Pole piece slitting method, pole piece slitting system and battery production equipment

Abstract

The embodiment of the invention provides a pole piece slitting method, a pole piece slitting system and battery production equipment, the pole piece slitting method is used for slitting equipment, the slitting equipment comprises a rolling assembly and a slitting assembly, the rolling assembly is configured to convey pole pieces, the slitting assembly is configured to slit the pole pieces, and the slitting assembly is configured to convey the pole pieces. The pole piece slitting method comprises the steps that parameter information of a rolling assembly is obtained, wherein the parameter information comprises at least one of the rotation direction, the rotation speed, the rotation distance, the rotation time and the number of rotation turns; according to the parameter information, it is judged that rewinding happens to the pole piece, and a shutdown instruction is output so that the slitting equipment can be shut down. According to the invention, the rewinding phenomenon generated in the slitting process of the pole piece can be effectively monitored.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and more specifically, to a pole piece cutting method, a pole piece cutting system and a battery production equipment. Background Art

[0002] During the battery production process, the electrode needs to be cut into multiple parts. When starting or stopping the cutting process, due to uneven tension between the front and back of the electrode, it may move a distance in the opposite direction, that is, rewind. After rewinding, the already cut electrode may be cut again.

[0003] If the rewinding phenomenon of the electrode during the slitting process is not discovered in time, it may affect the molding quality of the electrode in the subsequent slitting operations. Summary of the invention

[0004] In view of the above problems, the present application provides a pole piece slitting method, a pole piece slitting system and a battery production equipment, which can effectively monitor the rewinding phenomenon generated by the pole piece during the slitting process.

[0005] In a first aspect, the present application provides a pole piece slitting method for a slitting device, the slitting device comprising a rolling assembly and a slitting assembly, the rolling assembly being configured to convey the pole piece, the slitting assembly being configured to slitting the pole piece, the pole piece slitting method comprising: obtaining parameter information of the rolling assembly, the parameter information comprising at least one of a rotation direction, a rotation speed, a rotation distance, a rotation time and a number of rotations; judging whether the pole piece has rewound based on the parameter information, and outputting a shutdown command to shut down the slitting device.

[0006] In some embodiments of the first aspect, by acquiring parameter information of the rolling assembly, it is possible to determine whether the pole piece has rewound and output a shutdown instruction to shut down the slitting equipment. Through the above operation, the rewinding phenomenon of the pole piece can be monitored in real time, which is also beneficial to improve the accuracy of monitoring the rewinding phenomenon.

[0007] In some embodiments, the parameter information includes a rotation direction, and the pole piece is judged to have rewound based on the parameter information, and a shutdown instruction is output to shut down the slitting device, including: judging that the pole piece has rewound based on the rotation direction being different from a preset direction.

[0008] In the above scheme, the occurrence of rewinding of the pole piece can be determined based on the rotation direction of the rolling assembly, which is easy to implement.

[0009] In some embodiments, the pole piece cutting method further includes: calculating and recording the length of the pole piece rewinding according to the parameter information.

[0010] In the above scheme, the length of the pole piece rewinding can be calculated and recorded so that subsequent operators can trace it back.

[0011] In some embodiments, the pole piece cutting method further includes: judging that the pole piece is rewound according to the parameter information, outputting an alarm instruction to send an alarm signal. This arrangement facilitates prompting the operator to check the pole piece for rewinding.

[0012] In some embodiments, the pole piece cutting method further includes: judging that the pole piece is rewound according to the parameter information, and outputting a marking instruction to mark the position where the pole piece is rewound. This arrangement allows subsequent operators to process the portion of the pole piece where the pole piece is rewound.

[0013] In some embodiments, the pole piece slitting method further includes: obtaining surface information of the position where the pole piece rewinds according to the slitting equipment being in a shutdown state; judging whether wire drawing has occurred on the pole piece according to the surface information of the position where the pole piece rewinds, and outputting a clearing instruction to clear the wire drawing on the pole piece.

[0014] In the above scheme, after the pole piece is rewound, it is possible to determine whether wire drawing has occurred on the pole piece by obtaining surface information of the position where the pole piece has been rewound, and to output instructions for clearing the wire drawing on the pole piece, so as to promptly handle the wire drawing on the pole piece, thereby preventing the wire drawing from being affected by failure to clean up in time, and thus helping to improve the molding quality of the pole piece after slitting.

[0015] In some embodiments, according to the slitting device being in a stopped state, obtaining the surface information of the pole piece rewinding position includes: photographing the position where the pole piece rewinds to obtain the surface information of the pole piece rewinding position. This arrangement can reduce the workload of operators and is also conducive to improving automated design.

[0016] In some embodiments, the pole piece slitting method further includes: after clearing the wire drawing on the pole piece, sending a start command to start the slitting equipment, after the roller assembly rotates for a preset time, sending a stop command to stop the slitting equipment, and according to the slitting equipment being in the stop state, obtaining again the surface information of the last rewinding position of the pole piece.

[0017] In the above scheme, when the pole piece that has been rewound is transported by the rolling assembly again, wire drawing may occur again. Therefore, through the above operation, the two wire drawing phenomena that may be caused by the rewinding of the pole piece can be eliminated, so as to better improve the molding quality of the pole piece after cutting.

[0018] In the second aspect, the present application provides a pole piece slitting system, comprising: a slitting device, comprising a rolling assembly and a slitting assembly, the rolling assembly being configured to convey the pole piece, and the slitting assembly being configured to slitting the pole piece; a detection device, arranged on the rolling assembly, the detection device being configured to detect parameter information of the rolling assembly, the parameter information including at least one of a rotation direction, a rotation speed, a rotation distance, a rotation time and a number of rotations; a control assembly, respectively communicatively connected to the slitting device and the detection assembly, the control assembly being configured to determine whether the pole piece is rewound and output a shutdown instruction based on the parameter information detected by the detection equipment, and the slitting device being configured to receive the shutdown instruction to shut down.

[0019] In some embodiments of the second aspect, a detection device is arranged on the rolling assembly, the detection device can detect parameter information of the rolling assembly, and can directly or indirectly send the parameter information of the rolling assembly to the control component. The control component can determine whether the pole piece is rewound based on the parameter information detected by the detection device, so as to shut down the slitting equipment, so as to effectively monitor the rewinding phenomenon of the pole piece. In addition, the operator can check whether wire drawing occurs at the position where the pole piece rewinds and clean the wire drawing, which is beneficial to improve the molding quality of the pole piece after slitting.

[0020] In some embodiments, the rolling assembly includes a first roller body, the first roller body is located upstream of the slitting assembly, the detection device is connected to the first roller body, and the pole piece forms an angle zone at the first roller body.

[0021] In the above solution, the detection device is connected to the first roller body having sufficient friction with the pole piece, which is conducive to improving the accuracy of the parameter information obtained by the detection device.

[0022] In some embodiments, the pole piece cutting system also includes a warning device, which is communicatively connected to the control component. The control component is also configured to determine whether the pole piece is rewound based on the parameter information and output an alarm instruction. The control warning device is configured to receive the alarm instruction to issue an alarm signal.

[0023] In the above scheme, when the control component determines that the pole piece is rewound according to the parameter information, it can output an alarm instruction so that the alarm device sends an alarm signal to prompt the operator.

[0024] In some embodiments, the pole piece slitting system also includes a marking device, which is communicatively connected to the control component. The control component is also configured to determine whether the pole piece has been rewound based on the parameter information and output a marking instruction. The marking device is configured to receive the marking instruction to mark the position where the pole piece has been rewound.

[0025] In the above scheme, when the control component determines that the pole piece has rewound based on the parameter information, it outputs a marking instruction to enable the marking device to mark the position where the pole piece has rewound, so that subsequent operators can process the part of the pole piece where the rewound occurred.

[0026] In some embodiments, the pole piece cutting system also includes an image acquisition device, which is communicatively connected to a control component. The control component is further configured to determine whether the pole piece has been rewound based on parameter information and output an acquisition instruction. The image acquisition device is configured to receive the acquisition instruction to obtain surface information of the position where the pole piece has been rewound.

[0027] In the above scheme, the operator can determine whether wire drawing occurs at the position where the pole piece is rewound based on the image information collected by the image acquisition device.

[0028] In some embodiments, the image acquisition device includes at least two shooting devices, at least one shooting device is arranged upstream of the slitting assembly, and at least one shooting device is arranged downstream of the slitting assembly. This arrangement is conducive to improving the accuracy of image information collected by the image acquisition device.

[0029] In a third aspect, the present application provides a battery production device, including a pole piece cutting system provided according to any embodiment of the second aspect.

[0030] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application 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 drawings without paying creative work.

[0032] Figure 1 A flow chart of a pole piece cutting method provided for some embodiments of the present application; Figure 2 A schematic diagram of a partial structure of a pole piece cutting system for cutting pole pieces provided in some embodiments of the present application; Figure 3 A flow chart of a pole piece cutting method provided for other embodiments of the present application; Figure 4 A schematic diagram of a partial structure of a pole piece cutting system for cutting pole pieces provided in other embodiments of the present application; Figure 5 A flow chart of a pole piece cutting method provided for some further embodiments of the present application.

[0033] The reference numerals of the specific embodiments are as follows: 11. Rolling assembly; 111. First roller body; 112. Second roller body; 12. Slitting assembly; 20. Detection equipment; 30. Image acquisition equipment; 31. Photographing device; 200, pole piece; 201, corner area; 202, straight area. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are 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.

[0035] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0036] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0037] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0039] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0040] The term “plurality” used in this application refers to two or more (including two).

[0041] At present, from the perspective of market development, the application of batteries is becoming more and more extensive. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of battery application areas, its market demand is also constantly expanding.

[0042] During the battery production process, the electrode needs to be cut into multiple parts. The cutting knife at the cutting point will cut the pole ears in the blank area in the center of the electrode to divide the electrode into N parts, N ≥ 2. When starting or stopping the cutting work, due to the uneven tension between the front and back of the electrode, the electrode will have a certain probability of moving in the opposite direction for a distance, which is called rewinding. After the rewinding occurs, the already cut electrode may be cut again. If the rewinding phenomenon is not monitored in time, it may affect the molding quality of the electrode in the subsequent cutting operation.

[0043] Based on the above technical problems, the present application provides a pole piece slitting method for a slitting device, the slitting device comprising a rolling assembly and a slitting assembly, the rolling assembly being configured to convey the pole piece, the slitting assembly being configured to slitting the pole piece, the pole piece slitting method comprising obtaining parameter information of the rolling assembly, the parameter information comprising at least one of a rotation direction, a rotation speed, a rotation distance, a rotation time and a number of rotations, judging whether the pole piece is rewound based on the parameter information, and outputting a shutdown command to shut down the slitting device.

[0044] By acquiring parameter information of the roller assembly, it is possible to determine whether the pole piece has rewound, so as to shut down the slitting equipment. Through the above operation, the pole piece rewinding phenomenon can be monitored in real time, which is also conducive to improving the accuracy of monitoring the rewinding phenomenon.

[0045] See also Figure 1and Figure 2 According to some embodiments of the present application, the present application provides a pole piece slitting method for a slitting device, the slitting device comprising a rolling assembly 11 and a slitting assembly 12, the rolling assembly 11 is configured to convey the pole piece 200, the slitting assembly 12 is configured to slitting the pole piece 200, and the pole piece slitting method comprises: S100, obtaining parameter information of the rolling assembly 11, the parameter information including at least one of a rotation direction, a rotation speed, a rotation distance, a rotation time, and a number of rotations; S200, judging that the pole piece 200 is rewound according to the parameter information, and outputting a shutdown instruction to stop the slitting equipment.

[0046] In the embodiment of the present application, the movement of the pole piece 200 along the preset direction can be regarded as normal tape running, and the “preset direction” refers to the length direction of the pole piece 200, such as Figure 2 As shown, the direction from the first roller 111 to the slitting assembly 12; the movement of the pole piece 200 in the direction opposite to the preset direction can be regarded as rewinding, that is, the pole piece 200 moves in the direction from the slitting assembly 12 to the first roller 111.

[0047] In step S100, parameter information of the rolling assembly 11 may be obtained through the detection device 20. Optionally, the detection device 20 may include but is not limited to at least one of an encoder and a rotary transformer. The detection device 20 is connected to the rolling assembly 11 as a whole, so as to improve the accuracy of obtaining the parameter information of the rolling assembly 11.

[0048] In step S200, the control component can determine whether the pole piece 200 is rewound according to the parameter information, and output a shutdown instruction to stop the slitting device. Specifically, the detection device 20 is connected to the control component for communication, and the detection device 20 can directly send the acquired parameter information to the control component, or the detection device 20 can also send the acquired parameter information to the control component in the form of an electrical signal. The control component determines whether the pole piece 200 is rewound according to the parameter information sent by the detection device 20 or decodes the electrical signal. If the control component determines that the pole piece 200 is rewound, it outputs a shutdown instruction to stop the slitting device and no longer perform slitting operations on the pole piece 200. Of course, if the control component determines that the pole piece 200 is not rewound, the slitting device operates normally.

[0049] The shutdown operation of the slitting device can be directly controlled by the control component. Of course, the control component can also output shutdown instructions to other control components, which control the slitting device to shut down.

[0050] The pole piece slitting method provided in some embodiments of the present application can determine whether the pole piece 200 is rewound by acquiring parameter information of the rolling assembly 11 and output a shutdown instruction to shut down the slitting equipment. Through the above steps, the rewinding phenomenon of the pole piece 200 can be monitored in real time, which is also beneficial to improve the accuracy of monitoring the rewinding phenomenon.

[0051] Through the above steps, it is possible to avoid the pole piece 200 from rewinding and failing to monitor it in time, which may cause the pole piece 200 to continue to be cut and may cause local wire drawing, thereby affecting the molding quality of the pole piece 200.

[0052] In some optional embodiments, the parameter information includes a rotation direction, and step S200 includes: According to the fact that the rotation direction is different from the preset direction, it is determined that the pole piece 200 is rewound.

[0053] The pole piece slitting method provided in some embodiments of the present application is easily implemented by determining whether the pole piece 200 is rewound according to the rotation direction of the rolling assembly 11 .

[0054] Of course, the slitting device can also be controlled to stop according to any one of the rotation speed, rotation distance, rotation time and number of rotations of the roller assembly 11.

[0055] For example, in some optional embodiments, the parameter information includes a rotation distance, and step S200 includes: According to the decreasing trend of the rotation distance, it is determined that the pole piece 200 is rewound.

[0056] In some optional embodiments, the pole piece cutting method further includes: The length of the pole piece 200 where the rewinding occurs is calculated and recorded according to the parameter information.

[0057] In the above steps, the control component can calculate and record the length of the pole piece 200 that is rewound by obtaining the parameter information of the rolling component 11. For example, the control component can calculate the length of the pole piece 200 that is rewound based on the number of rotations of the rolling component 11 and the diameter of the rolling component 11, that is, the number of meters that the pole piece 200 moves in a direction opposite to the preset direction, and record the length of the pole piece 200 that is rewound so that subsequent operators can trace it back.

[0058] Alternatively, the detection device 20 may also calculate the length of the pole piece 200 that is rewound based on the parameter information of the rolling assembly 11, and send the length value of the pole piece 200 that is rewound to the control assembly.

[0059] In some optional embodiments, the pole piece cutting method further includes: The time when the pole piece 200 is rewound and the duration of the rewinding are recorded according to the parameter information.

[0060] In the above steps, the control component can also obtain the time and duration of the pole piece 200 rewinding through the parameter information of the rolling component 11, and record the time and duration of the pole piece 200 rewinding so that subsequent operators can trace it back.

[0061] In some embodiments, the pole piece cutting method further comprises: It is determined based on the parameter information whether the pole piece 200 is rewound, and an alarm instruction is output to send out an alarm signal.

[0062] In the above steps, it is convenient to remind the operator that the pole piece 200 is rewound, and to check whether there is wire drawing. Optionally, the control component can output an alarm instruction to the alarm device, and the alarm device sends an alarm signal after receiving the alarm instruction.

[0063] In some embodiments, the pole piece cutting method further comprises: It is determined based on the parameter information whether the pole piece 200 has been rewound, and a marking instruction is output to mark the position where the pole piece 200 has been rewound.

[0064] In the above steps, it is convenient for subsequent operators to process the part of the pole piece 200 where the rewind occurs.

[0065] Optionally, when the pole piece 200 is rewound, the operator can mark the position where the pole piece 200 is rewound, or the marking device can be used to mark the position where the pole piece 200 is rewound. Specifically, the marking device is communicatively connected to the control component, and when the control component determines that the pole piece 200 is rewound according to the parameter information, the control component controls the marking device to mark the position where the pole piece 200 is rewound.

[0066] See also Figure 2 and Figure 3 In some optional embodiments, the pole piece cutting method further includes: S300, according to the slitting device being in a shutdown state, obtaining surface information of the position where the pole piece 200 is rewound; S400 , judging whether wire drawing occurs on the pole piece 200 according to the surface information of the rewinding position of the pole piece 200 , and outputting a clearing instruction to clear the wire drawing on the pole piece 200 .

[0067] In step S300, the operator can check the position where the pole piece 200 rewinds, and record or photograph the surface information of the position where the pole piece 200 rewinds, and transmit the recorded or photographed surface information to the control component.

[0068] Alternatively, the position where the pole piece 200 rewinds may be photographed by some photographing equipment. For example, the control component may control the photographing equipment to photograph the position where the pole piece 200 rewinds, and the photographing equipment sends the photographed picture or video of the surface information of the position where the pole piece 200 rewinds to the control component.

[0069] In step S400, the control component can determine whether wire drawing has occurred on the pole piece 200 based on the surface information of the rewinding position of the pole piece 200, and output a clearing instruction; of course, the control component can determine whether wire drawing has not occurred on the pole piece 200 based on the surface information of the rewinding position of the pole piece 200, and output a start instruction to start the slitting equipment.

[0070] Through the above steps, after the pole piece 200 is rewound, it can be determined whether wire drawing occurs on the pole piece 200 by obtaining surface information of the position where the pole piece 200 is rewound, and whether wire drawing occurs on the pole piece 200 at the position where the rewind occurs can be obtained in time. The control component can output a clearing instruction to clear the wire drawing produced by the pole piece 200 in time, to prevent the wire drawing from failing to be cleaned in time and affecting the quality of the pole piece 200, which is beneficial to improving the molding quality of the pole piece 200 after slitting.

[0071] Optionally, the control component can send a cleaning instruction to the cleaning device, and the cleaning device can clean the wires generated by the pole piece 200 after receiving the cleaning instruction, or the operator can clean the wires generated by the pole piece 200 according to the cleaning instruction.

[0072] In the above steps, the wiredrawing produced by the pole piece 200 can be processed in time to prevent the wiredrawing from failing to be cleaned in time and affecting the quality of the pole piece 200, which is beneficial to improving the molding quality of the pole piece 200 after slitting.

[0073] like Figure 4 As shown, in some optional embodiments, step S300 includes: The position where the pole piece 200 is rewound is photographed to obtain surface information of the position where the pole piece 200 is rewound.

[0074] In the above steps, an image acquisition device 30 can be set near the slitting component 12, and the control component controls the image acquisition device 30 to shoot the position where the pole piece 200 is rewound. The image acquisition device 30 can send the captured picture or video including the surface information of the position where the pole piece 200 is rewound to the control component.

[0075] Through the above steps, the workload of operators can be reduced and the automation design can be improved.

[0076] See also Figure 2 and Figure 5In some optional embodiments, the pole piece cutting method further includes: S500, after clearing the wire drawing on the pole piece 200, a start command is sent to start the slitting device, and after the roller assembly 11 rotates for a preset time, a stop command is sent to stop the slitting device, and according to the slitting device being in the stop state, the surface information of the last rewinding position of the pole piece 200 is obtained again.

[0077] It is understandable that when the rewound pole piece 200 is transported again by the rolling assembly 11, there is a certain probability that the pole piece 200 that has been cut will be cut again when it moves in the preset direction again, and the pole piece 200 may produce wire drawing again.

[0078] Therefore, through the above steps, the possible double wiredrawing phenomenon of the pole piece 200 caused by rewinding can be checked to eliminate the possible double wiredrawing of the pole piece 200 caused by rewinding, which is beneficial to better improve the molding quality of the pole piece 200 after slitting.

[0079] Optionally, the preset time may be 5 seconds or 10 seconds, and may be set according to actual needs.

[0080] The method for preventing the wire drawing of the pole ear provided in the embodiment of the present application can be used for cutting the pole piece 200, and can also be used in other fields that require cutting, such as the film packaging field, the food production field, etc., which is beneficial to improve the quality of the product.

[0081] See also Figure 2 According to an embodiment of the present application, a pole piece slitting system is provided, including a slitting device, a detection device 20 and a control component. The slitting device includes a rolling component 11 and a slitting component 12, the rolling component 11 is configured to convey the pole piece 200, and the slitting component 12 is configured to slitting the pole piece 200. The detection device 20 is disposed on the rolling component 11, and the detection device 20 is configured to detect parameter information of the rolling component 11, and the parameter information includes at least one of a rotation direction, a rotation speed, a rotation distance, a rotation time and a number of rotations. The control component is respectively connected to the slitting device and the detection device 20 for communication, and the control component is configured to determine whether the pole piece 200 is rewound and output a shutdown instruction according to the parameter information detected by the detection device 20, and the slitting device is configured to receive the shutdown instruction to shut down.

[0082] The slitting device is used to transport the pole piece 200 and slitting it, so that the pole piece 200 is divided into two, three, or even more after being cut by the slitting device.

[0083] The rolling assembly 11 is used to transport the pole piece 200, that is, to drive the pole piece 200 to move. The slitting assembly 12 is used to slit the pole piece 200, and the slitting assembly 12 may include but is not limited to any one of a cutting knife and a slitting laser.

[0084] The detection device 20 is used to obtain the rotation direction, rotation speed, rotation distance, rotation time or number of rotations of the rolling component 11, and can directly send the above-obtained parameter information to the control component, or can send the above-mentioned parameter information to the control component in the form of an electrical signal. The control component can determine whether the pole piece 200 is rewound based on the parameter information or decode the electrical signal.

[0085] The pole piece slitting system provided in some embodiments of the present application is characterized in that a detection device 20 is arranged on the rolling assembly 11. The detection device 20 is capable of detecting parameter information of the rolling assembly 11 and directly or indirectly sending the parameter information of the rolling assembly 11 to the control assembly. The control assembly is capable of determining whether the pole piece 200 is rewound based on the parameter information detected by the detection device 20 and outputting a shutdown instruction. The slitting equipment is capable of receiving the shutdown instruction and shutting down to effectively monitor the rewinding of the pole piece 200. In addition, the operator can check whether wire drawing occurs at the position where the pole piece 200 is rewound and clean the wire drawing, which is beneficial to improving the molding quality of the pole piece 200 after slitting.

[0086] Optionally, the detection device 20 may include an encoder, which may be specifically an incremental encoder. The encoder may convert the timing and phase relationship of the angle code disc through two photosensitive receiving tubes to encode the obtained parameter information and send it to the control component, which may decode the received data to obtain the parameter information.

[0087] For example, Figure 2 As shown, the rolling assembly 11 rotates counterclockwise, so that the pole piece 200 can move toward the slitting assembly 12 in a preset direction to be slit by the slitting assembly 12, and the encoder will continue to send a signal of parameter information of the normal tape running of the pole piece 200 to the control assembly, and the slitting equipment will operate normally; when the rotation direction of the rolling assembly 11 is clockwise, the pole piece 200 will move in a direction opposite to the preset direction, and the encoder will send a signal of parameter information of the rewinding of the pole piece 200 to the control assembly. When the control assembly receives this signal and decodes the parameter information, it determines that the pole piece is rewound and controls the slitting equipment to stop.

[0088] Optionally, the detection device 20 may further include a rotary transformer, which is a device that converts angular displacement into an electrical signal.

[0089] Optionally, the number of detection devices 20 can be set to one, two, or even more.

[0090] In some optional embodiments, the number of detection devices 20 can be set to more than two, and the rolling assembly 11 includes a plurality of roller bodies distributed at intervals, and the more than two detection devices 20 are respectively arranged on different roller bodies. This arrangement is conducive to improving the accuracy of data acquired by the detection device 20 to prevent the possibility that one of the detection devices 20 fails or otherwise fails to accurately acquire data.

[0091] In some optional embodiments, the detection device 20 is connected to one side of the rolling assembly 11 along its own axial direction, and is coaxially arranged with the rolling assembly 11 .

[0092] This arrangement helps ensure the accuracy of synchronous rotation of the detection device 20 and the rolling assembly 11, thereby improving the accuracy of data acquired by the detection device 20.

[0093] In some embodiments, at least one of the slitting device and the detection device 20 can be communicatively connected to the control component via a control signal line.

[0094] In other embodiments, a wireless transmitting module is provided in at least one of the slitting device and the detection device 20, and a wireless receiving module is provided in the control component. Specifically, the parameter information of the rolling component 11 can be transmitted to the control component by wireless transmission, and the control component can send a start or stop signal to the slitting device.

[0095] The control component may include a programmable controller PLC. Specifically, the control component may include a monitoring host, in which a controller may be provided, and the controller may specifically be a programmable controller PLC, and an operator may monitor the operation of the slitting device through the monitoring host.

[0096] Optionally, the slitting equipment may also include an unwinding device, a tension control device, a winding device, etc. The control component can control the start and stop of the slitting equipment, which can be understood as the control component being able to control the start and stop of all devices in the slitting equipment.

[0097] Please continue reading Figure 2 In some optional embodiments, the rolling assembly 11 includes a first roller body 111, the first roller body 111 is located upstream of the slitting assembly 12, the detection device 20 is connected to the first roller body 111, and the pole piece 200 forms an angle area 201 at the first roller body 111.

[0098] In the embodiment of the present application, "upstream" and "downstream" refer to the order of production sequence. For example, "upstream" means the production sequence comes first. The first roller 111 is located upstream of the slitting assembly 12. That is to say, the pole piece 200 first passes through the first roller 111 to be conveyed, and then passes through the slitting assembly 12 to be slitting.

[0099] The “angle area 201 ” means that the portions of the pole piece 200 located on both sides of the first roller body 111 are in different extension planes, that is, there is an angle between the portions of the pole piece 200 located on both sides of the first roller body 111 .

[0100] The rolling assembly 11 also includes a second roller body 112, and the pole piece 200 forms a straight area 202 at the second roller body 112. The "straight area 202" means that the parts of the pole piece 200 located on both sides of the second roller body 112 are in the same extension plane, that is, the parts of the pole piece 200 located on both sides of the second roller body 112 are arranged in parallel.

[0101] Therefore, the friction force provided by the pole piece 200 to the first roller 111 located in the angle area 201 is greater than the friction force provided by the pole piece 200 to the second roller 112 located in the straight area 202. In actual operation, the first roller 111 rotates more reliably than the second roller 112, that is, the first roller 111 is not prone to sliding with the pole piece 200.

[0102] The pole piece slitting system provided in some embodiments of the present application helps to improve the accuracy of parameter information obtained by the detection device 20 by connecting the detection device 20 to the first roller body 111 having sufficient friction with the pole piece 200.

[0103] In some optional embodiments, the pole piece slitting system also includes a warning device, which is communicatively connected to the control component. The control component is also configured to determine whether the pole piece 200 is rewound based on the parameter information and output an alarm instruction. The warning device is configured to receive the alarm instruction to issue an alarm signal.

[0104] The pole piece slitting system provided in some embodiments of the present application can output an alarm instruction when the control component determines that the pole piece 200 is rewound based on parameter information, and the alarm device can receive the alarm instruction to send an alarm signal to prompt the operator to check the slitting equipment.

[0105] In some embodiments, the warning device may be communicatively connected to the control component via a control signal line.

[0106] In other embodiments, a wireless receiving module is provided in the warning device, and a wireless transmitting module is provided in the control component. Specifically, the control component can send an alarm instruction to the warning device via wireless transmission, and the warning device sends an alarm signal after receiving the alarm instruction.

[0107] The alarm signal can be a sound signal or an image signal sent to a monitoring host.

[0108] Optionally, the warning device includes a buzzer, which may include but is not limited to any one of an electromagnetic buzzer, a piezoelectric buzzer, and the like.

[0109] Optionally, the warning device includes a speaker, and the speaker may include but is not limited to any one of a dynamic speaker, a piezoelectric speaker, a horn speaker, etc.

[0110] Optionally, the warning device includes a warning light, which may include but is not limited to any one of a CHINT warning light, an LED warning light, and the like.

[0111] In the pole piece cutting system provided in some embodiments of the present application, the warning device may adopt any one of the above-mentioned components, which is conducive to improving the flexibility of use.

[0112] In some optional embodiments, the pole piece slitting system further includes a marking device, which is communicatively connected to the control component. The control component is further configured to determine, based on parameter information, whether the pole piece 200 has been rewound and output a marking instruction. The marking device is configured to receive the marking instruction to mark the position where the pole piece 200 has been rewound.

[0113] The pole piece slitting system provided in some embodiments of the present application can output a marking instruction when the control component determines that the pole piece 200 has rewound based on parameter information, and the marking device can receive the marking instruction to mark the position where the pole piece 200 has rewound, so that subsequent operators can process the part of the pole piece 200 where the rewound occurred, and remind the next production process to focus on checking.

[0114] Optionally, the marking device can mark the pole piece 200 by labeling, rolling, stamping, or air spraying.

[0115] Optionally, a marking device is provided downstream of the slitting assembly 12, which is capable of marking the portion of the pole piece 200 that has been slit.

[0116] See also Figure 2 and Figure 4 In some optional embodiments, the pole piece slitting system further includes an image acquisition device 30, which is communicatively connected to the control component. The control component is further configured to determine whether the pole piece 200 is rewound based on the parameter information and output an acquisition instruction. The control image acquisition device 30 is configured to receive the acquisition instruction to obtain surface information of the position where the pole piece 200 is rewound.

[0117] The image acquisition device 30 can receive acquisition instructions and be used to acquire surface information of the pole piece 200 located at the slitting device, and transmit the surface information to the control component.

[0118] In the pole piece slitting system provided in some embodiments of the present application, the operator can judge whether wire drawing occurs at the position where the pole piece 200 is rewound based on the surface information collected by the image acquisition device 30, so as to prompt that the pole piece 200 needs to be processed due to wire drawing, to prevent the wire drawing from not being cleaned in time and affecting the quality of the pole piece 200, which is beneficial to improving the molding quality of the pole piece 200 after slitting. In addition, by setting up the image acquisition device 30, it is beneficial to improve the automation design of the pole piece slitting system to reduce the work difficulty of the operator.

[0119] In some embodiments, the image acquisition device 30 may be communicatively connected to the control component via a control signal line.

[0120] In other embodiments, the image acquisition device 30 may also be connected to the control component in a wireless communication manner.

[0121] The image acquisition device 30 can constantly acquire the surface information of the pole piece 200 located at the slitting device, or, in some optional embodiments, the control component is further configured to control the start and stop of the image acquisition device 30 .

[0122] By configuring in the above manner, the image acquisition device 30 can acquire the surface information of the pole piece 200 located at the slitting device according to the instruction of the control component, which is beneficial to saving costs and avoiding waste.

[0123] Specifically, when the pole piece 200 moves in a preset direction, the image acquisition device 30 always remains in a closed state. When the pole piece 200 moves in a direction opposite to the preset direction, the first roller 111 rotates in the opposite direction. The control component determines that the pole piece 200 is rewound through the parameter information sent by the detection device, and controls the image acquisition device 30 to turn on to collect surface information of the pole piece 200 located at the slitting device and send it to the control component.

[0124] Optionally, the control component may also be configured to set parameters such as the frame rate and resolution of the image acquisition device 30 .

[0125] Optionally, the control component may also be configured to set the aperture, shutter speed, and gain of the image acquisition device 30 according to actual image acquisition effects.

[0126] like Figure 4 As shown, in some optional embodiments, the image acquisition device 30 includes at least two shooting devices 31, at least one shooting device 31 is arranged upstream of the slitting component 12, and at least one shooting device 31 is arranged downstream of the slitting component 12.

[0127] The pole piece slitting system provided in some embodiments of the present application is configured in the above manner, which is beneficial to improving the accuracy of the image information of the pole piece 200 located at the slitting device captured by the image acquisition device 30.

[0128] The number of the photographing devices 31 can be two, three, or even more. The photographing devices 31 can include but are not limited to any one of a CCD (Charge coupled Device) camera, a mobile phone camera, a video camera, and the like.

[0129] Optionally, the photographing device 31 is configured as a CCD camera. CCD is a semiconductor device that can convert optical images into digital signals, and has the advantages of being small in size, light in weight, unaffected by magnetic fields, and resistant to vibration and impact. This configuration is helpful to improve the accuracy of the collected surface information of the pole piece 200 at the rewind position.

[0130] like Figure 4 As shown, as an example, two shooting devices 31 are arranged upstream of the slitting component 12, and one of the shooting devices 31 is located above the pole piece 200 along the thickness direction thereof, wherein the other shooting device 31 is located below the pole piece 200 along the thickness direction thereof, and two shooting devices 31 are arranged downstream of the slitting component 12, and one of the shooting devices 31 is located above the pole piece 200 along the thickness direction thereof, wherein the other shooting device 31 is located below the pole piece 200 along the thickness direction thereof.

[0131] In some optional embodiments, the pole piece slitting system further includes a cleaning device, which is communicatively connected to a control component. The control component is further configured to determine whether wire drawing occurs on the pole piece 200 based on surface information of a rewinding position of the pole piece 200, and to control the cleaning device to clean the wire drawing produced on the pole piece 200.

[0132] The control component can determine whether wire drawing occurs on the pole piece 200 based on the image information of the rewinding position of the pole piece 200. If wire drawing occurs on the pole piece 200, a cleaning instruction is output to the cleaning device. After receiving the cleaning instruction, the cleaning device can clean the wire drawing generated on the pole piece 200.

[0133] The pole piece slitting system provided in some embodiments of the present application is arranged in the above manner, and can clean the wire drawing in time to prevent the wire drawing from flowing out and affecting the overall quality of the pole piece 200, which is beneficial to improving the molding quality of the pole piece 200 after slitting. In addition, by setting up a cleaning device, it is beneficial to improve the automation design of the pole piece slitting system to reduce the work difficulty of the operator.

[0134] Optionally, the cleaning device may include a clamp, a suction cup, etc. to clean the wires on the pole piece 200 .

[0135] The pole piece cutting system provided in the embodiment of the present application can be used in the field of battery technology to cut pole pieces 200. Of course, it can also be used in other fields that require cutting, such as film packaging, food production, etc., which is beneficial to improving product quality.

[0136] In some optional embodiments, the slitting device may further include a frame, and the rolling assembly 11, the slitting assembly 12, the image acquisition device 30 and the marking device may all be installed on the frame.

[0137] According to some embodiments of the present application, the present application provides a battery production equipment, including the pole piece cutting system provided by any of the above embodiments, which is beneficial to improving the quality of the battery.

[0138] Please also read Figure 2 and Figure 4 The present application embodiment provides a pole piece cutting system, including a cutting device, a detection device 20, a control component, a warning device, a marking device, and an image acquisition device 30. The slitting equipment includes a rolling assembly 11 and a slitting assembly 12. The rolling assembly 11 includes a first roller body 111 located upstream of the slitting assembly 12. The pole piece 200 forms an angle area 201 at the first roller body 111. The rolling assembly 11 is configured to convey the pole piece 200, and the slitting assembly 12 is configured to slitting the pole piece 200.

[0139] The detection device 20 includes an encoder, which is connected to the first roller body 111 and is configured to detect parameter information of the rolling assembly 11 , wherein the parameter information includes at least one of a rotation direction, a rotation speed, a rotation distance, a rotation time, and a number of rotations.

[0140] The control component is respectively connected to the slitting device, the detection device 20, the warning device, the marking device, and the image acquisition device 30 for communication. The control component is configured to determine whether the pole piece 200 has rewound based on the parameter information detected by the detection device 20, control the slitting device to stop, control the warning device to send an alarm signal, control the marking device to mark the position where the pole piece 200 has rewound, and control the image acquisition device 30 to obtain the surface information of the position where the pole piece 200 has rewound.

[0141] Please also read Figures 1 to 5 The present application also provides a pole piece cutting method, which is used in the pole piece cutting system provided in any of the above embodiments. The pole piece cutting method includes: Obtain parameter information of the rolling assembly 11 through an encoder, the parameter information including rotation direction, rotation speed, rotation distance, rotation time and number of rotations; The control component determines that the pole piece 200 is rewound according to the fact that the rotation direction is different from the preset direction, and the control component outputs a stop command to stop the slitting device, outputs an alarm command to make the warning device send an alarm signal, and outputs a marking command to make the marking device mark the position where the pole piece 200 is rewound. The control component calculates and records the length of the pole piece 200 that is rewound according to the parameter information; According to the slitting device being in a stopped state, the control component outputs a collection instruction, so that the image acquisition device 30 takes a picture of the position where the pole piece 200 is rewound, so as to obtain the surface information of the position where the pole piece 200 is rewound; The control component determines whether the pole piece 200 has wire drawing according to the surface information of the rewinding position of the pole piece 200, and outputs a clearing instruction to clear the wire drawing on the pole piece 200; After clearing the wire drawing on the pole piece 200, the control component sends a start command to start the slitting device. After the roller component 11 rotates for a preset time, it sends a stop command to stop the slitting device. According to the slitting device being in the stop state, the surface information of the last rewinding position of the pole piece 200 is obtained again.

[0142] It is understandable that after the pole piece 200 is rewound, there is a certain probability that the pole ear that has been cut will be cut once, resulting in pole ear wire drawing. The pole ear wire drawing cannot be effectively detected in the process after cutting, and there is a great risk of missing it. Its involvement in the battery cell can easily lead to the risk of lithium deposition and thermal runaway in the battery cell.

[0143] Therefore, effectively monitoring whether the pole piece 200 is rewound during the slitting process is the basis for effectively detecting and removing the pole ear wiredrawing. The pole piece slitting method provided in some embodiments of the present application can not only effectively monitor the pole piece 200 rewinding during the slitting process, but also further clean the pole ear wiredrawing caused by the pole piece 200 rewinding to prevent the pole ear wiredrawing from flowing out and damaging the molding quality of the pole piece 200 after slitting.

[0144] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0145] If there is no special explanation, all steps of the present application can be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), which means that the method may include steps (a) and (b) performed sequentially, or may include steps (b) and (a) performed sequentially. For example, it is mentioned that the method may also include step (c), which means that step (c) can be added to the method in any order. For example, the method may include steps (a), (b) and (c), or may include steps (a), (c) and (b), or may include steps (c), (a) and (b), etc.

[0146] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for cutting a pole piece, used in a cutting device, the cutting device comprising a rolling assembly and a cutting assembly, the rolling assembly being configured to convey the pole piece, the cutting assembly being configured to cut the pole piece, characterized in that: The pole piece cutting method comprises: Obtain parameter information of the roller assembly, the parameter information including at least one of a rotation direction, a rotation speed, a rotation distance, a rotation time, and a number of rotations; According to the parameter information, it is determined that the pole piece is rewinding, and a shutdown command is output to stop the slitting device.

2. The pole piece cutting method according to claim 1, characterized in that: The parameter information includes a rotation direction, the determination of the pole piece rewinding based on the parameter information, and outputs a shutdown instruction to shut down the slitting device, including: According to the rotation direction and the preset direction, it is determined that the pole piece rewinding occurs.

3. The pole piece cutting method according to claim 1, characterized in that: The pole piece cutting method further comprises: Based on the parameter information, the length of the pole piece rewinding occurs and is calculated and recorded.

4. The pole piece cutting method according to claim 1, characterized in that: The pole piece cutting method further comprises: According to the parameter information, it is determined that the pole piece is rewinding, and an alarm command is output to issue an alarm signal.

5. The pole piece cutting method according to claim 1, characterized in that: The pole piece cutting method further comprises: According to the parameter information, it is determined that the pole piece rewinding occurs, and a marking instruction is output to mark at the position where the pole piece rewinding occurs.

6. The pole piece cutting method according to claim 1, characterized in that: The pole piece cutting method further comprises: According to the slitting device being in a shutdown state, surface information of the position where the pole sheet rewinding occurs is obtained; According to the surface information of the rewinding position of the pole sheet, it is determined that the pole sheet has been wired, and a clearing command is output to clear the wired on the pole sheet.

7. The pole piece cutting method according to claim 6, characterized in that: According to the slitting device being in a shutdown state, the surface information of the pole rewinding position is obtained, including: The position where the pole film is rewinding is photographed to obtain surface information of the position where the pole film is rewinding.

8. The pole slitting method according to claim 6, characterized in that The pole piece cutting method further comprises: After clearing the wire drawing on the pole piece, a start command is sent to start the slitting device. After the roller assembly rotates for a preset time, a stop command is sent to stop the slitting device. According to the slitting device being in the stop state, the surface information of the last rewinding position of the pole piece is obtained again.

9. A pole piece cutting system, characterized in that: include: A slitting device includes a roller actuating assembly and a slitting assembly configured to convey a pole piece, and the slitting assembly configured to cut the pole piece; A detection device, disposed on the rolling assembly, the detection device being configured to detect parameter information of the rolling assembly, the parameter information including at least one of a rotation direction, a rotation speed, a rotation distance, a rotation time, and a number of rotations; A control component is respectively communicatively connected to the slitting device and the detection device. The control component is configured to determine whether the pole piece is rewound based on the parameter information detected by the detection device and output a shutdown instruction. The slitting device is configured to receive the shutdown instruction to shut down.

10. The pole slitting system of claim 9, characterized in that The rolling assembly comprises a first roller body, the first roller body is located upstream of the slitting assembly, the detection device is connected to the first roller body, and the pole piece forms an angled area at the first roller body.

11. The pole slitting system according to claim 9 or 10, characterized in that The electrode slitting system also includes a warning device, which is communicatively connected to the control component. The control component is also configured to determine whether the electrode is rewound based on the parameter information and output an alarm instruction. The warning device is configured to receive the alarm instruction to issue an alarm signal.

12. The pole slitting system according to claim 9 or 10, characterized in that The pole piece cutting system also includes a marking device, which is communicatively connected to the control component. The control component is also configured to determine whether the pole piece is rewound based on the parameter information and output a marking instruction. The marking device is configured to receive the marking instruction to mark the position where the pole piece is rewound.

13. The pole slitting system according to claim 9 or 10, characterized in that The pole piece cutting system also includes an image acquisition device, which is communicatively connected to the control component. The control component is also configured to determine whether the pole piece is rewound based on the parameter information and output an acquisition instruction. The image acquisition device is configured to receive the acquisition instruction to obtain surface information of the position where the pole piece is rewound.

14. The pole slitting system of claim 13, characterized in that The image acquisition device includes at least two shooting devices, at least one of the shooting devices is arranged upstream of the slitting component, and at least one of the shooting devices is arranged downstream of the slitting component.

15. A battery production device, characterized in that: Comprising a pole piece cutting system according to any one of claims 9 to 14.

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