Pole piece cutting method, equipment and device, control terminal and readable storage medium

Abstract

The invention relates to the technical field of pole piece cutting, and discloses a pole piece cutting method, equipment and device, a control terminal and a readable storage medium, and the method comprises the following steps: obtaining a pole lug distance between adjacent pole lugs in a pole piece detected by a correlation sensor in real time; determining whether the tab spacing is in a cutting interval or not, and if the tab spacing is in the cutting interval, determining the pole piece segment corresponding to the tab spacing as a cutting segment; and when the cutting section is wound to the position of a cutter along with the pole piece, controlling the cutter to cut the cutting section. According to the method, the cutting efficiency is improved, and the pole piece cutting work is more stable.

Description

Technical Field

[0001] The present application relates to the field of pole piece cutting technology, and in particular to a pole piece cutting method, equipment, device, control terminal and readable storage medium. Background Art

[0002] In the lithium battery process, the pole piece ears and MARK holes are formed through the laser cutting process when the pole piece is die-cut. The main function of the MARK hole is to help distinguish the two pole pieces during the winding process. The square winding equipment identifies the position of the MARK hole through the sensor to determine the cutting position, which can accurately distinguish the two different pole pieces and ensure the accuracy and consistency of the winding length. However, when cutting by detecting the MARK hole, because the detection area of ​​the MARK hole is relatively small, when the pole piece is offset or the material line jitters, the position of the MARK hole changes, and the probability of sensor sensing error is relatively high. When the MARK hole senses incorrectly, it will lead to incorrect cutting, resulting in unqualified wound batteries and waste of pole pieces. Summary of the invention

[0003] In view of this, the embodiments of the present application provide a pole piece cutting method, equipment, device, control terminal and readable storage medium, which can effectively solve the problem of easy incorrect cutting of pole pieces.

[0004] In a first aspect, an embodiment of the present application provides a pole piece cutting method, comprising:

[0005] Obtaining the distance between adjacent pole ears in the pole piece detected in real time by the through-beam sensor;

[0006] Determine whether the tab spacing is in the cutting interval, and if the tab spacing is in the cutting interval, determine the pole piece segment corresponding to the tab spacing as the cutting segment;

[0007] When the cutting segment is wound along with the pole piece to the position of the cutter, the cutter is controlled to perform a cutting operation on the cutting segment.

[0008] In one embodiment, the real-time detection of the distance between adjacent tabs in the pole piece by the through-beam sensor includes:

[0009] Real-time sensing of the pole lugs in the pole piece;

[0010] When the current pole lug is detected, determining and saving the current winding distance of the current pole piece;

[0011] Determine whether there is an adjacent pole lug before the current pole lug, and if so, obtain the historical winding distance corresponding to the adjacent pole lug;

[0012] According to the current winding distance and the historical winding distance, a pole lug spacing between the current pole lug and the adjacent pole lug is obtained.

[0013] In one embodiment, when the cutting segment is wound along with the pole piece to the cutting knife position, controlling the cutting knife to cut the cutting segment includes:

[0014] When the cutting segment is detected, the current winding distance of the pole piece is recorded as the cutting position latching distance;

[0015] Determining an actual cutting distance according to the head length, the tail length, the length of the cutting section and the default cutting distance of the pole piece;

[0016] When the current winding distance is the sum of the actual cutting distance and the cutting position latching distance, a cutting operation is performed on the cutting segment.

[0017] In one embodiment, determining the actual cutting distance according to the head length, the tail length, the length of the cutting section and the default cutting distance of the pole piece includes:

[0018] The length of the pole piece between the through-beam sensor and the cutter is the default cutting distance;

[0019] Determining a cutting offset according to the head length, the tail length and the length of the cutting segment;

[0020] The actual cutting distance is obtained according to the default cutting distance and the cutting offset.

[0021] In one embodiment, the cutting interval is set based on a preset cutting segment distance, and the cutting segment distance includes a first cutting distance and a second cutting distance;

[0022] The first cutting distance is greater than a general tab distance, and the second cutting distance is less than the general tab distance;

[0023] The first cutting distance is obtained according to the error value to obtain the first interval, and the second cutting distance is obtained according to the error value to obtain the second interval.

[0024] In one embodiment, determining whether the tab spacing is within the cutting interval includes:

[0025] Determining whether the tab spacing is within the first interval or the second interval;

[0026] If the tab spacing is not within the first interval or the second interval, the tab spacing is not within the cutting interval; otherwise, it is within the cutting interval.

[0027] In a second aspect, the present application provides a pole piece cutting system, comprising: a transmission motor, a beam sensor, an encoder and a cutter, wherein the pole piece passes through the beam sensor, the encoder and the cutter via the transmission motor;

[0028] The through-beam sensor is used to detect the distance between adjacent pole lugs in the pole piece in real time;

[0029] The encoder is used to record the winding distance of the pole piece and determine the distance between the pole lugs according to the position of each pole lug; determine whether the distance between the pole lugs is in the cutting interval, and if the distance between the pole lugs is in the cutting interval, the pole piece segment corresponding to the distance between the pole lugs is the cutting segment;

[0030] The cutter is used to determine the cutting operation when the cutting section reaches the cutter position according to the winding distance.

[0031] In a third aspect, the present application provides a pole piece cutting device, comprising:

[0032] A detection module, used for obtaining the distance between adjacent pole ears in the pole piece detected in real time by the through-beam sensor;

[0033] A judgment module, used to determine whether the distance between the pole tabs is in the cutting interval, and if the distance between the pole tabs is in the cutting interval, determine that the pole piece segment corresponding to the distance between the pole tabs is a cutting segment;

[0034] The cutting module is used to control the cutter to cut the cutting segment when the cutting segment is wound along with the pole piece to the position of the cutter.

[0035] In a fourth aspect, the present application provides a control terminal, which includes a processor and a memory, wherein the memory stores a computer program, and the processor is used to execute the computer program to implement the pole piece cutting method.

[0036] In a fifth aspect, the present application provides a computer-readable storage medium storing a computer program, which, when executed on a processor, implements the pole piece cutting method.

[0037] The embodiments of the present application have the following beneficial effects:

[0038] The present application determines the position of the cutting section by detecting the distance between the pole ears, has better stability, and does not need to add other markers on the substrate, thus saving steps in the die-cutting process and increasing the efficiency of pole piece cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 A schematic diagram of the structure of a pole piece cutting system according to an embodiment of the present application is shown;

[0041] Figure 2 A flow chart of a pole piece cutting method according to an embodiment of the present application is shown;

[0042] Figure 3 A schematic diagram of a pole piece according to an embodiment of the present application is shown;

[0043] Figure 4 A schematic structural diagram of a pole piece cutting device according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0045] The components of the embodiments of the present application generally described and shown in the drawings herein may be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0046] Hereinafter, the terms "including", "having" and their cognates that can be used in various embodiments of the present application are intended only to indicate specific features, numbers, steps, operations, elements, components or a combination of the foregoing items, and should not be understood as first excluding the existence of one or more other features, numbers, steps, operations, elements, components or a combination of the foregoing items or increasing the possibility of one or more features, numbers, steps, operations, elements, components or a combination of the foregoing items. In addition, the terms "first", "second", "third" and the like are only used to distinguish descriptions and cannot be understood as indicating or implying relative importance.

[0047] Unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meanings as those generally understood by those skilled in the art to which the various embodiments of the present application belong. The terms (such as those defined in generally used dictionaries) will be interpreted as having the same meanings as the contextual meanings in the relevant technical field and will not be interpreted as having idealized meanings or overly formal meanings unless clearly defined in the various embodiments of the present application.

[0048] The pole piece cutting method of the present application is applied to the pole piece cutting scene. Different from the method of using MARK holes to identify the cutting position for cutting operations, the technical solution of the present application identifies the distance between the pole ears in the pole piece to determine the position of the cutting segment to be cut, and then controls the cutter to perform the cutting operation by calculation when the cutting segment reaches the cutter position. The method of the present application can also correctly identify the cutting segment when the pole piece is offset or jittered, and compared with the tiny MARK holes, the method of the present application is easier to identify and does not require additional cutting of the MARK holes.

[0049] Next, the technical solution of the present application is described with specific embodiments.

[0050] The pole piece cutting method is described below with reference to some specific embodiments.

[0051] Figure 1 A structural diagram of a pole piece cutting system according to an embodiment of the present application is shown. The pole piece cutting system comprises: a plurality of transmission motors 100, a beam sensor 200, an encoder 300 and a cutter 400.

[0052] The transmission motor 100 is used to transport the pole piece mounted on the transmission motor by winding and rolling. The pole piece has pole ears cut by laser cutting technology. When the pole piece passes through the through-beam sensor 200 during transmission, the through-beam sensor 200 can identify the pole ears on the pole piece.

[0053] The above-mentioned electrode piece can be a positive electrode piece or a negative electrode piece, and the positive and negative poles of the electrode piece do not affect the technical solution of this embodiment.

[0054] In one embodiment, the through-beam sensor 200 may be a photoelectric through-beam sensor, specifically a photoelectric switch consisting of a light emitter and a light receiver. Because the pole ear is a shape obtained after cutting on the pole piece, its edge allows light to pass through the edge of the pole ear due to laser cutting. Therefore, when the pole ear passes through the through-beam sensor 200, the light from the light emitter can pass through the edge of the pole ear and hit the receiver on the opposite side, thereby recognizing the passage of the pole ear.

[0055] The encoder 300 is used to record the winding length of the pole piece, and the encoder 300 can calculate the distance between two adjacent pole tabs according to the position of the pole tabs detected by the through-beam sensor 200, so as to determine the cutting segment according to the distance between the pole tabs.

[0056] The cutter 400 is used to cut the cut segments in the pole piece.

[0057] The system may also include a control terminal, which is used to control the transmission motor 100, the beam sensor 200, the encoder 300 and the cutter 400 to perform corresponding operations, thereby achieving precise cutting of the pole piece.

[0058] like Figure 2 FIG. 1 is a flow chart of a method for cutting a pole piece according to an embodiment of the present invention, and the method comprises:

[0059] Step S100, obtaining the distance between adjacent pole lugs in the pole piece detected in real time by the through-beam sensor.

[0060] The method of the embodiment is applied to Figure 1 In the cutting device shown.

[0061] When the through-beam sensor 200 detects the pole ears, the distance between the pole ears can be measured.

[0062] Specifically, when the current pole lug is detected, the current winding distance of the current pole piece is determined and saved.

[0063] The current winding distance of the pole piece is recorded in real time by the encoder 300, that is, when the pole ear is detected, the corresponding sensor can send a signal to the encoder, and the encoder records the current winding distance at this time.

[0064] The winding distance refers to the length of the pole piece from the beginning of winding to the current moment.

[0065] Determine whether there is an adjacent pole lug before the current pole lug, and if so, obtain the historical winding distance corresponding to the adjacent pole lug.

[0066] It can be understood that if the current tab is the first tab of the pole piece, there is no other tab before the tab, and there is no historical winding distance. If it is not the first tab, when the current tab is identified, it can be traced back to determine the historical winding distance corresponding to the previous tab.

[0067] According to the current winding distance and the historical winding distance, a pole lug spacing between the current pole lug and the adjacent pole lug is obtained.

[0068] Because the pole piece will be transported forward all the time with the operation of the transmission motor, the current winding distance is one pole ear spacing larger than the historical winding distance. Therefore, by subtracting the historical winding distance from the current winding distance, the pole ear spacing between the current pole ear and the previous adjacent pole ear can be calculated.

[0069] Among them, Figure 3 The figure shows the schematic diagram of the pole ears and the distance between the pole ears on the pole piece.

[0070] There are multiple pole ears 500 on the pole piece, and the distance between each pole ear is as follows: Figure 3 As shown, it can be calculated by the above method, wherein the height of the pole ear is generally 5-35mm, the width of the pole ear is 15-40mm, and the detection range of the MARK hole is only a semicircle with a diameter of 2mm. It can be seen that the pole ear is easier to detect than the MARK hole, which can reduce the cutting position detection errors caused by slight offset of the pole piece, and the detection stability is also high.

[0071] Step S200, determining whether the tab spacing is in the cutting interval, if the tab spacing is in the cutting interval, determining the pole piece segment corresponding to the tab spacing as the cutting segment.

[0072] After obtaining the tab spacing, it is possible to determine whether the pole piece segment between the current tab and the previous adjacent tab is a cutting segment based on whether the tab spacing is in the cutting interval. If the tab spacing is in the cutting interval, the pole piece segment is a cutting segment, otherwise it is not.

[0073] The cutting segment indicates the location where the cutting operation needs to be performed.

[0074] The cutting interval is set based on a preset cutting segment distance, and the cutting segment distance includes a first cutting distance and a second cutting distance. The first cutting distance is greater than a general tab distance, and the second cutting distance is less than the general tab distance.

[0075] It should be noted that the purpose of cutting the electrode piece is to obtain multiple battery cell electrode pieces, which are used to make battery cells. Therefore, the junction between two battery cell electrode pieces is the cutting section. In order to reflect the difference between the cutting section and the segment between the tabs in the battery cell, when the tabs are cut, the cutting distance of this cutting section is different from the spacing between the tabs in the battery cell. The tab spacing in the battery cell is the general tab spacing.

[0076] The cutting distance can be much larger than the general tab distance or much smaller than the general tab distance. Therefore, at least two cutting distances can be set, one of which is larger than the general tab distance and the other is smaller than the general tab distance.

[0077] At the same time, considering that there may be a certain deviation in the recorded thermal separation distance, this deviation comes from reasons such as signal transmission delay. Therefore, for the above two cutting distances, it is necessary to combine the deviation value to generate two corresponding cutting intervals.

[0078] Therefore, when judging whether the tab spacing is within the cutting interval, it is necessary to determine whether the tab spacing is within the first interval or the second interval.

[0079] If the tab spacing is not within the first interval or the second interval, the tab spacing is not within the cutting interval; otherwise, it is within the cutting interval.

[0080] It is determined that the current tab spacing is within the cutting interval, and the cutting segment that needs to be cut is found.

[0081] Among them Figure 3 As shown, the length of the cutting section is obviously longer than the distance between the tabs in front, and there is an obvious difference in length. Even considering the existence of errors, there is no intersection between the general tab distance and the cutting interval, avoiding misjudgment. For example, the general tab distance can be about 170 mm to 180 mm, while the cutting interval can be about 240 mm to 250 mm. The significant difference between the two can clearly identify and judge the cutting section.

[0082] Step S300, when the cut segment is wound along with the pole piece to the position of the cutter, the cutter is controlled to cut the cut segment.

[0083] After the cutting segment is determined, it is necessary to cut the cutting segment. It can be understood that the cutting segment itself has a length, and the cutter does not cut at a random position in the cutting segment, but needs to consider the head length and tail length of the pole piece for cutting.

[0084] At the same time, according to Figure 1 It can be seen from the structure that when determining the cutting section, the cutting section is still located at the through-beam sensor, and the length of the pole piece between the through-beam sensor and the cutter is also fixed, so it is only necessary to measure this distance in advance to determine how long the pole piece continues to be wound before this cutting section reaches the cutter position. Therefore, the length of the pole piece between the through-beam sensor and the cutter is the default cutting distance.

[0085] The head length and tail length of the electrode piece are fixed values. The head length refers to the length from the head of a battery cell electrode piece to the first electrode ear at the head, and the tail length refers to the length from the tail of the battery cell electrode piece to the first electrode ear at the tail.

[0086] Because the cutting section is the connection area between two adjacent battery cell pole pieces, that is, the connection area between the tail of the previous battery cell pole piece and the head of the current battery cell pole piece, when cutting, it is necessary to leave a tail length for the previous battery cell pole piece and a head length for the current battery cell pole piece.

[0087] Combination Figure 1 It can be seen from the transportation direction of the middle pole piece that when the cutting section is detected, the pole ear behind the cutting section is located below the opposing sensor. Therefore, when the pole piece is wound again at the default cutting distance, the pole ear behind the cutting section arrives below the cutter. Obviously, it cannot be cut according to the default cutting distance. Therefore, it is necessary to determine the cutting offset based on the head length, the tail length and the length of the cutting section. According to the cutting offset and the default cutting distance, the actual cutting distance can be calculated.

[0088] Generally speaking, the length of the cut section is greater than or equal to the sum of the head length and the tail length, so the present embodiment does not consider the case where the length of the cut section is less than the sum of the head length and the tail length. The length of the cut section is the tab spacing obtained by the previous detection, which is a known value.

[0089] When the length of the cut segment is equal to the sum of the head length and the tail length, such as Figure 3 As shown, there is only one cutting offset, namely the head length, and the default cutting distance - head length = actual cutting distance. In this case, cutting according to the actual cutting distance calculated in the above manner can make the tail length of the previous battery cell electrode sheet meet the requirements, and the head distance of the next battery cell electrode sheet meet the requirements.

[0090] When the length of the cut segment is greater than the sum of the head length and the tail length, there is a situation where the cut segment length - head length - tail length = x, where x is the extra length. Obviously, only one cut cannot satisfy both the head length and the tail length at the same time, so two cuts are required. For these two cuts, there are two actual cutting distances.

[0091] Therefore, there exists: first actual cutting distance = default cutting distance - head length;

[0092] The second actual cutting distance = default cutting distance - head length - x.

[0093] Through the above method, the corresponding actual cutting distance can be calculated according to different situations.

[0094] In order to locate the cutting section, when the cutting section is detected, the encoder will also record the current winding distance of the pole piece as the cutting position latching distance.

[0095] When the pole piece continues to be wound, the encoder will continuously update the current winding distance. When the current winding distance is the sum of the actual cutting distance and the cutting position latch distance, the cutter can be controlled to perform a cutting operation on the cutting segment. It can be understood that when there are two actual cutting distances, there will also be two sums of the actual cutting distance and the cutting position latch distance, and two cutting operations will be performed according to the two distances.

[0096] The pole piece cutting method of this embodiment determines the pole piece spacing between adjacent pole pieces by identifying the pole pieces, and then determines the position of the cutting section according to the pole piece spacing, and then determines the cutting time of the cutter according to the set head length, tail length, default cutting distance and measured cutting section length, so as to realize the cutting operation of the pole piece. Because the pole piece itself is more prominent, it is easier to detect, and even if the pole piece has deviations such as tilt, it will not affect the detection of the pole piece. Therefore, within the allowable error range, the cutting section on the pole piece can be detected, so that the cutting section can be cut. Compared with the prior art, the method of this embodiment is more stable. At the same time, there is no need to add additional markings such as MARK holes on the pole piece, which reduces this process and improves the efficiency of the die-cutting process. At the same time, for pole pieces of different sizes or rules, it is only necessary to adjust the detection parameters of the pole piece spacing, without redesigning or adjusting the cutting mark, and it has extremely high adaptability.

[0097] Figure 4 A schematic diagram of the structure of a pole piece cutting device according to an embodiment of the present application is shown. Exemplarily, the device comprises:

[0098] The detection module 10 is used to obtain the distance between adjacent pole ears in the pole piece detected in real time by the through-beam sensor;

[0099] A judgment module 20 is used to determine whether the distance between the pole tabs is in the cutting interval. If the distance between the pole tabs is in the cutting interval, the pole piece segment corresponding to the distance between the pole tabs is determined as the cutting segment;

[0100] The cutting module 30 is used to control the cutter to cut the cutting segment when the cutting segment is wound along with the pole piece to the position of the cutter.

[0101] This embodiment further provides a control terminal, which includes a processor and a memory, wherein the memory stores a computer program, and the processor is used to execute the computer program to implement the pole piece cutting method.

[0102] The control terminal is mainly used to control Figure 1 The cutting device shown may specifically be a central control machine integrated into the cutting device, or may be a host computer or other machine connected to the cutting device.

[0103] This embodiment also provides a computer-readable storage medium storing a computer program. When the computer program is executed on a processor, the pole piece cutting method is implemented.

[0104] It can be understood that the device of this embodiment corresponds to the method of the above embodiment, and the options in the above embodiment are also applicable to this embodiment, so they will not be described repeatedly here.

[0105] Among them, the processor can be an integrated circuit chip with signal processing capabilities. The processor can be a general-purpose processor, including a central processing unit (CPU), a graphics processing unit (GPU) and a network processor (NP), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or at least one of other programmable logic devices, discrete gates or transistor logic devices, and discrete hardware components. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc., which can implement or execute the disclosed methods, steps and logic block diagrams in the embodiments of the present application.

[0106] The memory may be, but is not limited to, a random access memory (RAM), a read only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), etc. The memory is used to store a computer program, and the processor may execute the computer program accordingly after receiving an execution instruction.

[0107] The computer-readable storage medium may include, but is not limited to, various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0108] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and structure diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in an alternative implementation, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the structure diagram and / or the flow diagram, and the combination of boxes in the structure diagram and / or the flow diagram, can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0109] In addition, the functional modules or units in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0110] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a smart phone, a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the various embodiments of the present application.

[0111] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application.

Claims

1. A pole piece cutting method, characterized in that: include: Obtaining the distance between adjacent pole ears in the pole piece detected in real time by the through-beam sensor; Determine whether the tab spacing is in the cutting interval, and if the tab spacing is in the cutting interval, determine the pole piece segment corresponding to the tab spacing as the cutting segment; When the cutting segment is wound along with the pole piece to the position of the cutter, the cutter is controlled to perform a cutting operation on the cutting segment.

2. The pole piece cutting method according to claim 1, characterized in that: The real-time detection of the distance between adjacent pole lugs in the pole piece by the through-beam sensor includes: Real-time detection of pole lugs in pole pieces; When the current pole lug is detected, determining and saving the current winding distance of the current pole piece; Determine whether there is an adjacent pole lug before the current pole lug, and if so, obtain the historical winding distance corresponding to the adjacent pole lug; According to the current winding distance and the historical winding distance, a tab spacing between the current tab and the adjacent tab is obtained.

3. The pole piece cutting method according to claim 1, characterized in that: When the cutting segment is wound along with the pole piece to the cutting knife position, controlling the cutting knife to cut the cutting segment comprises: When the cutting section is detected, the current winding distance of the pole piece is recorded as the cutting position latching distance; Determining an actual cutting distance according to the head length, the tail length, the length of the cutting section and the default cutting distance of the pole piece; When the current winding distance is the sum of the actual cutting distance and the cutting position latching distance, a cutting operation is performed on the cutting segment.

4. The pole piece cutting method according to claim 3, characterized in that: The determining of the actual cutting distance according to the head length, the tail length, the length of the cutting section and the default cutting distance of the pole piece comprises: The length of the pole piece between the through-beam sensor and the cutter is the default cutting distance; Determining a cutting offset according to the head length, the tail length and the length of the cutting segment; The actual cutting distance is obtained according to the default cutting distance and the cutting offset.

5. The pole piece cutting method according to claim 1, characterized in that: The cutting interval is set based on a preset cutting segment distance, and the cutting segment distance includes a first cutting distance and a second cutting distance; The first cutting distance is greater than a general tab distance, and the second cutting distance is less than the general tab distance; The first cutting distance is obtained into a first interval according to the error value, and the second cutting distance is obtained into a second interval according to the error value.

6. The pole piece cutting method according to claim 5, characterized in that: The determining whether the tab spacing is within the cutting interval includes: Determining whether the tab spacing is within the first interval or the second interval; If the tab spacing is not within the first interval or the second interval, the tab spacing is not within the cutting interval; otherwise, it is within the cutting interval.

7. A pole piece cutting system, characterized in that: include: A transmission motor, a beam sensor, an encoder and a cutter, wherein the pole piece passes through the beam sensor, the encoder and the cutter via the transmission motor; The through-beam sensor is used to detect the distance between adjacent pole lugs in the pole piece in real time; The encoder is used to record the winding distance of the pole piece and determine the distance between the pole tabs according to the positions of the pole tabs; Determine whether the tab spacing is in the cutting interval, if the tab spacing is in the cutting interval, the pole piece segment corresponding to the tab spacing is the cutting segment; The cutter is used to determine the cutting operation when the cutting section reaches the cutter position according to the winding distance.

8. A pole piece cutting device, characterized in that: include: A detection module, used for obtaining the distance between adjacent pole ears in the pole piece detected in real time by the through-beam sensor; A judgment module, used to determine whether the distance between the pole tabs is in the cutting interval, and if the distance between the pole tabs is in the cutting interval, determine that the pole piece segment corresponding to the distance between the pole tabs is a cutting segment; The cutting module is used to control the cutter to cut the cutting segment when the cutting segment is wound along with the pole piece to the position of the cutter.

9. A control terminal, characterized in that: The control terminal includes a processor and a memory, the memory stores a computer program, and the processor is used to execute the computer program to implement the pole piece cutting method according to any one of claims 1 to 6.

10. A computer-readable storage medium, characterized in that: It stores a computer program, which, when executed on a processor, implements the pole piece cutting method according to any one of claims 1-6.

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