and the preset rotation speed of the roller 300 (the above-mentioned step S300) includes:

[0115] Obtaining the winding speed of the winding needle 100, for example, obtaining the linear speed Vj of the outer periphery of the winding battery cell;

[0116] The diaphragm deformation prompt information is formed according to the ratio difference between the ratio of the winding speed (for example, the linear speed Vj of the periphery of the above-mentioned wound battery cell) to the current rotational speed of the roller 300 (for example, the above-mentioned current linear speed V1), and the ratio of the winding speed (for example, the linear speed Vj of the periphery of the above-mentioned wound battery cell) to the preset rotational speed (for example, the above-mentioned preset linear speed V0); that is, the diaphragm deformation prompt information is formed according to the ratio difference Vj / V1-Vj / V0.

[0117] In this embodiment, diaphragm deformation prompt information is formed based on the ratio of the winding line speed of the winding needle 100 to the current rotational speed of the roller 300 and the ratio of the winding line speed of the winding needle 100 to the preset rotational speed, which is beneficial to dynamically respond to the winding line speed of the winding needle 100 and improve the accuracy of detecting the rotation jam of the roller 300.

[0118] In some embodiments, the step of forming the diaphragm deformation prompt information according to the ratio of the winding speed to the current rotation speed of the roller 300 and the ratio of the winding speed to the preset rotation speed includes:

[0119] When the difference between the ratio of the winding speed to the current rotation speed of the roller 300 and the ratio of the winding speed to the preset rotation speed is greater than 1.25, the diaphragm deformation prompt information is generated. That is, when Vj / V1-Vj / V0>1.25, the diaphragm deformation prompt information is generated.

[0120] In this embodiment, when the difference between the ratio of the winding speed to the current rotational speed of the roller 300 and the ratio of the winding speed to the preset rotational speed is greater than 1.25, a diaphragm deformation prompt message is generated, so that the jamming of the roller 310 can be detected in time to reduce the risk of wrinkling the inner ring of the wound battery cell, and unnecessary interruptions of the winding process can be reduced.

[0121] Reference Figures 1 to 6In one embodiment, the battery cell winding device includes a winding needle 100, a first unwinding mechanism 210, a second unwinding mechanism 220, a roller 300, a diaphragm deformation monitoring mechanism and a processor 420, wherein the winding needle 100 is used to wind the pole piece 101 and the diaphragm 102 into a wound battery cell; the first unwinding mechanism 210 is used to output the pole piece 101 to the winding needle 100; the second unwinding mechanism 220 is used to output the diaphragm 102 to the winding needle 100; the roller 300 is arranged on the second unwinding mechanism 2 20 and the winding needle 100, the outer peripheral surface of the roller 300 is used to abut the diaphragm 102, and the roller 300 is used to rotate with the movement of the diaphragm 102; the diaphragm deformation monitoring mechanism includes a speed measuring device 410, the signal output end of the speed measuring device 410 is electrically connected to the signal input end of the processor 420, the speed measuring device 410 is used to detect the rotation speed of the roller 300, and the processor 420 is used to form the diaphragm deformation prompt information according to the current rotation speed and the preset rotation speed of the roller 300. The roller 300 includes a roller 310 and a support body, the roller 310 is sleeved outside the support body, the roller 310 is rotatably connected to the support body, and the outer peripheral surface of the roller 310 is used to abut the diaphragm 102; the diaphragm deformation monitoring mechanism also includes a body to be measured 430, the body to be measured 430 is fixedly connected to the outer periphery of the roller 310, and the speed measuring device 410 is used to detect the rotation speed of the body to be measured 430 to form the rotation speed of the roller 300. The speed measuring device 410 includes a signal transmitter 411 and a signal receiver 412, which are arranged at intervals to form a receiving interval 413; in the axial direction of the roller 310, the object to be measured 430 is arranged opposite to the receiving interval 413, and the object to be measured 430 is used to rotate through the receiving interval 413; the object to be measured 430 is set as a code disk, and the code disk is fixedly connected to the outer periphery of the roller 310; a plurality of penetrating structures 431 are provided on the code disk, and the penetrating structures 431 are arranged at intervals along the circumferential direction of the code disk, and each penetrating structure 431 is used to rotate through the receiving interval 413. The cell winding device includes at least two rollers 300, and the diaphragm deformation monitoring mechanism includes two speed measuring devices 410; in the length direction of the diaphragm 102, the two speed measuring devices 410 are used to detect the rotation speed of the two rollers 300 closest to the winding needle 100; the processor 420 is used to form diaphragm deformation prompt information according to the current rotation speed and preset rotation speed of the first roller 300, and / or the processor 420 is used to form diaphragm deformation prompt information according to the current rotation speed and preset rotation speed of the second roller 300. The roller 300 includes a contact roller segment, and the outer peripheral surface of the contact roller segment is used to contact the diaphragm 102; for the two rollers 300 closest to the winding needle 100 in the length direction of the diaphragm 102, the ratio of the distance between the central axes of the two rollers 300 and the diameter of the contact roller segment is greater than or equal to 1 and less than or equal to 3.

[0122] Reference Figure 7 and Figure 8 In one embodiment, the diaphragm deformation monitoring method comprises the following steps:

[0123] Obtaining the rotation speed of the roller 300, the roller 300 is used to be arranged between the second unwinding mechanism 220 and the winding needle 100 corresponding to the diaphragm 102, and the outer peripheral surface of the roller 300 is used to abut against the diaphragm 102;

[0124] Obtaining a preset rotation speed of the roller 300;

[0125] The diaphragm deformation prompt information is generated according to the current rotation speed of the roller 300 and the preset rotation speed.

[0126] The step of obtaining the rotation speed of the roller 300 includes:

[0127] Obtaining the rotational circumference of the object to be measured 430 fixedly connected to the outer circumference of the roller 300;

[0128] Obtaining the rotation time of the object to be tested 430 for one rotation;

[0129] According to the rotation time and the rotation circumference, the linear velocity of the object to be measured 430 is obtained and used as the rotation velocity of the roller 300;

[0130] The preset rotation speed includes the preset linear speed of the object to be measured 430 passing through the roller 300. The step of obtaining the preset rotation speed of the roller 300 includes:

[0131] Obtaining a preset linear velocity of the object to be tested 430;

[0132] The step of forming the diaphragm deformation prompt information according to the current rotation speed and the preset rotation speed of the roller 300 includes:

[0133] The diaphragm deformation prompt information is generated according to the current linear velocity and the preset linear velocity of the object to be measured 430 .

[0134] The step of obtaining the preset linear velocity of the object to be tested 430 includes:

[0135] According to the winding speed of the winding needle 100, the preset linear speed of the object to be tested 430 is obtained;

[0136] The roller 300 includes a contact roller segment, and the outer peripheral surface of the contact roller segment is used to contact the diaphragm 102; according to the winding speed of the winding needle 100, the step of obtaining the preset linear speed of the object to be measured 430 includes:

[0137] According to the winding angular velocity and the winding radius of the winding needle 100, the linear velocity of the diaphragm 102 is obtained;

[0138] The preset linear velocity is obtained according to the linear velocity of the diaphragm 102 , the radius of the abutting roller segment, and the distance from the object to be measured 430 to the central axis of the abutting roller segment.

[0139] The step of forming the diaphragm deformation prompt information according to the current linear velocity and the preset linear velocity of the object to be tested 430 includes:

[0140] When the ratio of the current linear velocity of the object to be measured 430 to the preset linear velocity is less than 0.8, the diaphragm deformation prompt information is generated.

[0141] The step of forming the diaphragm deformation prompt information according to the current rotation speed and the preset rotation speed of the roller 300 includes:

[0142] Obtaining the winding speed of the winding needle 100;

[0143] The diaphragm deformation prompt information is formed according to the difference between the ratio of the winding speed to the current rotation speed of the roller 300 and the ratio of the winding speed to the preset rotation speed.

[0144] The step of forming the diaphragm deformation prompt information according to the ratio of the winding speed to the current rotation speed of the roller 300 and the ratio of the winding speed to the preset rotation speed includes:

[0145] When the difference between the ratio of the winding speed to the current rotation speed of the roller 300 and the ratio of the winding speed to the preset rotation speed is greater than 1.25, the diaphragm deformation prompt information is generated.

[0146] It can be understood that the above-mentioned diaphragm deformation monitoring mechanism and diaphragm deformation monitoring method adopt all the technical solutions of all the embodiments of the above-mentioned battery cell winding equipment, and therefore have at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0147] The above description is only a preferred embodiment of the present application, and does not limit the patent scope of the present application. All equivalent structural changes made by using the contents of the present application specification and drawings under the technical concept of the present application, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A battery cell winding device, characterized in that: The battery cell winding device comprises: A winding needle, which is used to wind the pole piece and the diaphragm into a wound battery cell; a first unloading mechanism, the first unloading mechanism being used to output the pole piece to the winding needle; a second unloading mechanism, the second unloading mechanism being used to deliver the diaphragm to the winding needle; A roller, the roller being arranged between the second unwinding mechanism and the winding needle, the outer peripheral surface of the roller being used to abut against the diaphragm, and the roller being used to rotate with the movement of the diaphragm; A diaphragm deformation monitoring mechanism and a processor, wherein the diaphragm deformation monitoring mechanism comprises a speed measuring device, a signal output end of the speed measuring device is electrically connected to a signal input end of the processor, the speed measuring device is used to detect the rotation speed of the roller, and the processor is used to form diaphragm deformation prompt information according to the current rotation speed of the roller and the preset rotation speed; The battery cell winding equipment includes at least two rollers, and the diaphragm deformation monitoring mechanism includes two speed measuring devices; the length direction of the diaphragm is arranged along the direction toward the winding needle, and the rollers are arranged in sequence along the length direction of the diaphragm; in the length direction of the diaphragm, the two speed measuring devices are used to detect the rotation speed of the two rollers closest to the winding needle; the processor is used to form diaphragm deformation prompt information according to the current rotation speed of the first roller and the preset rotation speed, and / or the processor is used to form diaphragm deformation prompt information according to the current rotation speed of the second roller and the preset rotation speed.

2. The battery cell winding device according to claim 1, characterized in that: The roller comprises a roller and a support body, the roller is sleeved outside the support body, the roller is rotatably connected to the support body, and the outer peripheral surface of the roller is used to abut against the diaphragm; The diaphragm deformation monitoring mechanism further includes a body to be measured, the body to be measured is fixedly connected to the outer periphery of the roller, and the speed measuring device is used to detect the rotation speed of the body to be measured to form the rotation speed of the roller.

3. The battery cell winding device according to claim 2, characterized in that: The speed measuring device comprises a signal transmitter and a signal receiver which are arranged at intervals, and a receiving interval is formed between the signal transmitter and the signal receiver; in the axial direction of the roller, the object to be measured is aligned with the receiving interval, and the object to be measured is used to rotate through the receiving interval.

4. The battery cell winding device according to claim 3, characterized in that: The object to be tested is configured as a code disk, which is fixedly connected to the outer circumference of the roller; a plurality of penetration structures are provided on the code disk, which are arranged at intervals along the circumferential direction of the code disk, and each of the penetration structures is used to rotate through the accommodating interval.

5. The battery cell winding device according to any one of claims 1 to 4, characterized in that: The passing roller includes a contact roller segment, the outer peripheral surface of which is used to abut the diaphragm; for the two passing rollers closest to the winding needle in the length direction of the diaphragm, the ratio of the distance between the central axes of the two passing rollers to the diameter of the contact roller segment is greater than or equal to 1 and less than or equal to 3.

6. A diaphragm deformation monitoring mechanism, characterized in that: The diaphragm deformation monitoring mechanism is used in a battery cell winding device, and the battery cell winding device comprises: A winding needle, which is used to wind the pole piece and the diaphragm into a wound battery cell; a first unloading mechanism, the first unloading mechanism being used to output the pole piece to the winding needle; a second unloading mechanism, the second unloading mechanism being used to deliver the diaphragm to the winding needle; A roller, the roller being arranged between the second unwinding mechanism and the winding needle, the outer peripheral surface of the roller being used to abut against the diaphragm, and the roller being used to rotate with the movement of the diaphragm; The diaphragm deformation monitoring mechanism includes a speed measuring device, a signal output end of the speed measuring device is used to be electrically connected to a signal input end of a processor, the speed measuring device is used to detect the rotation speed of the roller, and the processor is used to form diaphragm deformation prompt information according to the current rotation speed of the roller and the preset rotation speed; The battery cell winding equipment includes at least two rollers, and the diaphragm deformation monitoring mechanism includes two speed measuring devices; the length direction of the diaphragm is arranged along the direction toward the winding needle, and the rollers are arranged in sequence along the length direction of the diaphragm; in the length direction of the diaphragm, the two speed measuring devices are used to detect the rotation speed of the two rollers closest to the winding needle; the processor is used to form diaphragm deformation prompt information according to the current rotation speed of the first roller and the preset rotation speed, and / or the processor is used to form diaphragm deformation prompt information according to the current rotation speed of the second roller and the preset rotation speed.

7. A method for monitoring diaphragm deformation, characterized in that: The diaphragm deformation monitoring method comprises the following steps: Obtaining a rotation speed of a roller, wherein the roller is arranged between a second unwinding mechanism and a winding needle corresponding to the diaphragm, and an outer peripheral surface of the roller is used to abut against the diaphragm; Obtaining a preset rotation speed of the roller; Forming diaphragm deformation prompt information according to the current rotation speed of the roller and the preset rotation speed; In the length direction of the diaphragm, detecting the rotation speeds of the two rollers closest to the winding needle; The diaphragm deformation prompt information is formed according to the current rotation speed of the first roller and the preset rotation speed, and / or the diaphragm deformation prompt information is formed according to the current rotation speed of the second roller and the preset rotation speed.

8. The diaphragm deformation monitoring method according to claim 7, characterized in that: The steps of obtaining the rotation speed of the roller include: Acquire the rotational circumference of the object to be measured which is fixedly connected to the outer circumference of the roller; Obtaining the rotation time of the object to be tested for one rotation; According to the rotation time and the rotation circumference, a linear velocity of the object to be measured is obtained and used as a rotation velocity of the roller; The preset rotation speed includes the preset linear speed of the object to be measured by the roller, and the step of obtaining the preset rotation speed of the roller includes: Obtaining a preset linear velocity of the object to be measured; The step of forming the diaphragm deformation prompt information according to the current rotation speed of the roller and the preset rotation speed comprises: The diaphragm deformation prompt information is formed according to the current linear velocity of the object to be measured and the preset linear velocity.

9. The diaphragm deformation monitoring method according to claim 8, characterized in that: The step of obtaining the preset linear velocity of the object to be measured comprises: According to the winding speed of the winding needle, a preset linear speed of the object to be measured is obtained; The roller includes a contact roller segment, and the outer peripheral surface of the contact roller segment is used to contact the diaphragm; the step of obtaining the preset linear speed of the object to be measured according to the winding speed of the winding needle includes: Obtaining the linear velocity of the diaphragm according to the winding angular velocity and the winding radius of the winding needle; The preset linear speed is acquired according to the linear speed of the diaphragm, the radius of the abutting roller segment, and the distance from the object to be measured to the central axis of the abutting roller segment.

10. The diaphragm deformation monitoring method according to claim 8 or 9, characterized in that: The step of forming diaphragm deformation prompt information according to the current linear velocity of the object to be measured and the preset linear velocity comprises: When the ratio of the current linear velocity of the object to be measured to the preset linear velocity is less than 0.8, diaphragm deformation prompt information is generated.

11. The diaphragm deformation monitoring method according to any one of claims 7 to 9, characterized in that: The step of forming the diaphragm deformation prompt information according to the current rotation speed of the roller and the preset rotation speed comprises: Obtaining the winding speed of the winding needle; Diaphragm deformation prompt information is formed according to the ratio difference between the ratio of the winding speed to the current rotation speed of the roller and the ratio of the winding speed to the preset rotation speed.

12. The diaphragm deformation monitoring method according to claim 11, characterized in that: The step of forming the diaphragm deformation prompt information according to the ratio difference between the ratio of the winding speed to the current rotation speed of the roller and the ratio of the winding speed to the preset rotation speed comprises: When the difference between the ratio of the winding speed to the current rotation speed of the roller and the ratio of the winding speed to the preset rotation speed is greater than 1.25, diaphragm deformation prompt information is generated.

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