Slitting system for battery diaphragm

Abstract

The invention discloses a slitting system for a battery diaphragm, and relates to the technical field of battery diaphragms. Comprising a mechanical execution unit, a detection unit and a control unit. The mechanical execution unit comprises a winding module, the winding module comprises at least one winding roller, and each winding roller is used for winding the cut sub-roll battery diaphragm; the detection units are arranged on the winding rollers and used for detecting whether the sub-roll battery diaphragms exist on the winding rollers or not when the winding rollers start to wind the sub-roll battery diaphragms so as to correspondingly generate detection signals; the control unit is connected to the detection unit and used for obtaining detection signals of the winding rollers, and when the detection signals of the winding rollers are larger than or equal to a first preset value, the winding rollers are controlled to wind the sub-roll battery diaphragms; and when the detection signal of any winding roller is smaller than a first preset value, the corresponding winding roller is controlled to stop winding.

Description

Technical Field

[0001] The present invention relates to the technical field of battery separators, and in particular to a battery separator slitting system. Background Art

[0002] Lithium-ion battery separators are crucial functional materials in battery manufacturing, separating the positive and negative electrodes and ensuring the free migration of lithium ions. In current industrial production, separators are typically manufactured in large rolls and then slitting into smaller rolls that meet battery specifications. The stability and precision of the slitting process have a decisive impact on the final separator quality.

[0003] In actual production, slitting equipment often faces quality issues such as wrinkles and diagonal lines (also known as "slant cracks") on the film surface during the winding stage. These undesirable phenomena not only affect the consistency of product appearance, but also pose potential risks to the performance of the diaphragm.

[0004] Through on-site problem reproduction and continuous optimization practice, it was found that the factors leading to winding skew include but are not limited to: poor fitting of the bottom of the core tube: the initial film is not close to the bottom of the core, which easily causes uneven initial tension and causes the film surface to deviate; the winding shaft is not correctly installed: the axis is not fully inserted or the positioning is offset, causing the film material to be wound skewed; the mold path is misaligned: the film material winding order is wrong or does not pass through the key guide roller, affecting the operation stability; insufficient parallelism of the slitting and sliding axis: the slitting and sliding reels on both sides are not on the same horizontal plane, resulting in uneven tension distribution; improper setting of the arc roller: the flattening effect is not good, so that the stress on the film surface is not fully released; the incoming material itself has skew: the raw material already has slight twill defects, which are further magnified after slitting; insufficient or unstable tension control: the winding tension is too small or fluctuates frequently, and the film surface cannot be maintained stable; abnormal slitting traction speed ratio: the speed ratio setting is unreasonable or the feedback control is delayed, resulting in film slippage or sudden tension changes.

[0005] The interaction of the above factors often superimposes and amplifies membrane surface defects. Summary of the Invention

[0006] The main technical problem solved by the present invention is to solve the problem of slanting when the battery diaphragm slitting system is not properly moved and the battery diaphragm is rolled up, which is easy to occur.

[0007] According to the first aspect, an embodiment provides a battery separator slitting system, comprising:

[0008] A mechanical execution unit, the mechanical execution unit including a winding module, the winding module including at least one winding roller, using each winding roller to wind up the slit sub-roll battery separator;

[0009] A detection unit, the detection unit being provided on each winding roller and configured to detect whether a sub-roll of battery separator film is present on each winding roller when the winding roller begins to wind the sub-roll of battery separator film, so as to generate a corresponding detection signal;

[0010] A control unit is connected to the detection unit and is used to obtain the detection signal of each winding roller. When the detection signal of each winding roller is greater than or equal to a first preset value, each winding roller is controlled to rewind the sub-roll battery diaphragm; when the detection signal of any winding roller is less than the first preset value, the corresponding winding roller is controlled to pause rewinding.

[0011] In one embodiment, the control unit also obtains the position information of each winding roller and detects the position information of each winding roller. When the position information of each winding roller reaches a first preset position, each winding roller is controlled to rewind the sub-roll battery diaphragm; when the position information of any winding roller does not reach the first preset position, the corresponding winding roller is controlled to pause rewinding.

[0012] In one embodiment, the battery separator slitting system further includes a human-computer interaction unit, and the human-computer interaction unit includes a forward control or a backward control;

[0013] When the position information of each winding roller reaches a first preset position, in response to the user's operation of the forward control or the backward control on the human-computer interaction unit, the control unit controls each winding roller to move forward or backward according to the forward control or the backward control.

[0014] In one embodiment, when the control unit detects that the position information of any winding roller has not reached the first preset position, the human-computer interaction unit prompts that the position has not been reached.

[0015] In one embodiment, the winding rollers are covered on the outside of the winding shaft, and the control unit obtains the position information of each winding roller through the motor encoder of the winding shaft.

[0016] In one embodiment, the control unit further obtains position information of each winding roller and detects the position information of each winding roller, including:

[0017] Obtain the initial position information of each winding roller in real time;

[0018] The location information with complete data is selected from the initial location information for detection.

[0019] In one embodiment, the detection unit is provided at the winding-in roller area of each winding roller.

[0020] In one embodiment, the mechanical execution unit further includes a correction module and a slitting module;

[0021] The correction module includes a correction roller for correcting the deviation of the battery separator;

[0022] The slitting module includes a slitting device for slitting the battery separator to generate the sub-roll battery separator;

[0023] The detection unit is further provided on the deflection correction roller, and is used to detect whether there is a battery separator on the deflection correction roller when the deflection correction roller starts to correct the battery separator;

[0024] The control unit obtains a detection signal of the correction roller, and when the detection signal of the correction roller is greater than or equal to a second preset value, controls the correction roller to correct the deviation of the battery diaphragm; when the detection signal of the correction roller is less than the second preset value, controls the correction roller to suspend the deviation correction of the battery diaphragm;

[0025] and / or,

[0026] The detection unit is also provided on the slitting device, and is used to detect whether there is a battery separator on the slitting device when the slitting device starts to slit the battery separator;

[0027] The control unit obtains a detection signal of the slitting device, and when the detection signal of the slitting device is greater than or equal to a third preset value, controls the slitting device to slitting the battery diaphragm; when the detection signal of the slitting device is less than the third preset value, controls the slitting device to suspend slitting the battery diaphragm.

[0028] In one embodiment, the detection unit includes any one of a transmitting optical fiber, a photoelectric sensor, a laser displacement sensor, and an infrared sensor.

[0029] In one embodiment, the mechanical execution unit further includes a correction module and a slitting module;

[0030] The correction module includes a correction roller for correcting the deviation of the battery separator;

[0031] The slitting module includes a slitting device for slitting the battery separator to generate the sub-roll battery separator;

[0032] The control unit further obtains position information of the correction roller, detects the position information of the correction roller, and controls the correction roller to correct the deviation of the battery separator when the position information of the correction roller reaches a second preset position; and controls the correction roller to suspend the deviation correction of the battery separator when the position information of the correction roller does not reach the second preset position.

[0033] and / or,

[0034] The control unit also obtains the position information of the slitting device and detects the position information of the slitting device. When the position information of the slitting device reaches a third preset position, the slitting device is controlled to slitting the battery diaphragm; when the position information of the slitting device does not reach the third preset position, the slitting device is controlled to suspend slitting the battery diaphragm.

[0035] The battery diaphragm slitting system according to the above embodiment includes a mechanical execution unit, a detection unit, and a control unit. The detection unit is used to detect each winding roller in the mechanical execution unit to generate a corresponding detection signal. The control unit controls each winding roller to continue winding or pause winding according to the detection signal. The present application sets a detection unit to determine whether there is a sub-roll battery diaphragm entering the winding roller before the winding action, thereby avoiding damage to the sub-roll battery diaphragm or winding abnormality caused by startup failure in the case of an empty roll. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic structural diagram of a battery separator cutting system in one embodiment;

[0037] Figure 2 A schematic diagram of the structure of a mechanical execution unit in an embodiment Figure 1 ;

[0038] Figure 3 A schematic diagram of the structure of a mechanical execution unit in an embodiment Figure 2 ;

[0039] Figure 4 Schematic diagram of a display interface of a human-computer interaction unit in an embodiment. DETAILED DESCRIPTION

[0040] The present invention will be further described in detail below by means of specific embodiments in conjunction with the accompanying drawings. Similar elements in different embodiments are numbered with associated similar elements. In the following embodiments, many detailed descriptions are provided to enable the present application to be better understood. However, those skilled in the art will readily appreciate that some of the features may be omitted in different circumstances, or may be replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification. This is to avoid the core portion of the present application being overwhelmed by excessive descriptions, and for those skilled in the art, it is not necessary to describe these related operations in detail. They will fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0041] In addition, the features, operations, or characteristics described in the specification may be combined in any appropriate manner to form various embodiments. Furthermore, the steps or actions in the method description may be reordered or adjusted in a manner readily apparent to those skilled in the art. Therefore, the various sequences in the specification and drawings are provided solely for the purpose of clearly describing a particular embodiment and are not intended to be mandatory, unless otherwise specified.

[0042] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings).

[0043] The battery separator slitting system 20 provided in this application utilizes a detection unit 22 in the slitting system 20 to detect that the battery separator in the slitting system 20 has smoothly entered each process, thereby ensuring that each process does not suffer from slanting problems caused by the shaft not being in place when performing the corresponding action. At the same time, the slitting system 20 also obtains the position information of each process, determines the position of the shaft corresponding to each process based on the position information, and provides dual authentication to ensure that the slitting system 20 can operate normally without affecting the battery separator, which is explained in detail below.

[0044] Please refer to Figure 1 In one embodiment, the battery separator slitting system 20 includes a mechanical execution unit 21, a detection unit 22, and a control unit 23. The mechanical execution unit 21 is the core execution body of the battery separator slitting system 20. The detection unit 22 is used to detect the sub-roll battery separator in the mechanical execution unit 21. The control unit 23 controls the connection between the mechanical execution unit 21 and the detection unit 22, and controls the motors corresponding to the rollers in the mechanical execution unit 21 according to the detection signal output by the detection unit 22, so as to control the mechanical execution unit 21 to continue working or suspend working.

[0045] Please refer to Figure 2 In one embodiment, the mechanical execution unit 21 includes an unwinding module 211, a correction module 212, a tension control module 213, an electrostatic elimination module 214, an arc roller module 215, a slitting module 216, a winding module 217 and a transmission module 218.

[0046] In one embodiment, the unwinding module 211 is used to place a whole roll of battery separator and to stably and continuously supply the battery separator. The deviation correction module 212 is used to correct the offset of the battery separator to ensure the accuracy of slitting the battery separator into the sub-roll battery separator. The tension control module 213 is used to maintain a constant tension of the battery separator to prevent the battery separator from wrinkling or breaking. The static elimination module 214 is used to eliminate the static electricity generated by the battery separator during high-speed operation to avoid the adsorption of impurities. The arc roller module 215 is used to eliminate the wrinkles of the battery separator caused by winding, so that the battery separator can be unfolded flat. The slitting module 216 is used to slit the battery separator to obtain sub-roll battery separator. The winding module 217 is used to rewind the slit sub-roll battery separator. The transmission module 218 is used to continuously convey the battery separator and can be set from any process of the mechanical execution unit 21 to the next process to convey the battery separator.

[0047] The slitting system 20 provided in this application is as follows Figure 3 As shown, the unwinding module 211 steadily and continuously supplies the battery separator, while the first and second correction rollers 1 and 2 in the correction module 212 correct the deviation of the battery separator. After the first and second correction rollers 1 and 2 have corrected the deviation of the battery separator, the first transmission roller 3 in the transmission module 218 conveys the battery separator. After the tension control module 213 receives the battery separator, it uses the tension roller 4 to maintain constant tension in the battery separator. While the tension remains constant, the second and third transmission rollers 5 and 6 in the transmission module 218 convey the battery separator. During the conveyance of the battery separator by the second and third transmission rollers 5 and 6, the static elimination module 214 eliminates static electricity generated by the high-speed operation of the battery separator. After the static electricity is eliminated, the curved roller 7 in the curved roller module 215 eliminates wrinkles in the battery separator. The battery separator film is then transported to the slitting module 216 via the fourth and fifth transmission rollers 8 and 9 in the transmission module 218. The first and second cutter rollers 10 and 11 in the slitting module 216 slit the battery separator film to produce sub-rolls. The slit sub-rolls are then split into two paths. One path passes through the sixth transmission roller 12 in the transmission module 218 and is transported to the large winding roller 13 in the winding module 217. The other path passes through the seventh and second transmission rollers 14 and 15 in the transmission module 218 and is transported to the large winding roller 16 in the winding module 217. The winding module 217 finally winds the sub-rolls onto the upper and lower winding rollers, respectively, using the large winding rollers 13 and 16.

[0048] It should be noted that according to the battery separator slitting system 20 provided herein, the winding module 217 of the mechanical execution unit 21 includes at least one winding roller. The battery separator slitting system 20 utilizes each winding roller to rewind the slit battery separator film. The number of winding rollers in the battery separator slitting system 20 can be set according to the specifications of the battery separator slitting system 20.

[0049] In one embodiment, to ensure that the rewinding rollers in the battery separator slitting system 20 perfectly rewind the slit sub-roll of battery separator film, a detection unit 22 is provided on each rewinding roller. The detection unit 22 detects the presence of a sub-roll of battery separator film on each rewinding roller as it begins to rewind the sub-roll, thereby generating a corresponding detection signal.

[0050] It should be noted that, since the number of winding rollers in the slitting system 20 for battery separators of different specifications is different, the number of detection units 22 is also different. The detection units 22 are arranged on the winding rollers, so the number of detection units 22 follows the number of winding rollers.

[0051] In one embodiment, the control unit 23 is connected to each detection unit 22 and is used to obtain the detection signal of each winding roller to determine whether there is a sub-roll of battery separator film on each winding roller. When the detection signal of each winding roller is greater than or equal to a first preset value, it indicates that the sub-roll of battery separator film has successfully entered each winding roller, and the control unit 23 controls each winding roller to rewind the sub-roll of battery separator film. When the detection signal of any winding roller is less than the first preset value, it indicates that the sub-roll of battery separator film has not successfully entered the winding roller, and the control unit 23 controls the corresponding winding roller to suspend rewinding.

[0052] It should be noted that when the battery separator slitting system 20 has only one winding roller, the control unit 23 controls the winding roller to suspend winding as soon as it detects that the detection signal is less than a first preset value. When the battery separator slitting system 20 has multiple winding rollers, the control unit 23 can control all winding rollers to suspend winding when it detects that the detection signal of any winding roller is less than the first preset value, or it can control the corresponding winding roller whose detection signal is less than the first preset value to suspend winding. Specific control settings can be set according to actual project conditions.

[0053] In one embodiment, the detection unit 22 can be positioned in two different locations. The first is to position the detection unit 22 directly on the winding roller. To improve the accuracy of detecting the presence of a sub-roll of battery separator film on each winding roller as it begins to wind, the second option is to position the detection unit 22 in the reel-in area of each winding roller.

[0054] Please note that, please refer to Figure 3 The winding roller area refers to the path area where the sub-roll battery separator enters the upper winding roller and the lower winding roller from the winding large rubber roller 13 and the winding large rubber roller 16.

[0055] In one embodiment, to enhance the intelligence and safety of the battery separator slitting system 20, a detection unit 22 may be provided in each process of the battery separator slitting system 20. Preferably, the detection unit 22 may be provided in the correction module 212 and / or the slitting module 216.

[0056] In one embodiment, the detection unit 22 can be set on the first deflection correction roller 1 and the second deflection correction roller 2 of the deflection correction module 212, and is used to detect whether there is a battery separator on the first deflection correction roller 1 and the second deflection correction roller 2 when the first deflection correction roller 1 and the second deflection correction roller 2 begin to correct the battery separator. The control unit 23 obtains the detection signal of the first deflection correction roller 1 and the second deflection correction roller 2. When the detection signal of the first deflection correction roller 1 and the second deflection correction roller 2 is greater than or equal to the second preset value, it indicates that the battery separator has successfully entered the first deflection correction roller 1 and the second deflection correction roller 2. The control unit 23 controls the first deflection correction roller 1 and the second deflection correction roller 2 to correct the deviation of the battery separator; when the detection signal of the first deflection correction roller 1 and the second deflection correction roller 2 is less than the second preset value, it indicates that the battery separator has not successfully entered the first deflection correction roller 1 and the second deflection correction roller 2. The control unit 23 controls the first deflection correction roller 1 and the second deflection correction roller 2 to suspend the deviation correction of the parent roll battery separator.

[0057] In one embodiment, the detection unit 22 may also be provided on the slitting device of the slitting module 216. The slitting device of the present application is the first cutter roller 10 and the second cutter roller 11. The detection unit 22 detects whether there is a battery separator on the first cutter roller 10 and the second cutter roller 11 when the first cutter roller 10 and the second cutter roller 11 are slitting the battery separator. The control unit 23 obtains the detection signals of the first cutter roller 10 and the second cutter roller 11. When the detection signals of the first cutter roller 10 and the second cutter roller 11 are greater than or equal to the third preset value, it indicates that the battery diaphragm has successfully entered the first cutter roller 10 and the second cutter roller 11, and the control unit 23 controls the first cutter roller 10 and the second cutter roller 11 to cut the battery diaphragm; when the detection signals of the first cutter roller 10 and the second cutter roller 11 are less than the third preset value, it indicates that the battery diaphragm has not successfully entered the first cutter roller 10 and the second cutter roller 11, and the control unit 23 controls the first cutter roller 10 and the second cutter roller 11 to suspend cutting the battery diaphragm.

[0058] It should be noted that the battery separators in the correction module 212 and the slitting module 216 are parent roll battery separators, that is, battery separators that have not yet been slit and are placed by the unwinding module 211. In addition, the first preset value, the second preset value, and the third preset value can be the same value or different values.

[0059] In one embodiment, the detection unit 22 may be any one of a transmitting optical fiber, a photoelectric sensor, a laser displacement sensor, and an infrared sensor.

[0060] In one embodiment, when the detection unit 22 utilizes a radiating optical fiber, the radiating optical fiber includes a transmitting end and a receiving end, which are positioned on each winding roller to correspond to the film path of the sub-roll battery separator film. The radiating optical fiber is used to detect the presence of a sub-roll battery separator film on each winding roller, with the corresponding detection signal generated serving as an optical sensing value. Only when the optical sensing value is greater than or equal to a first preset value does the control unit 23 control the winding roller to operate or accelerate. When the optical sensing value is less than the first preset value, the control unit 23 controls the winding roller to lock the winding roller motor and pause winding, thereby improving the slitting yield.

[0061] It should be noted that when the battery diaphragm slitting system 20 is operating normally, the sub-roll battery diaphragm passes through the winding rollers, and the emitting optical fiber is blocked, so that the optical sensing value is greater than or equal to the first preset value, which means that a membrane signal is generated; if there is no sub-roll battery diaphragm passing through the detection area of the emitting optical fiber or the signal strength is insufficient, the emitting optical fiber will not be blocked, so that the optical sensing value is less than the first preset value, which means that a no-membrane signal is generated.

[0062] In one embodiment, the battery diaphragm slitting system 20 is an axis drive system that requires strict positioning and sequential operation. Therefore, in the battery diaphragm slitting system 20, it is necessary to detect the position information of each winding roller, detect the actual position reached by the corresponding winding shaft in each winding roller in real time, and control the corresponding winding shaft to move forward or backward according to the position information.

[0063] Specifically, the control unit 23 also obtains the position information of each winding roller and detects the position information of each winding roller. When the position information of each winding roller reaches the first preset position, each winding roller is controlled to rewind the sub-roll battery diaphragm; when the position information of any winding roller does not reach the first preset position, the corresponding winding roller is controlled to pause rewinding.

[0064] It should be noted that the first preset position here refers to the theoretical position that each winding roller should reach at present. When there is only one winding roller in the battery diaphragm slitting system 20, the control unit 23 controls the winding roller to suspend winding as long as it detects that the position information has not reached the first preset position. When there are multiple winding rollers in the battery diaphragm slitting system 20, when the control unit 23 detects that the position information of any winding roller has not reached the first preset position, it can control all the winding rollers to suspend winding, or it can control the corresponding winding roller that has not reached the first preset position to suspend winding. The specific control can be set according to the actual engineering situation.

[0065] In one embodiment, since the winding rollers cover the outside of the winding shaft, the control unit 23 can obtain the position information of each winding roller through the motor encoder of the winding shaft.

[0066] In one embodiment, in order to ensure accurate detection of position information, the control module acquires the initial position information of each winding roller in real time, and selects complete and valid position information from the initial position information for detection.

[0067] It should be noted that under normal circumstances, the motor encoder will periodically or continuously output position information. If there is an interruption or disconnection, the position information is considered incomplete. If using communication methods such as CAN and RS485, the integrity of the initial position information can be verified by monitoring for frame loss, timeouts, and CRC check failures. The validity of the position information refers to whether the position information accurately reflects whether each winding roller is within the correct position range. A valid position range can be set to determine the validity of the position information.

[0068] Please refer to Figure 4 In one embodiment, in order to achieve dual authentication of the winding roller, the battery separator slitting system 20 further includes a human-machine interaction unit, which includes a forward control and a backward control.

[0069] In one embodiment, when the control unit 23 detects that the position information of any winding roller has not reached the first preset position, the human-computer interaction unit will prompt that the position has not been reached. When the control unit 23 detects that the position information of each winding roller has reached the first preset position, the forward control and reverse control on the human-computer interaction unit can be operated. The operator operates the forward control or reverse control on the human-computer interaction unit according to preset requirements. In response to the operation of the forward control or reverse control, the control unit 23 controls each winding roller to move forward or reverse according to the forward control or reverse control.

[0070] It should be noted that when the control unit 23 detects that the position information of each winding roller has reached the first preset position, the human-computer interaction unit may or may not provide a prompt indicating that the position has been reached. However, regardless of whether the human-computer interaction unit provides a prompt or not, the forward control or the reverse control will be effective when the position information of each winding roller has reached the first preset position. In other words, the forward control or the reverse control can only be operated when the position information of all winding rollers has reached the first preset position.

[0071] Furthermore, if the battery separator slitting system 20 has only one winding roller, the forward and reverse controls on the human-machine interface unit are specific to that winding roller. If the battery separator slitting system 20 has multiple winding rollers, the human-machine interface unit may display multiple forward and reverse controls, each corresponding to a respective winding roller. Alternatively, the human-machine interface unit may display only one forward and reverse control, but this forward and reverse control is operable only when all winding rollers have reached a first preset position.

[0072] In one embodiment, to improve the intelligence and safety of the battery separator slitting system 20, the position information of each process in the battery separator slitting system 20 can be obtained. The position information of the correction module 212 and / or the slitting module 216 can be obtained first.

[0073] In one embodiment, the control unit 23 can obtain the position information of the first correcting roller 1 and the second correcting roller 2 of the correction module 212. When the position information of the first correcting roller 1 and the second correcting roller 2 reaches the second preset position, the first correcting roller 1 and the second correcting roller 2 are controlled to correct the offset of the battery diaphragm; when the position information of the first correcting roller 1 and the second correcting roller 2 does not reach the second preset position, the first correcting roller 1 and the second correcting roller 2 are controlled to suspend the correction of the offset of the parent roll battery diaphragm.

[0074] In one embodiment, the detection unit 22 can also obtain the position information of the slitting device of the slitting module 216. The slitting device of the present application is the first cutter roller 10 and the second cutter roller 11. The control unit 23 obtains the position information of the first cutter roller 10 and the second cutter roller 11. When the position information of the first cutter roller 10 and the second cutter roller 11 reaches the third preset position, the first cutter roller 10 and the second cutter roller 11 are controlled to slit the battery separator; when the detection signal of the first cutter roller 10 and the second cutter roller 11 does not reach the third preset position, the first cutter roller 10 and the second cutter roller 11 are controlled to suspend slitting the battery separator.

[0075] Similarly, when the detection unit 22 obtains the position information of each process in the battery separator slitting system 20, it can also prompt the human-computer interaction unit. The human-computer interaction unit can also set forward and backward controls for each process. Then, after the control module determines the position information of each process in the slitting system 20, it can also respond to the operator's operation of the human-computer interaction unit to complete the dual authentication of the position information of each process.

[0076] It should be noted that the second preset position here is the theoretical position that the correction module 212 should currently reach, and the third preset position is the theoretical position that the slitting module 216 should currently reach.

[0077] In the battery diaphragm slitting system 20 that requires strict control of shaft winding and requires sequential operation of shaft feeding and winding, the winding module 217 needs to complete operations such as winding, loading, running and unloading according to a predetermined program. Due to its complex structure and high requirements for movement accuracy, it is easy to have problems such as inaccurate positioning and poor synchronization, which may cause the battery diaphragm slitting system 20 to operate abnormally or affect the product yield of the battery diaphragm. Therefore, the battery diaphragm slitting system 20 provided by the present application can detect the winding rollers in the winding module 217. When the position information of all the winding rollers does not reach the first preset position, the battery diaphragm slitting system 20 is prohibited from operating, ensuring that the battery diaphragm slitting system 20 can operate safely and smoothly, thereby greatly improving the yield rate of the sub-roll battery diaphragm after slitting.

[0078] Those skilled in the art will appreciate that all or part of the functions of the various methods in the above embodiments can be implemented by hardware or by computer program. When all or part of the functions in the above embodiments are implemented by computer program, the program can be stored in a computer-readable storage medium, and the storage medium can include: read-only memory, random access memory, disk, optical disk, hard disk, etc., and the program is executed by a computer to implement the above functions. For example, the program is stored in the memory of the device, and when the program in the memory is executed by the processor, all or part of the above functions can be implemented. In addition, when all or part of the functions in the above embodiments are implemented by computer program, the program can also be stored in a storage medium such as a server, another computer, disk, optical disk, flash disk or mobile hard disk, and saved in the memory of the local device by downloading or copying, or the system of the local device is updated. When the program in the memory is executed by the processor, all or part of the functions in the above embodiments can be implemented.

[0079] The above examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. Those skilled in the art can make several simple deductions, modifications or substitutions based on the concept of the present invention.

Claims

1. A battery separator slitting system, characterized in that: include: A mechanical execution unit, the mechanical execution unit including a winding module, the winding module including at least one winding roller, using each winding roller to wind up the slit sub-roll battery separator; A detection unit, the detection unit being provided on each winding roller and configured to detect whether a sub-roll of battery separator film is present on each winding roller when the winding roller begins to wind the sub-roll of battery separator film, so as to generate a corresponding detection signal; A control unit is connected to the detection unit and is used to obtain the detection signal of each winding roller. When the detection signal of each winding roller is greater than or equal to a first preset value, each winding roller is controlled to rewind the sub-roll battery diaphragm; when the detection signal of any winding roller is less than the first preset value, the corresponding winding roller is controlled to pause rewinding.

2. The battery separator slitting system according to claim 1, characterized in that: The control unit further obtains position information of each winding roller, detects the position information of each winding roller, and controls each winding roller to rewind the sub-roll battery separator when the position information of each winding roller reaches a first preset position; When the position information of any winding roller does not reach the first preset position, the corresponding winding roller is controlled to stop winding.

3. The battery separator slitting system according to claim 2, characterized in that: The battery separator slitting system further includes a human-computer interaction unit, and the human-computer interaction unit includes a forward control and a backward control; When the position information of each winding roller reaches the first preset position, in response to the user's operation of the forward control or the backward control on the human-computer interaction unit, the control unit controls each winding roller to move forward or backward according to the forward control or the backward control.

4. The battery separator slitting system according to claim 3, characterized in that: When the control unit detects that the position information of any winding roller has not reached the first preset position, the human-computer interaction unit prompts that the position has not reached the first preset position.

5. The battery separator slitting system according to claim 2, characterized in that: The winding rollers are covered on the outside of the winding shaft, and the control unit obtains the position information of each winding roller through the motor encoder of the winding shaft.

6. The battery separator slitting system according to claim 5, characterized in that: The control unit further obtains the position information of each winding roller and detects the position information of each winding roller, including: Obtain the initial position information of each winding roller in real time; The location information with complete data is selected from the initial location information for detection.

7. The battery separator slitting system according to claim 1, wherein: The detection unit is arranged at the winding-in roller area of each winding roller.

8. The battery separator slitting system according to claim 7, characterized in that: The mechanical execution unit also includes a correction module and a slitting module; The correction module includes a correction roller for correcting the deviation of the battery separator; The slitting module includes a slitting device for slitting the battery separator to generate the sub-roll battery separator; The detection unit is further provided on the deflection correction roller, and is used to detect whether there is a battery separator on the deflection correction roller when the deflection correction roller starts to correct the battery separator; The control unit obtains a detection signal of the correction roller, and when the detection signal of the correction roller is greater than or equal to a second preset value, controls the correction roller to correct the deviation of the battery diaphragm; when the detection signal of the correction roller is less than the second preset value, controls the correction roller to suspend the deviation correction of the battery diaphragm; and / or, The detection unit is also provided on the slitting device, and is used to detect whether there is a battery separator on the slitting device when the slitting device starts to slit the battery separator; The control unit obtains a detection signal of the slitting device, and when the detection signal of the slitting device is greater than or equal to a third preset value, controls the slitting device to slitting the battery diaphragm; when the detection signal of the slitting device is less than the third preset value, controls the slitting device to suspend slitting the battery diaphragm.

9. The battery separator slitting system according to claim 8, characterized in that: The detection unit includes any one of a transmitting optical fiber, a photoelectric sensor, a laser displacement sensor and an infrared sensor.

10. The battery separator slitting system according to claim 2, characterized in that: The mechanical execution unit also includes a correction module and a slitting module; The correction module includes a correction roller for correcting the deviation of the battery separator; The slitting module includes a slitting device for slitting the battery separator to generate the sub-roll battery separator; The control unit further obtains position information of the correction roller, detects the position information of the correction roller, and controls the correction roller to correct the deviation of the battery separator when the position information of the correction roller reaches a second preset position; When the position information of the deviation-correcting roller does not reach the second preset position, controlling the deviation-correcting roller to suspend the deviation correction of the battery separator; and / or, The control unit also obtains the position information of the slitting device and detects the position information of the slitting device. When the position information of the slitting device reaches a third preset position, the slitting device is controlled to slitting the battery diaphragm; when the position information of the slitting device does not reach the third preset position, the slitting device is controlled to suspend slitting the battery diaphragm.

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