Die-cutting system and method

Abstract

A die-cutting system (1), comprising a controller (11), a visual inspection device (12), an upper computer (13), an input / output board (14) and a cutting device (15); the visual inspection device is used for, when image information of an electrode sheet of a current unit length is acquired, generating by means of the input / output board a frame signal of the end of image acquisition for the electrode sheet of the current unit length, sending the frame signal to the controller, and sending the image information to the upper computer; the upper computer is used for generating die-cutting operation coding information on the basis of the image information, and sending the die-cutting operation coding information to the controller; the controller is used for generating first serial number information of the electrode sheet of the current unit length on the basis of the frame signal, using the first serial number information to verify second serial number information recorded in the die-cutting operation coding information when the die-cutting operation coding information is received, and when the verification succeeds, determining, on the basis of quality information in the die-cutting operation coding information, whether to perform die-cutting on the electrode sheet of the current unit length when the electrode sheet of the current unit length reaches the cutting device. Also provided is a die-cutting method applied to the die-cutting system.

Description

Die cutting system and method

[0001] Cross-reference to related applications

[0002] The present disclosure is based on and claims priority to Chinese Patent Application No. 202411087186.9, filed on August 8, 2024, entitled “Die cutting system and method”, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of batteries, and in particular to a die cutting system and method. BACKGROUND

[0004] The production of batteries involves a die cutting process, and in a high-speed die cutting process, there can be a situation of incorrect matching or loss of signals, so that it is not possible to accurately determine whether to perform a skip cutting on the pole piece, greatly affecting the accuracy and reliability of the die cutting process. That is, how to improve the accuracy and reliability of die cutting is a problem that needs to be solved at present. SUMMARY

[0005] The present disclosure provides a die cutting system and method that can effectively improve the accuracy and reliability of die cutting.

[0006] The technical solution of the embodiments of the present disclosure is as follows:

[0007] In a first aspect, the present disclosure provides a die cutting system, comprising a controller, a visual detection device, an input-output board card, a cutting device, and an upper computer.

[0008] The visual detection device is configured to generate a frame signal indicating that the image acquisition of the current unit length of the pole piece is complete through the input-output board card when the image information of the current unit length of the pole piece is acquired, and send the frame signal to the controller and the image information to the upper computer.

[0009] The upper computer is configured to generate die cutting operation encoding information according to the image information, and send the die cutting operation encoding information to the controller.

[0010] The controller is configured to generate first serial number information of the current unit length of the pole piece according to the frame signal, and verify second serial number information recorded in the die cutting operation encoding information by using the first serial number information when the die cutting operation encoding information is received. When the verification is passed, the controller is configured to determine whether to perform die cutting on the current unit length of the pole piece according to quality information in the die cutting operation encoding information when the current unit length of the pole piece reaches the cutting device.

[0011] In the embodiment, the vision detection device can be used to capture the pole piece of unit length, and when the image information of the current unit length of pole piece is obtained, the frame signal is generated through the input and output board card, the frame signal is sent to the controller to indicate that the image information of the current unit length of pole piece is obtained, and the image information is sent to the upper computer, so that the controller generates the first serial number information of the current unit length of pole piece in response to the frame signal, and when the die cutting operation coding information generated by the upper computer according to the image information is received, the die cutting operation coding information is checked by using the first serial number information to determine whether the die cutting operation coding information is the coding information corresponding to the current unit length of pole piece. In this way, the coding information indicating the die cutting operation of the current unit length of pole piece can be correctly matched before the die cutting operation of the current unit length of pole piece is performed, so that when it is determined that the die cutting operation coding information is the coding information corresponding to the current unit length of pole piece, it is determined whether the current unit length of pole piece is die cut according to the quality information in the die cutting operation coding information, which can greatly improve the accuracy and reliability of the die cutting.

[0012] In some embodiments of the present disclosure, the controller is further configured to perform counting based on the frame signal to obtain the first serial number information, and compare the first serial number information with the second serial number information to complete the checking, and generate corresponding first serial number information for each unit length of pole piece based on the received frame signal.

[0013] In the embodiment, the first serial number information is the serial number information of the current unit length of pole piece generated by the controller by counting the frame signal, so that when the upper computer sends the die cutting operation coding information to the controller for checking, the controller can determine whether the die cutting operation coding information is the die cutting operation coding information corresponding to the current unit length of pole piece by comparing the first serial number information with the second serial number information, thereby improving the accuracy of the checking.

[0014] In some embodiments of the present disclosure, the upper computer is further configured to perform pole piece defect detection on the image information to obtain the quality information.

[0015] The controller is further configured to control the cutting device to cut the tab of the current unit length of pole piece when the quality information indicates that the current unit length of pole piece has no defect, and control the cutting device to perform skip cutting on the current unit length of pole piece when the quality information indicates that the current unit length of pole piece has a defect.

[0016] In the embodiment, the quality information can be used to represent the quality condition of the current unit length of the pole piece; and when the controller receives the die cutting operation coding information, the cutting device can be controlled to cut the tab of the current unit length of the pole piece when the quality information represents that the current unit length of the pole piece has no defects, and the cutting device can be controlled to perform skip cutting on the current unit length of the pole piece, that is, not to cut the tab, when the quality information represents that the current unit length of the pole piece has defects, so that accurate die cutting control can be performed on the current unit length of the pole piece, and the reliability of die cutting is improved.

[0017] In some embodiments of the present disclosure, the visual detection device includes a first detection device and a second detection device.

[0018] The first detection device is configured to capture the first surface of the current unit length of the pole piece to obtain first image information.

[0019] The second detection device is configured to capture the second surface of the current unit length of the pole piece to obtain second image information; wherein the first surface and the second surface are two different surfaces of the pole piece.

[0020] The input / output board is configured to generate a frame signal indicating that the first image information acquisition of the current unit length of the pole piece is completed and a frame signal indicating that the second image information acquisition is completed.

[0021] In the embodiment, two detection devices can be arranged to capture the front and back surfaces of the current unit length of the pole piece, so that the upper computer can generate two die cutting operation coding information according to the image information of the two surfaces of the current unit length of the pole piece, and send the two die cutting operation coding information to the controller for subsequent verification, so as to improve the reliability of die cutting.

[0022] In some embodiments of the present disclosure, the controller is further configured to determine that the current unit length of the pole piece has no defects when the first surface has no defects according to the first quality information in the first die cutting operation coding information and the second surface has no defects according to the second quality information in the second die cutting operation coding information; otherwise, it is determined that the current unit length of the pole piece has defects.

[0023] In the embodiment, when the quality information in the die cutting operation coding information corresponding to the two surfaces of the current unit length of the pole piece, the first quality information and the second quality information all have no defects, that is, the two surfaces of the current unit length of the pole piece all have no defects, it can be determined that the current unit length of the pole piece has no defects, so that accurate detection of the quality of the current unit length of the pole piece can be realized.

[0024] In some embodiments of the present disclosure, the controller is further configured to compare the first sequence number information and the second sequence number information, and determine that the check result is a check pass in a case where the first sequence number information is identical to the second sequence number information; and determine that the check result is a check fail in a case where the first sequence number information is different from the value of the first coded bit.

[0025] In the present embodiment, the controller can compare the first sequence number information and the second sequence number information, and determine that the die-cutting operation coding information is the coding information corresponding to the current unit length of the pole piece in a case where the first sequence number information is identical to the second sequence number information, i.e., a check pass, and determine that the die-cutting operation coding information is not the coding information corresponding to the current unit length of the pole piece in a case where the first sequence number information is different from the second sequence number information, i.e., a check fail, thereby completing the check of the die-cutting operation coding information and improving the accuracy of information interaction in the die-cutting process.

[0026] In some embodiments of the present disclosure, the controller is further configured to obtain position information of the current unit length of the pole piece, and control the cutting device to perform die-cutting or kiss-cutting on the current unit length of the pole piece in a case where it is determined according to the position information that the current unit length of the pole piece reaches a preset region.

[0027] In the present embodiment, the controller can determine whether the current unit length of the pole piece reaches the region where the cutting device is located by obtaining the position information of the current unit length of the pole piece, and then perform die-cutting or kiss-cutting on the current unit length of the pole piece when it is determined that the current unit length of the pole piece reaches the region where the cutting device is located, thereby improving the accuracy of die-cutting.

[0028] In some embodiments of the present disclosure, the controller is further configured to obtain a transportation distance of the current unit length of the pole piece, and control the cutting device to perform die-cutting or kiss-cutting on the current unit length of the pole piece in a case where it is determined that the transportation distance reaches a preset distance.

[0029] In the present embodiment, the controller can further determine whether the current unit length of the pole piece reaches the cutting device by obtaining the transportation distance of the current unit length of the pole piece when performing kiss-cutting on the current unit length of the pole piece, wherein the distance to the cutting device can be a preset distance, thereby controlling the cutting device to perform die-cutting or kiss-cutting on the current unit length of the pole piece when it is determined that the transportation distance reaches the preset distance, and improving the accuracy of kiss-cutting control.

[0030] In some embodiments of the present disclosure, the host computer is further configured to obtain length information of the image information, and determine difference information between the length information and the unit length parameter; and send an alarm prompt information to the controller in a case where the difference information is greater than a preset difference.

[0031] The controller is further configured to perform alarm processing in response to the alarm prompt information.

[0032] In the embodiment, the host computer determines whether the length of the captured image information meets the preset requirement by acquiring length information of the image information, comparing difference information between the length information and the unit length parameter with a preset difference, so as to instruct the controller to perform alarm in the case of not meeting the requirement, to prompt that the shooting of the current visual detection device does not meet the requirement, and to improve the accuracy of the shooting operation.

[0033] In the second aspect, the disclosure provides a die-cutting method. When the visual detection device acquires image information of the current unit length of the pole piece, the visual detection device generates a frame signal indicating that the image acquisition of the current unit length of the pole piece is completed through the input-output board card, and sends the frame signal to the controller and the image information to the host computer.

[0034] The controller generates first serial number information of the current unit length of the pole piece according to the frame signal, and checks second serial number information recorded in the die-cutting operation coding information by using the first serial number information when receiving die-cutting operation coding information generated by the host computer according to the image information.

[0035] The controller confirms whether the current unit length of the pole piece is die-cut according to quality information in the die-cutting operation coding information when the current unit length of the pole piece reaches the cutting device in the case of passing the check.

[0036] In the embodiment, the visual detection device can be used to shoot the unit length of the pole piece, and when the image information of the current unit length of the pole piece is acquired, the frame signal is generated through the input-output board card and sent to the controller to indicate that the image information of the current unit length of the pole piece is acquired, and the image information is sent to the host computer, so that the controller generates first serial number information of the current unit length of the pole piece in response to the frame signal, and checks the die-cutting operation coding information by using the first serial number information when receiving the die-cutting operation coding information generated by the host computer according to the image information, to determine whether the die-cutting operation coding information is the coding information corresponding to the current unit length of the pole piece. In this way, the coding information indicating the die-cutting operation of the current unit length of the pole piece can be correctly matched before the die-cutting operation of the current unit length of the pole piece is performed, so that when it is determined that the die-cutting operation coding information is the coding information corresponding to the current unit length of the pole piece, whether the current unit length of the pole piece is die-cut according to the quality information in the die-cutting operation coding information, which greatly improves the accuracy and reliability of the die-cutting.

[0037] In some embodiments of the disclosure, the method comprises:

[0038] The controller compares the first serial number information and the second serial number information;

[0039] In a case where it is determined that the first serial number information is same as the second serial number information, it is determined that the check result is a check pass;

[0040] In a case where it is determined that the first serial number information is different from the second serial number information, it is determined that the check result is a check fail.

[0041] In the embodiment, the controller can compare the first serial number information and the second serial number information, and in a case where the first serial number information is same as the second serial number information, it is determined that the die-cutting operation coding information is the coding information corresponding to the current unit length of the pole piece, i.e. a check pass, and in a case where the first serial number information is different from the value of the first coding bit, it is determined that the die-cutting operation coding information is not the coding information corresponding to the current unit length of the pole piece, i.e. a check fail, thereby completing the check of the die-cutting operation coding information and improving the accuracy of information interaction in the die-cutting process. BRIEF DESCRIPTION OF DRAWINGS

[0042] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of preferred embodiments and are not meant to limit the present disclosure.

[0043] FIG. 1 is a schematic diagram of the composition structure of a die-cutting system according to an embodiment of the present disclosure;

[0044] FIG. 2 is a schematic diagram of the composition structure of a die-cutting system according to an embodiment of the present disclosure;

[0045] FIG. 3 is a schematic diagram of the composition structure of a visual detection device according to an embodiment of the present disclosure;

[0046] FIG. 4 is a schematic diagram of the implementation process of a die-cutting method according to an embodiment of the present disclosure;

[0047] FIG. 5 is a schematic diagram of the implementation process of a die-cutting method according to an embodiment of the present disclosure;

[0048] FIG. 6 is a schematic diagram of the implementation process of a die-cutting method according to an embodiment of the present disclosure;

[0049] FIG. 7 is a schematic diagram of the implementation of a die-cutting method according to an embodiment of the present disclosure;

[0050] FIG. 8 is a schematic diagram of the implementation process of a die-cutting method according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings in the embodiments of the present disclosure. It can be understood that the specific embodiments described herein are only used to explain the related application, and not to limit the application. In addition, it should be noted that, for the convenience of description, only the parts related to the application are shown in the drawings.

[0052] New energy batteries are increasingly widely used in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also increasingly used in energy storage fields and the like. New energy batteries are not only applied to energy storage power supply systems such as hydroelectric, thermal, wind and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric vehicles and electric transportation tools, and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also increasing.

[0053] In the production process of the battery, a die cutting process is involved. In the high-speed die cutting process, there may be a situation of incorrect matching or loss of signals, so that it is not possible to accurately determine whether to perform a jump cutting on the pole piece, greatly affecting the accuracy and reliability of the die cutting process.

[0054] In order to solve the problems existing in the current die cutting method, the die cutting system in the present disclosure can include a controller, a visual detection device input / output board card, a cutting device and an upper computer. The visual detection device is used to generate a frame signal of the end of the current unit length of the pole piece image acquisition under the condition that the image information of the current unit length of the pole piece is obtained, and sends the frame signal to the controller, and sends the image information to the upper computer. The upper computer is used to generate die cutting operation coding information according to the image information, and sends the die cutting operation coding information to the controller. The controller is used to generate the first serial number information of the current unit length of the pole piece according to the frame signal, and checks the second serial number information recorded in the die cutting operation coding information by using the first serial number information under the condition that the die cutting operation coding information is received. In the case where the check is passed, it is confirmed according to the quality information in the die cutting operation coding information whether to perform die cutting on the current unit length of the pole piece under the condition that the current unit length of the pole piece reaches the cutting device, effectively improving the accuracy and reliability of the die cutting.

[0055] The technical solutions in the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings in the embodiments of the present disclosure.

[0056] An embodiment of the present disclosure provides a die cutting system. As shown in FIG. 1, the die cutting system 1 can include a controller 11, a visual detection device 12, an upper computer 13, an input / output board card 14 and a cutting device 15.

[0057] In embodiments of the present disclosure, the die cutting refers to the operation of cutting the tabs of the electrode sheet of the battery; the battery can be assembled from one or more battery cells; the battery can be a battery monomer. The battery monomer refers to a basic unit capable of realizing mutual conversion between chemical energy and electrical energy, and can be used to make a battery module or a battery pack, thereby being used to supply power to an electrical device. The battery monomer can be a secondary battery, which refers to a battery monomer that can be activated by charging after discharging. The battery monomer can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., and embodiments of the present disclosure are not limited thereto.

[0058] In embodiments of the present disclosure, the battery can also be a single physical module including one or more battery monomers to provide higher voltage and capacity. When there are multiple battery monomers, the multiple battery monomers are connected in series, in parallel, or in a hybrid connection through a bus member.

[0059] In embodiments of the present disclosure, the visual detection device 12 can be connected to the controller 11 and the host computer 13, respectively.

[0060] The visual detection device 12 can be used to generate a frame signal indicating the end of image acquisition of the current unit length of the electrode sheet through an input / output (I / O) board card when the image information of the current unit length of the electrode sheet is acquired, and send the frame signal to the controller and send the image information to the host computer.

[0061] In embodiments of the present disclosure, the visual detection device 12 can be any device capable of visual detection and shooting, for example, the visual detection device 12 can be a charge-coupled device (CCD) device.

[0062] In embodiments of the present disclosure, the controller 11 can be a programmable logic controller (PLC) with a microprocessor for automatic control, which can load control instructions into memory for storage and execution at any time.

[0063] In embodiments of the present disclosure, as shown in FIG. 2, the die cutting system 1 can further include a unwinding device 16, which can be used to unwind the wound electrode sheet, and then the electrode sheet passes through the visual detection device 12 for shooting by the visual detection device 12; in addition, the die cutting system can further include a plurality of conveying rollers for stabilizing the conveying of the electrode sheet; wherein a conveying roller 171 can be arranged near the visual detection device, and a conveying roller 172 can be arranged near the cutting device.

[0064] In the embodiments of the present disclosure, the specific numerical value of the unit length is not limited in the present disclosure, for example, the unit length can be x centimeters, so that the visual detection device 12 can capture a section of x centimeters of the unwound pole piece to obtain image information; that is, the length range of each capture of the visual detection device 12 is x centimeters, and each capture can obtain the image information corresponding to the x centimeters of the pole piece.

[0065] In the embodiments of the present disclosure, the input and output board can be used to generate a frame signal and send the frame signal to the controller to indicate that the controller has currently acquired the image information in the case that the visual detection device captures the image information of the current unit length of the pole piece each time.

[0066] In some embodiments of the present disclosure, as shown in FIG. 3, the visual detection device 12 can include a first detection device 121 and a second detection device 122.

[0067] The first detection device 121 can be used to capture the first surface of the current unit length of the pole piece to obtain first image information.

[0068] The second detection device 122 can be used to capture the second surface of the current unit length of the pole piece to obtain second image information.

[0069] In the embodiments of the present disclosure, the first surface and the second surface are two different surfaces of the pole piece.

[0070] For example, the first surface can be the front surface of the pole piece, and the second surface can be the back surface of the pole piece, so that the first detection device 121 can be used to capture the front surface of the current unit length of the pole piece to obtain the image information of the front surface of the current unit length of the pole piece, that is, the first image information; and the second detection device 122 can be used to capture the back surface of the current unit length of the pole piece to obtain the image information of the back surface of the current unit length of the pole piece, that is, the second image information.

[0071] The host computer 13 can be used to generate die cutting operation encoding information according to the image information, and send the die cutting operation encoding information to the controller.

[0072] In the embodiments of the present disclosure, the die cutting operation encoding information can be used to indicate the execution of the die cutting operation, including executing die cutting and executing skip cutting, wherein the die cutting means normally executing the cutting of the pole lug; and the skip cutting means skipping this section of the pole piece and not executing the cutting of the pole lug on this section of the pole piece.

[0073] In some embodiments of the present disclosure, the host computer 13 can also be used to generate second serial number information of the current unit length of the pole piece according to the image information, and generate die cutting operation encoding information based on the second serial number information.

[0074] In embodiments of the present disclosure, the second serial number information represents information generated by the host computer 13 for identifying the current unit length of pole piece.

[0075] Illustratively, the visual detection device captures the image of the pole piece, and after obtaining the image information of the third section of pole piece, sends the image information of the third section of pole piece to the host computer. The host computer determines that the current image information is the third image information by counting the received image information, that is, it can be determined that the current unit length of pole piece corresponding to the current image information is the third section of pole piece, so that the second serial number information corresponding to the current unit length of pole piece can be determined as 3.

[0076] In embodiments of the present disclosure, the die cutting operation encoding information can include the second serial number information and the quality information.

[0077] In some embodiments of the present disclosure, the host computer 13 can also be configured to perform pole piece defect detection on the image information to obtain the quality information, and generate the die cutting operation encoding information according to the quality information.

[0078] In embodiments of the present disclosure, the quality information can be used to indicate the quality condition of the current unit length of pole piece.

[0079] In embodiments of the present disclosure, the quality condition can include two conditions of presence of defect and absence of defect. The form of the defect is not limited in the present disclosure, for example, the possible defects on the pole piece include foreign matter, scratches, scratches, etc.

[0080] In embodiments of the present disclosure, the representation form of the quality information is not limited in the present disclosure, illustratively, different quality conditions of the current unit length of pole piece can be represented by different numerical values or letters; for example, the absence of defect can be represented by the numerical value 1, and the presence of defect can be represented by the numerical value 0.

[0081] In some embodiments of the present disclosure, the host computer 13 can also be configured to perform pole piece defect detection on the image information to obtain the quality information.

[0082] The controller 11 can be configured to generate the first serial number information of the current unit length of pole piece according to the frame signal, and when receiving the die cutting operation encoding information, use the first serial number information to verify the second serial number information recorded in the die cutting operation encoding information, and when the verification is passed, confirm whether to perform die cutting on the current unit length of pole piece when the current unit length of pole piece reaches the cutting device according to the quality information in the die cutting operation encoding information.

[0083] In the embodiments of the present disclosure, the first serial number information represents the information generated by the controller for identifying the current unit length of the pole piece, therefore, the controller can determine whether the die cutting operation encoding information currently sent by the host computer is the encoding information of the current unit length of the pole piece corresponding to the first serial number information by comparing the second serial number information in the die cutting operation encoding information and the first serial number information.

[0084] In some embodiments of the present disclosure, the controller 11 can also be configured to perform counting processing based on the frame signal to obtain the first serial number information, and compare the first serial number information with the second serial number information to complete the verification, and generate corresponding first serial number information for each unit length of the pole piece based on the frame signal received.

[0085] For example, the controller receives the fourth frame signal, and the counting value is 4, and then the first serial number information can be determined as 4.

[0086] In some embodiments of the present disclosure, when the visual detection device includes a first detection device and a second detection device, the frame signal can include a first signal and a second signal, the first signal representing the frame signal emitted by the input / output board card corresponding to the first detection device, and the second signal representing the frame signal emitted by the input / output board card corresponding to the second detection device; correspondingly, the first serial number information can also include third serial number information and fourth serial number information, the third serial number information representing the serial number information obtained by the controller based on the counting processing of the first signal, and the fourth serial number information representing the serial number information obtained by the controller based on the counting processing of the second signal.

[0087] In some embodiments of the present disclosure, when the controller 11 performs counting processing based on the frame signal, the controller can count based on the first signal and the second signal respectively to obtain the first serial number information; for example, when the controller receives the first signal and determines that the first signal is the fourth first signal received, the controller can determine the third serial number information as 4; when the controller receives the second signal and determines that the second signal is the fourth second signal received, the controller can determine the fourth serial number information as 4; at this time, the controller can also determine that the current visual detection device has obtained the image information of the two surfaces of the fourth pole piece based on the third serial number information and the fourth serial number information; and then the controller can perform die cutting operation on the fourth pole piece after receiving the die cutting encoding information corresponding to the fourth pole piece.

[0088] In the embodiments of the present disclosure, the cutting device 15 can be configured to cut the pole piece to form a pole lug according to the process requirement, or perform skip cutting; the cutting device 15 can be a laser cutting device capable of cutting the pole piece by using a laser beam.

[0089] In some embodiments of the present disclosure, the controller 11 can be further configured to control the cutting device 15 to cut the tabs of the current unit length of the pole piece if it is determined according to the quality information that the current unit length of the pole piece has no defects; and control the cutting device 15 to perform a skip cut on the current unit length of the pole piece if it is determined according to the quality information that the current unit length of the pole piece has defects.

[0090] In some embodiments of the present disclosure, the pole piece is transported from the unwinding device to the visual inspection device, and then to the cutting device in the die-cutting system.

[0091] In some embodiments of the present disclosure, the host computer 13 can be further configured to generate first die-cutting operation encoding information according to the first image information and send the first die-cutting operation encoding information to the controller 11 if the first image information is received; and generate second die-cutting operation encoding information according to the second image information and send the second die-cutting operation encoding information to the controller 11 if the second image information is received.

[0092] In some embodiments of the present disclosure, the first die-cutting operation encoding information can include first quality information, and the second die-cutting operation encoding information can include second quality information; the controller 11 can be further configured to determine that the current unit length of the pole piece has no defects if the first quality information indicates that the first surface has no defects and the second quality information indicates that the second surface has no defects; otherwise, determine that the current unit length of the pole piece has defects.

[0093] For example, when the host computer receives the image information (first image information) of the front surface of the 4th segment of the pole piece, it determines that the first quality information indicates no defects after performing pole piece defect detection on the image information, and generates the first die-cutting operation encoding information based on the first quality information and sends it to the controller; when the host computer receives the image information (second image information) of the back surface of the 4th segment of the pole piece, it determines that the second quality information indicates defects after performing pole piece defect detection on the image information, and generates the second die-cutting operation encoding information based on the second quality information and sends it to the controller; and then when the controller receives the first die-cutting operation encoding information and the second die-cutting operation encoding information of the 4th segment of the pole piece, it can determine that the 4th segment of the pole piece has defects based on the first quality information and the second quality information.

[0094] In some embodiments of the present disclosure, the first die-cutting operation encoding information and the second die-cutting operation encoding information can each include second serial number information; that is, when the host computer generates the respective die-cutting operation encoding information for the image information of different surfaces of the current unit length of the pole piece, it can generate the corresponding die-cutting operation encoding information according to the quality information of the surface and the serial number information of the current unit length of the pole piece corresponding to the surface.

[0095] In some embodiments of the present disclosure, the host computer 13 can also be configured to acquire length information of the image information, and determine difference information between the length information and the unit length parameter; and in a case where the difference information is greater than a preset difference information, send an alarm prompt information to the controller 11; the controller 11 can also be configured to respond to the alarm prompt information to perform alarm processing.

[0096] For example, the unit length parameter is x cm, and the length information of the image information currently acquired by the host computer is x1 cm, the difference information between x1 and x is represented as a, and the preset difference information is a. If a > a, the controller is sent an alarm prompt information.

[0097] In embodiments of the present disclosure, the alarm prompt information can be used to prompt that the length of the image information currently detected by the detection device does not meet the preset requirements.

[0098] In embodiments of the present disclosure, the form of the alarm processing is not limited by the present disclosure, for example, the alarm information can be displayed through a human-computer interaction interface, and the alarm can also be performed through a sound alarm.

[0099] In some embodiments of the present disclosure, the second serial number information can be a first encoding bit in the die-cutting operation encoding information; and the quality information can be a second encoding bit in the die-cutting operation encoding information.

[0100] In embodiments of the present disclosure, the length or the number of bits of the die-cutting operation encoding information is not limited by the present disclosure, for example, the die-cutting operation encoding information can be a 10-bit length encoding; the position of the first encoding bit in the die-cutting operation encoding information is not limited by the present disclosure, for example, the second-to-last bit in the die-cutting operation encoding information can be used as the first encoding bit; and the position of the second encoding bit in the die-cutting operation encoding information is not limited by the present disclosure, for example, the last bit in the die-cutting operation encoding information can be used as the second encoding bit.

[0101] In some embodiments of the present disclosure, the controller 11 can also be configured to compare the first serial number information and the second serial number information, determine that the verification result is verification passed in a case where the first serial number information is same as the second serial number information, verification passed indicating that the die-cutting operation encoding information is the encoding information corresponding to the current unit length pole piece; and determine that the verification result is verification failed in a case where the first serial number information is different from the second serial number information, verification failed indicating that the die-cutting operation encoding information is not the encoding information corresponding to the current unit length pole piece.

[0102] In some embodiments of the present disclosure, the controller 11 can be further configured to determine that the current unit length of the pole piece has no defect when the second serial number information is the first value; and determine that the current unit length of the pole piece has a defect when the second serial number information is the second value.

[0103] In embodiments of the present disclosure, the specific values of the first value and the second value are not limited in the present disclosure. For example, the first value can be 1, and the second value can be 0.

[0104] In some embodiments of the present disclosure, the die-cutting operation encoding information can be the first die-cutting operation encoding information or the second die-cutting operation encoding information. Accordingly, the die-cutting operation encoding information can further include a third encoding bit, the third encoding bit being used to indicate the type of the die-cutting operation encoding information. When the third encoding bit is a third value, the controller can determine that the die-cutting operation encoding information is the first die-cutting operation encoding information. When the third encoding bit is a fourth value, the controller can determine that the die-cutting operation encoding information is the second die-cutting operation encoding information.

[0105] In some embodiments of the present disclosure, the position of the third encoding bit in the die-cutting operation encoding information is not limited in the present disclosure. For example, the first bit in the die-cutting operation encoding information can be the third encoding bit.

[0106] In embodiments of the present disclosure, the specific values of the third value and the fourth value are not limited in the present disclosure. For example, the third value can be 1, and the fourth value can be 0.

[0107] For example, the first serial number information generated by the controller after the counting process is 6; and the received die-cutting operation encoding information is the encoding information 10000060. It can be determined that the value of the first encoding bit is 6, which is the same as the first serial number information, so that it can be determined that the die-cutting operation encoding information 10000060 is the encoding information corresponding to the 6th segment of the pole piece. At the same time, the controller can also determine that the value of the second encoding bit is 0, indicating that there is a defect; and can also determine that the value of the third encoding bit is 1, indicating that the die-cutting operation encoding information is the first die-cutting operation encoding information, which is obtained by processing the front image information of the 6th segment of the pole piece.

[0108] In embodiments of the present disclosure, the controller can further store the first serial number information and the die-cutting operation encoding information.

[0109] In embodiments of the present disclosure, the controller 11 can be further configured to obtain position information of the current unit length of the pole piece; and in a case where it is determined according to the position information that the current unit length of the pole piece reaches a preset region, control the cutting device to perform die-cutting or kiss-cutting on the current unit length of the pole piece; wherein the preset region represents a region where the cutting device is located.

[0110] In the embodiments of the present disclosure, since the current unit length of the pole piece will continue to be transported to the cutting device after being photographed by the visual detection device, the controller will not control the cutting device to perform die cutting or kiss cutting on the current unit length of the pole piece before the current unit length of the pole piece reaches the cutting device; the controller can obtain the position information of the current unit length of the pole piece in real time after receiving the frame signal corresponding to the current unit length of the pole piece, to determine whether the current unit length of the pole piece reaches the cutting device, so as to perform die cutting or kiss cutting on the current unit length of the pole piece when it reaches the cutting device, thereby improving the accuracy of die cutting.

[0111] In some embodiments of the present disclosure, the controller 11 can also be configured to obtain the transportation distance of the current unit length of the pole piece, and control the cutting device to perform die cutting or kiss cutting on the current unit length of the pole piece when it is determined that the transportation distance reaches a preset distance.

[0112] In some embodiments of the present disclosure, the preset distance can be obtained based on the distance between the visual detection device and the cutting device; the controller can monitor the transportation distance of the current unit length of the pole piece after receiving the frame signal corresponding to the current unit length of the pole piece, and compare the transportation distance with the preset distance, and when the transportation distance reaches the preset distance, it is determined that the current unit length of the pole piece is transported to the cutting device, and then the cutting device can be controlled to perform die cutting or kiss cutting on the current unit length of the pole piece.

[0113] In some embodiments of the present disclosure, the preset distance can be a distance value obtained by subtracting a preset value from the distance between the visual detection device and the cutting device, and the numerical value of the preset value is not limited in the present disclosure; for example, the distance between the visual detection device and the cutting device is 12000 mm, and the preset value is β mm, then the preset distance can be 12000-β mm, and when the transportation distance of the current unit length of the pole piece reaches 12000-β mm, it can be determined that the current unit length of the pole piece reaches the position where the cutting device is located.

[0114] In some embodiments of the present disclosure, the die cutting system can further include a winding device, which can wind the pole piece after die cutting.

[0115] In the embodiment of the present disclosure, a die cutting system is provided, comprising a controller, a visual detection device, an input-output board, a cutting device, and a host computer; the visual detection device is configured to generate a frame signal indicating that the image acquisition of the current unit length of the pole piece is completed through the input-output board when the image information of the current unit length of the pole piece is acquired, and send the frame signal to the controller and the image information to the host computer; the host computer is configured to generate die cutting operation coding information according to the image information, and send the die cutting operation coding information to the controller; the controller is configured to generate first serial number information of the current unit length of the pole piece according to the frame signal, and verify second serial number information recorded in the die cutting operation coding information by using the first serial number information when the die cutting operation coding information is received, and confirm whether the current unit length of the pole piece is die cut according to quality information in the die cutting operation coding information when the current unit length of the pole piece reaches the cutting device. It can be seen that, in the embodiment, the visual detection device is used to capture the unit length of the pole piece, and a frame signal is generated through the input-output board when the image information of the current unit length of the pole piece is acquired, the frame signal is sent to the controller to indicate that the image information of the current unit length of the pole piece is acquired, and the image information is sent to the host computer, so that the controller generates the first serial number information of the current unit length of the pole piece in response to the frame signal, and verifies the die cutting operation coding information by using the first serial number information when the die cutting operation coding information generated by the host computer according to the image information is received, to determine whether the die cutting operation coding information is the coding information corresponding to the current unit length of the pole piece. In this way, the coding information indicating the die cutting operation of the current unit length of the pole piece can be correctly matched before the die cutting operation of the current unit length of the pole piece is performed, so that the die cutting operation coding information is determined to be the coding information corresponding to the current unit length of the pole piece, and whether the current unit length of the pole piece is die cut according to the quality information in the die cutting operation coding information, which can greatly improve the accuracy and reliability of the die cutting.

[0116] Based on the above embodiment, in another embodiment of the present disclosure, a die cutting method is provided, applied to a die cutting system; as shown in FIG. 4, the die cutting method of the die cutting system can comprise the following steps:

[0117] Step 101, the visual detection device generates a frame signal indicating that the image acquisition of the current unit length of the pole piece is completed through the input-output board when the image information of the current unit length of the pole piece is acquired, and sends the frame signal to the controller and the image information to the host computer.

[0118] In the embodiments of the present disclosure, the visual detection device can generate a frame signal of the current unit length of the pole piece image acquisition end through the input and output board card when the image information of the current unit length of the pole piece is acquired, and send the frame signal to the controller and send the image information to the upper computer.

[0119] In some embodiments of the present disclosure, the visual detection device can be a CCD device, and the CCD device can send a frame signal to the controller through the input and output board card after obtaining the image information of the current unit length of the pole piece each time, to instruct the controller that the image information is currently acquired.

[0120] In the embodiments of the present disclosure, the specific value of the unit length is not limited in the present disclosure, for example, the unit length can be x centimeters, that is, the length range of each shooting of the visual detection device is x centimeters, and each shooting can obtain the image information corresponding to the current unit length of x centimeters of the pole piece.

[0121] In some embodiments of the present disclosure, the visual detection device can shoot the pole piece unwound by the unwinding device, and the length of a section of the pole piece shot each time can be the unit length.

[0122] In some embodiments of the present disclosure, the visual detection device can include a first detection device and a second detection device; when the visual detection device acquires the image information of the current unit length of the unit length of the pole piece, the first detection device can shoot the first surface of the current unit length of the pole piece to obtain the first image information, and the second detection device can shoot the second surface of the current unit length of the pole piece to obtain the second image information; wherein the first surface and the second surface are two different surfaces of the pole piece.

[0123] In some embodiments of the present disclosure, the first surface can be the front surface of the pole piece, and the second surface can be the back surface of the pole piece; the first detection device can shoot the front surface of the current unit length of the pole piece to obtain the image information of the front surface of the current unit length of the pole piece, that is, the first image information; and the second detection device can shoot the back surface of the current unit length of the pole piece to obtain the image information of the back surface of the current unit length of the pole piece, that is, the second image information.

[0124] In some embodiments of the present disclosure, when the visual detection device includes a first detection device and a second detection device, the frame signal can include a first signal and a second signal, the first signal representing the frame signal sent by the input and output board card corresponding to the first detection device, and the second signal representing the frame signal sent by the input and output board card corresponding to the second detection device.

[0125] In step 102, the controller generates first serial number information of the current unit length of the pole piece according to the frame signal, and in the case that the die cutting operation coding information generated by the host computer according to the image information is received, the first serial number information is used to check the second serial number information recorded in the die cutting operation coding information.

[0126] In the embodiment of the present disclosure, in the case that the visual detection device acquires the image information of the current unit length of the pole piece, the frame signal indicating that the image acquisition of the current unit length of the pole piece is completed is generated by the input and output board card and sent to the controller, and after the image information is sent to the host computer, the controller can generate the first serial number information of the current unit length of the pole piece according to the frame signal, and in the case that the die cutting operation coding information generated by the host computer according to the image information is received, the first serial number information is used to check the second serial number information recorded in the die cutting operation coding information.

[0127] In the embodiment of the present disclosure, the die cutting operation coding information is generated by the host computer according to the image information, and can be used to indicate the information of performing die cutting or kiss cutting.

[0128] In some embodiments of the present disclosure, the die cutting operation coding information can include second serial number information and quality information; wherein the second serial number information represents the serial number information of the current unit length of the pole piece generated by the host computer according to the image information; and the quality information can be used to indicate the quality condition of the current unit length of the pole piece.

[0129] In the embodiment of the present disclosure, the quality condition can include two conditions of existing defects and non-existing defects; the form of the defects is not limited in the present disclosure, for example, the defects possibly existing on the pole piece include foreign matter, scratches, scratches, etc.

[0130] In the embodiment of the present disclosure, the representation form of the quality information is not limited in the present disclosure, for example, different numerical values or letters can be used to represent different quality conditions of the current unit length of the pole piece; for example, the numerical value 1 can be used to represent non-existing defects, and the numerical value 0 can be used to represent existing defects.

[0131] In some embodiments of the present disclosure, the host computer can perform pole piece defect detection on the image information to obtain the quality information.

[0132] In some embodiments of the present disclosure, the controller can perform counting processing based on the frame signal to obtain the first serial number information; and then compare the first serial number information with the second serial number information to complete the checking.

[0133] In some embodiments of the present disclosure, the first serial number information can include third serial number information and fourth serial number information, the third serial number information representing serial number information obtained by the controller through counting processing based on the first signal, and the fourth serial number information representing serial number information obtained by the controller through counting processing based on the second signal.

[0134] In some embodiments of the present disclosure, the second serial number information can be a first encoding bit in the encoding information, and the quality information can be a second encoding bit in the encoding information.

[0135] In embodiments of the present disclosure, the length or the number of bits of the die-cutting operation encoding information is not limited in the present disclosure, for example, the die-cutting operation encoding information can be a 10-bit length encoding, the position of the first encoding bit in the die-cutting operation encoding information is not limited in the present disclosure, for example, the second-to-last bit in the die-cutting operation encoding information can be used as the first encoding bit, and the position of the second encoding bit in the die-cutting operation encoding information is not limited in the present disclosure, for example, the last bit in the die-cutting operation encoding information can be used as the second encoding bit.

[0136] In some embodiments of the present disclosure, when the controller compares the first serial number information and the second serial number information to complete the verification, the controller can compare the first serial number information and the second serial number information, and in the case that the first serial number information is determined to be the same as the second serial number information, it is determined that the verification result is a verification pass, which means that the die-cutting operation encoding information is the encoding information corresponding to the current unit length of the pole piece, and in the case that the first serial number information is determined to be different from the second serial number information, it is determined that the verification result is a verification failure, which means that the die-cutting operation encoding information is not the encoding information corresponding to the current unit length of the pole piece.

[0137] In some embodiments of the present disclosure, the controller can also determine that the current unit length of the pole piece does not have a defect in the case that the second encoding bit is the first value, and the controller can determine that the current unit length of the pole piece has a defect in the case that the second encoding bit is the second value.

[0138] In embodiments of the present disclosure, the specific values of the first value and the second value are not limited in the present disclosure, for example, the first value can be 1, and the second value can be 0.

[0139] In some embodiments of the present disclosure, the host computer can generate the first die-cutting operation encoding information according to the first image information and send the first die-cutting operation encoding information to the controller in the case that the first image information is received, and generate the second die-cutting operation encoding information according to the second image information and send the second die-cutting operation encoding information to the controller in the case that the second image information is received.

[0140] In some embodiments of the present disclosure, the die-cutting operation encoding information can be first die-cutting operation encoding information or second die-cutting operation encoding information; accordingly, the die-cutting operation encoding information can further include a third encoding bit, the third encoding bit being used to indicate the type of the die-cutting operation encoding information, when the third encoding bit is a third value, the controller can determine that the die-cutting operation encoding information is the first die-cutting operation encoding information, and when the third encoding bit is a fourth value, the controller can determine that the die-cutting operation encoding information is the second die-cutting operation encoding information.

[0141] In some embodiments of the present disclosure, the position of the third encoding bit in the encoding information is not limited in the present disclosure, for example, the first bit in the encoding information can be the third encoding bit.

[0142] In embodiments of the present disclosure, the specific values of the third value and the fourth value are not limited in the present disclosure, for example, the third value can be 1, and the fourth value can be 0.

[0143] In step 103, when the verification is passed, the controller confirms, according to the quality information in the die-cutting operation encoding information, whether the current unit length of the pole piece is subjected to die-cutting when the current unit length of the pole piece reaches the cutting device.

[0144] In embodiments of the present disclosure, the controller generates the first serial number information of the current unit length of the pole piece according to the frame signal, and after receiving the die-cutting operation encoding information generated by the upper computer according to the image information, the controller verifies the second serial number information recorded in the die-cutting operation encoding information by using the first serial number information, and when the verification is passed, the controller confirms, according to the quality information in the die-cutting operation encoding information, whether the current unit length of the pole piece is subjected to die-cutting when the current unit length of the pole piece reaches the cutting device.

[0145] In some embodiments of the present disclosure, when the controller controls the die-cutting of the current unit length of the pole piece based on the die-cutting operation encoding information, the controller can control the cutting device to cut the tab of the current unit length of the pole piece when it is determined according to the quality information that the current unit length of the pole piece does not have defects; and the controller can control the cutting device to perform skip cutting on the current unit length of the pole piece when it is determined according to the quality information that the current unit length of the pole piece has defects.

[0146] In some embodiments of the present disclosure, the pole piece is transported from the unwinding device in the die-cutting system, then reaches the visual detection device, and then is transported to the cutting device.

[0147] In some embodiments of the present disclosure, the first die-cutting operation encoding information can include first quality information, and the second die-cutting operation encoding information can include second quality information.

[0148] In some embodiments of the present disclosure, the second serial number information can be included in both the first die-cutting operation encoding information and the second die-cuting operation encoding information; that is, when the host computer generates the respective die-cutting operation encoding information for the image information of the different surfaces of the current unit length of the pole piece, the host computer can generate the corresponding die-cuting operation encoding information according to the quality information of the surface and the serial number information of the current unit length of the pole piece corresponding to the surface.

[0149] In some embodiments of the present disclosure, the controller can determine that the current unit length of the pole piece has no defects when it is determined according to the first quality information that the first surface has no defects and it is determined according to the second quality information that the second surface has no defects; otherwise, it is determined that the current unit length of the pole piece has defects.

[0150] In embodiments of the present disclosure, the controller can further store the first serial number information and the die-cutting operation encoding information, and store the first serial number information and the die-cuting operation encoding information according to the corresponding current unit length of the pole piece when storing.

[0151] In embodiments of the present disclosure, as shown in FIG. 5, the die-cutting method can further include the following steps:

[0152] Step 201, the host computer obtains length information of the image information, and determines difference information between the length information and the unit length parameter.

[0153] In embodiments of the present disclosure, the host computer can further obtain length information of the image information, and determine difference information between the length information and the unit length parameter.

[0154] Step 202, the host computer sends alarm prompt information to the controller when the difference information is greater than a preset difference value.

[0155] In embodiments of the present disclosure, after the host computer obtains the length information of the image information and determines the difference information between the length information and the unit length parameter, the host computer can send alarm prompt information to the controller when the difference information is greater than a preset difference value.

[0156] In embodiments of the present disclosure, the alarm prompt information can be used to prompt that the length of the image information captured by the current detection device does not meet the preset requirements.

[0157] Step 203, the controller performs alarm processing in response to the alarm prompt information.

[0158] In embodiments of the present disclosure, after the host computer sends alarm prompt information to the controller when the difference information is greater than a preset difference value, the controller can perform alarm processing in response to the alarm prompt information.

[0159] In the embodiments of the present disclosure, the form of the alarm processing is not limited by the present disclosure, for example, the alarm information can be displayed through a man-machine interaction interface, and the alarm can also be performed through a sound alarm.

[0160] In the embodiments of the present disclosure, as shown in FIG. 6, the die cutting method can further include the following steps:

[0161] In step 301, the controller acquires position information of the current unit length of the pole piece.

[0162] In the embodiments of the present disclosure, the controller can acquire the position information of the current unit length of the pole piece.

[0163] In the embodiments of the present disclosure, since the current unit length of the pole piece will continue to be transported to the cutting device after being photographed by the visual detection device, the controller will not control the cutting device to perform die cutting or skip cutting on the current unit length of the pole piece before the current unit length of the pole piece reaches the cutting device; the controller can acquire the position information of the current unit length of the pole piece in real time after receiving the frame signal corresponding to the current unit length of the pole piece, to determine whether the current unit length of the pole piece reaches the cutting device.

[0164] In some embodiments of the present disclosure, the controller can also acquire the transportation distance of the current unit length of the pole piece, so as to determine whether the die cutting or skip cutting can be performed on the current unit length of the pole piece based on the transportation distance.

[0165] In some embodiments of the present disclosure, when the transportation distance reaches the preset distance, it can be determined that the current unit length of the pole piece has reached the cutting device, and the cutting device can be controlled to perform die cutting or skip cutting on the current unit length of the pole piece.

[0166] In step 302, the controller controls the cutting device to perform die cutting or skip cutting on the current unit length of the pole piece in a case where it is determined according to the position information that the current unit length of the pole piece reaches a preset region; wherein the preset region represents a region where the cutting device is located.

[0167] In the embodiments of the present disclosure, after acquiring the position information of the current unit length of the pole piece, the controller can control the cutting device to perform die cutting or skip cutting on the current unit length of the pole piece in a case where it is determined according to the position information that the current unit length of the pole piece reaches a preset region; wherein the preset region represents a region where the cutting device is located.

[0168] In some embodiments of the present disclosure, the controller can control the cutting device to perform die cutting or skip cutting on the current unit length of the pole piece in a case where it is determined that the transportation distance reaches the preset distance after acquiring the transportation distance of the current unit length of the pole piece.

[0169] In some embodiments of the present disclosure, the controller can also control the winding device to wind the current unit length of the pole piece after controlling the cutting device to perform die cutting on the current unit length of the pole piece.

[0170] In an embodiment of the present disclosure, a die cutting method is provided; the visual detection device generates a frame signal of the current unit length of the pole piece image acquisition end through the input and output board card when the image information of the current unit length of the pole piece is acquired, and sends the frame signal to the controller and sends the image information to the upper computer; the controller generates the first serial number information of the current unit length of the pole piece according to the frame signal, and checks the second serial number information recorded in the die cutting operation coding information by using the first serial number information when receiving the die cutting operation coding information generated by the upper computer according to the image information; the controller confirms whether the current unit length of the pole piece is die cut when the current unit length of the pole piece reaches the cutting device according to the quality information in the die cutting operation coding information when the checking is passed. It can be seen that in the present embodiment, the visual detection device can be used to shoot the unit length of the pole piece, and when the image information of the current unit length of the pole piece is acquired, the frame signal is generated through the input and output board card and sent to the controller to indicate that the image information of the current unit length of the pole piece is acquired, and the image information is sent to the upper computer, so that the controller generates the first serial number information of the current unit length of the pole piece in response to the frame signal, and checks the die cutting operation coding information by using the first serial number information when receiving the die cutting operation coding information generated by the upper computer according to the image information, to determine whether the die cutting operation coding information is the coding information corresponding to the current unit length of the pole piece. In this way, before performing the die cutting operation on the current unit length of the pole piece, the coding information indicating the die cutting operation of the current unit length of the pole piece is correctly matched first, so that when it is determined that the die cutting operation coding information is the coding information corresponding to the current unit length of the pole piece, whether the current unit length of the pole piece is die cut according to the quality information in the die cutting operation coding information, which can greatly improve the accuracy and reliability of the die cutting.

[0171] Based on the above embodiments, in another embodiment of the present disclosure, as shown in FIG. 7, the visual detection device is a CCD device, which can take a picture of each unit length of the pole piece, and send the image information of each pole piece segment obtained to the host computer to generate corresponding die cutting operation encoding information. The die cutting operation encoding information can include information for indicating the quality of the pole piece, such as the absence of defects (OK) or the presence of defects (NG) in the pole piece; and the controller can further check the die cutting operation encoding information. When the die cutting operation encoding information passes the check, the die cutting operation encoding information can be executed according to the die cutting operation encoding information, including cutting the tab in the case of no defects in the pole piece and storing the die cutting operation encoding information; and in the case of defects in the pole piece, the die cutting operation encoding information can be executed and stored.

[0172] For example, the die cutting operation encoding information generated by the host computer can be represented as 10000011, wherein the first encoding bit is 1, which can represent the front surface of the pole piece, the second last encoding bit is 1, which can represent the first pole piece, i.e. the first pole piece segment currently photographed, and the last encoding bit is 1, which can represent that the front surface of the pole piece has no defects.

[0173] In an embodiment of the present disclosure, the die cutting system can be composed of unwinding device and winding device, cutting device (laser), visual detection device (including CCD and sensor), and controller (PLC). The main function of the die cutting system is to cut the pole piece to form the tab of the battery cell according to the process requirements.

[0174] In an embodiment of the present disclosure, the skip cutting refers to the cutting device not performing the tab cutting action.

[0175] In some embodiments of the present disclosure, the pole piece can be photographed when passing through the CCD device. The CCD device can set the level state of the related reset circuit to 0 after each photographing is completed, and set it to 1 when an image is photographed. The I / O frame signal of the board card can be sent to the PLC immediately after the photographing is completed. The PLC can identify the frame signal to determine whether the front surface or the back surface of the pole piece is currently photographed. The PLC counts the I / O frame signal to check the die cutting operation encoding information sent by the host computer based on the count value (first serial number information). The PLC can also feed back the count value to the host computer for judgment after counting, that is, in addition to the PLC checking the die cutting operation encoding information, the host computer can also verify the count value, but it does not affect the checking process of the PLC. The PLC records the die cutting operation encoding information corresponding to the current frame signal and the surface (front surface or back surface) of the corresponding pole piece, and stores these information. Wherein, the controller receives the die cutting operation encoding information sent by the host computer lags behind the I / O signal.

[0176] In some embodiments of the present disclosure, the host computer can also determine whether the shooting meets the requirements according to the length information of the image information; for example, the length information of the image information is a3, the unit length parameter is a2, the difference = a3-a2, and the difference is within the allowable range of deviation, otherwise the alarm prompt information is fed back to the PLC, which can improve the accuracy of shooting and the accuracy of the die cutting system in executing die cutting.

[0177] In some embodiments of the present disclosure, since the I / O frame signal is transmitted to the PLC in advance of the die cutting operation encoding information, the PLC counts and stores according to the I / O frame signal, so that the PLC can complete the counting of the number of photographs alone and allow the host computer to send the die cutting operation encoding information with a delay, which can improve the processing speed of the PLC, and also reduce the repeated or erroneous transmission of data and related information; at the same time, the stability of the overall interaction between the CCD device and the PLC can be improved based on the heartbeat signal; when the equipment is powered off and restarted, the number of counts of the I / O frame signal can also be used to unify the reference number of the CCD and the host computer in information processing.

[0178] In some embodiments of the present disclosure, the host computer supports parallel processing of die cutting operation encoding information; when the host computer sends different die cutting operation encoding information to the PLC, it can not be sent in the order of the die cutting operation encoding information; for example, when the host computer generates the die cutting operation encoding information for the image of the 5th pole piece, it has not obtained the quality situation, i.e., the last bit of the die cutting operation encoding information is still missing, for example, the incomplete code is 1000005, and the last bit is 0 or 1 which has not been determined; but at this time the host computer has completed the encoding of the image of the 6th pole piece and obtained the complete die cutting operation encoding information, for example, the die cutting operation encoding information corresponding to the 6th pole piece is 10000060, then 10000060 can be sent to the PLC in priority, without waiting for the die cutting operation encoding information of the 5th pole piece, which can speed up the data processing speed under high-speed production.

[0179] In some embodiments of the present disclosure, the controller can verify the die-cutting operation coding information based on the I / O frame signal, including verifying the length of the die-cutting operation coding information, such as whether it is a 10-bit code, and whether the data type of the die-cutting operation coding information conforms to the preset data type, etc.; the controller can count based on the increment of the number of frame signals, and then verify the die-cutting operation coding information using the count value after obtaining the die-cutting operation coding information, to determine whether the data can be correctly stored; the PLC can store the die-cutting operation coding information according to the count value, and analyze the die-cutting operation coding information, such as determining whether the last bit of the code is 1 (OK) or 0 (NG), and then storing the die-cutting operation coding information into the data under the corresponding frame signal or count value; when the corresponding pole segment reaches the cutting device, the stored relevant analysis results or die-cutting operation coding information can be called to determine whether the cutting device performs a skip cut, for example, if the last bit of the die-cutting operation coding information is 1, no skip cut is performed, and if it is 0, a skip cut is performed.

[0180] Exemplarily, as shown in Table 1 below, the die-cutting operation coding information of the front side of each pole segment (the current unit length of the pole segment) stored by the controller, the count value, and the quality determination result of whether it is NG:

[0181] Table 1

[0182] For example, the die-cutting operation coding information of the first pole segment is 10000011, the first code is 1, indicating that the die-cutting operation coding information is the corresponding die-cutting operation coding information of the front side of the first pole segment, the second last bit is 1, indicating that it is the first pole segment, and the last bit of the code is 1, indicating that the quality of the front side is OK, and there is no defect.

[0183] Exemplarily, as shown in Table 2 below, the die-cutting operation coding information of the back side of each pole segment stored by the controller, the count value, and the quality determination result of whether it is NG:

[0184] Table 2

[0185] For example, the die-cutting operation coding information of the first pole segment is 00000011, the first code is 0, indicating that the die-cutting operation coding information is the corresponding die-cutting operation coding information of the back side of the first pole segment, the second last bit is 1, indicating that it is the first pole segment, and the last bit of the code is 1, indicating that the quality of the back side is OK, and there is no defect.

[0186] Exemplarily, the die-cutting operation code information of each pole piece segment sent by the upper computer to the controller in sequence can be: 10000011, 10000021, 00000011, 00000021, 10000031, 00000030, 00000041, 10000040, 00000051, 10000050; taking the third die-cutting operation code information 00000011 as an example, the last second bit code is 1, indicating that it corresponds to the first segment of the pole piece, the first bit code is 0, indicating that the die-cutting operation code information is obtained according to the image of the reverse side of the first segment of the pole piece, and the last bit is 1, indicating that the reverse side of the first segment of the pole piece does not exist defects.

[0187] Exemplarily, as shown in FIG. 8, the die-cutting method of the die-cutting system can include the following steps:

[0188] Step 401, the CCD device photographs the front side of the pole piece segment.

[0189] Step 402, the board card of the CCD device sends an I / O frame signal of the completion of front side photographing to the PLC.

[0190] Step 403, the PLC adds 1 to the count value of the counter when receiving the rising edge of the I / O frame signal, and sends the count value to the upper computer.

[0191] Step 404, the upper computer generates die-cutting operation code information according to the image sent by the CCD device and sends it to the PLC.

[0192] Step 405, the PLC checks the die-cutting operation code information, and stores it in the case of passing the check.

[0193] Step 406, determine whether the last bit code of the die-cutting operation code information is 1.

[0194] Step 407, control the cutting device to cut the tab of the pole piece segment.

[0195] Step 408, control the cutting device to perform skip cutting on the pole piece segment.

[0196] Exemplarily, the PLC can obtain the transportation distance of the pole piece segment, and perform skip cutting on the pole piece segment in the case of determining that the transportation distance reaches 12000-βmm.

[0197] In this embodiment, the above process can be performed on each pole piece segment in sequence to complete the die-cutting operation on all pole piece segments.

[0198] In the die-cutting process, the CCD device machine board card and the related software in the die-cutting system send I / O frame signals to the PLC, and image information is sent to the upper computer, wherein the I / O frame signals reach the PLC before the die-cutting operation code information generated by the upper computer, and then the PLC performs data processing and storage based on the I / O frame signals, which can effectively reduce the data transmission errors or data matching errors between the controller and the CCD or the upper computer, improve the accuracy and stability of the related information in the die-cutting process, and reduce the operation data amount in the PLC in the high-speed production environment, thereby improving the response speed of the cutting device. In addition, the PLC can also feed back the count value and the verification result to the CCD upper computer system, so that the information of the two is synchronized. The PLC performs signal interaction with the CCD, counts by using the corresponding processing method on the PLC, and verifies the die-cutting operation code information by using the I / O frame signals; meanwhile, the PLC can also latch the related data corresponding to each pole piece segment, and obtain the related information of the pole piece segment that needs to be jumped in advance, so as to control the die-cutting laser to perform the corresponding jumping action; the upper computer can also determine whether the shooting of each pole piece segment has a too large shooting size deviation, and generate alarm prompt information to feed back to the PLC for alarm when it is determined that there is a too large deviation, so as to improve the reliability of the die-cutting process.

[0199] Those skilled in the art should understand that the embodiments of the present disclosure can be provided as a method, a system, or a computer program product. Therefore, the present disclosure can take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects.

[0200] The present disclosure is described with reference to the implementation flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present disclosure. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of the flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices produce a device for implementing the functions specified in one or more flows in the flowcharts and / or one or more blocks in the block diagrams.

[0201] The above is only a preferred embodiment of the present disclosure, and is not intended to limit the protection scope of the present disclosure.

Claims

1. A die cutting system, comprising a controller, a visual detection device, an input-output board card, a cutting device and a host computer; the visual detection device is configured to, when image information of a current unit length of a pole piece is acquired, generate a frame signal indicating that image acquisition of the current unit length of the pole piece is completed through the input-output board card, and send the frame signal to the controller and the image information to the host computer; the host computer is configured to generate die cutting operation encoding information according to the image information, and send the die cutting operation encoding information to the controller; the controller is configured to generate first serial number information of the current unit length of the pole piece according to the frame signal, and when the die cutting operation encoding information is received, check second serial number information recorded in the die cutting operation encoding information by using the first serial number information, and when the check is passed, determine whether to perform die cutting on the current unit length of the pole piece according to quality information in the die cutting operation encoding information when the current unit length of the pole piece reaches the cutting device. 2.The die cutting system of claim 1, wherein the controller is further configured to perform counting processing based on the frame signal to obtain the first serial number information, compare the first serial number information and the second serial number information to complete the check, and generate corresponding first serial number information for each unit length of the pole piece according to the frame signal. 3.The die cutting system of claim 1 or 2, wherein the host computer is further configured to perform pole piece defect detection on the image information to obtain the quality information; the controller is further configured to, when it is determined according to the quality information that the current unit length of the pole piece has no defect, control the cutting device to cut a tab of the current unit length of the pole piece; and when it is determined according to the quality information that the current unit length of the pole piece has a defect, control the cutting device to perform skip cutting on the current unit length of the pole piece. the visual detection device comprises a first detection device and a second detection device; 4. The die cutting system of any one of claims 1 to 3, wherein, the first detection device is configured to photograph a first surface of the current unit length of the pole piece to obtain first image information; the second detection device is configured to photograph a second surface of the current unit length of the pole piece to obtain second image information; the input-output board card is configured to generate a frame signal indicating that first image information acquisition of the current unit length of the pole piece is completed and a frame signal indicating that second image information acquisition of the current unit length of the pole piece is completed. 5.The die cutting system of claim 4, wherein the host computer is further configured to, when the first image information is received, generate first die cutting operation encoding information according to the first image information, and send the first die cutting operation encoding information to the controller; and when the second image information is received, generate second die cutting operation encoding information according to the second image information, and send the second die cutting operation encoding information to the controller. ​ ​ 6.The die cutting system of claim 5, wherein, the controller is further configured to determine that the current unit length of the pole piece is defect-free if the first surface is determined to be defect-free according to the first quality information in the die cutting operation encoding information and the second surface is determined to be defect-free according to the second quality information in the die cutting operation encoding information; otherwise, determine that the current unit length of the pole piece is defective. 7.The die cutting system of any one of claims 1 to 6, wherein, the controller is further configured to compare the first serial number information and the second serial number information, and determine that the checking result is a checking pass if the first serial number information is determined to be the same as the second serial number information; and determine that the checking result is a checking fail if the first serial number information is determined to be different from the second serial number information. 8.The die cutting system of any one of claims 1 to 7, wherein, the controller is further configured to obtain position information of the current unit length of the pole piece, and control the cutting device to perform die cutting or skip cutting on the current unit length of the pole piece if the current unit length of the pole piece is determined to reach a preset area according to the position information; wherein the preset area represents an area where the cutting device is located. 9.The die cutting system of claim 8, wherein, the controller is further configured to obtain a transportation distance of the current unit length of the pole piece, and control the cutting device to perform die cutting or skip cutting on the current unit length of the pole piece if the transportation distance is determined to reach a preset distance. 10.The die cutting system of any one of claims 1 to 9, wherein, the host computer is further configured to obtain length information of the image information, and determine difference information between the length information and a unit length parameter; and send an alarm prompt information to the controller if the difference information is greater than a preset difference value; the controller is further configured to perform alarm processing in response to the alarm prompt information. 11.A die cutting method applied to the die cutting system of any one of claims 1 to 10, the method comprising: generating, by a vision detection device, a frame signal of an image acquisition end of a current unit length of a pole piece through an input / output board card if the vision detection device obtains image information of the current unit length of the pole piece, and sending the frame signal to a controller and sending the image information to a host computer; generating, by the controller, first serial number information of the current unit length of the pole piece according to the frame signal, and checking, by the controller, second serial number information recorded in die cutting operation encoding information generated by the host computer according to the image information, using the first serial number information; determining, by the controller, whether to perform die cutting on the current unit length of the pole piece when the current unit length of the pole piece reaches a cutting device according to quality information in the die cutting operation encoding information if the checking is passed. the method further comprising:

12. The die cutting method of claim 11, wherein, ​ The controller compares the first serial number information and the second serial number information; In a case where it is determined that the first serial number information is same as the second serial number information, it is determined that the check result is a check pass; In a case where it is determined that the first serial number information is different from the second serial number information, it is determined that the check result is a check fail.

13. The die cutting method of claim 11 or 12, wherein, The method further comprises: The host computer performs polar sheet defect detection on the image information to obtain the quality information.

14. The die cutting method according to any one of claims 11 to 13, wherein, The method further comprises: In a case where it is determined according to the quality information that the current unit length of the polar sheet does not have defects, the controller controls the cutting device to cut the current unit length of the polar sheet into tabs; In a case where it is determined according to the quality information that the current unit length of the polar sheet has defects, the controller controls the cutting device to perform skip cutting on the current unit length of the polar sheet.

15. The die cutting method according to any one of claims 11 to 14, wherein, The visual detection device comprises a first detection device and a second detection device; the method further comprises: The first detection device photographs a first surface of the current unit length of the polar sheet to obtain first image information; The second detection device photographs a second surface of the current unit length of the polar sheet to obtain second image information; The input / output board card generates a frame signal of the end of first image information acquisition of the current unit length of the polar sheet and a frame signal of the end of second image information acquisition.

16. The die cutting method of claim 15, wherein, The method further comprises: In a case where the first image information is received, the host computer generates first die cutting operation encoding information according to the first image information, and sends the first die cutting operation encoding information to the controller; In a case where the second image information is received, the host computer generates second die cutting operation encoding information according to the second image information, and sends the second die cutting operation encoding information to the controller.

17. The die cutting method of claim 16, wherein, The method further comprises: In a case where it is determined according to first quality information in the first die cutting operation encoding information that the first surface does not have defects, and according to second quality information in the second die cutting operation encoding information that the second surface does not have defects, the controller determines that the current unit length of the polar sheet does not have defects; otherwise, it is determined that the current unit length of the polar sheet has defects.

18. The die cutting method according to any one of claims 11 to 17, wherein, The method further comprises: The controller obtains position information of the current unit length of the polar sheet; In a case where it is determined according to the position information that the current unit length of the polar sheet reaches a preset area, the controller controls the cutting device to perform die cutting or skip cutting on the current unit length of the polar sheet; wherein the preset area represents an area where the cutting device is located.

19. The die cutting method of claim 18, wherein, The method further comprises: The controller is further configured to obtain a transportation distance of the current unit length of the polar sheet, and in a case where it is determined that the transportation distance reaches a preset distance, control the cutting device to perform die cutting or skip cutting on the current unit length of the polar sheet.

20. The die cutting method according to any one of claims 11 to 19, wherein, The method further comprises: The host computer obtains length information of the image information, and determines difference information between the length information and a unit length parameter; in a case where the difference information is greater than a preset difference, the host computer sends an alarm prompt information to the controller; The controller performs alarm processing in response to the alarm prompt information. The controller performs alarm processing in response to the alarm prompt information.

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