CN116715072B

CN116715072B - Rolling detection method, rolling detection equipment, storage medium and rolling detection system for rolled pole piece

Info

Publication number: CN116715072B
Application number: CN202310981304.XA
Authority: CN
Inventors: 刘玉
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2023-08-07
Filing date: 2023-08-07
Publication date: 2024-01-12
Anticipated expiration: 2043-08-07
Also published as: CN116715072A

Abstract

The invention relates to the technical field of batteries, and discloses a rolling detection method, rolling detection equipment, a storage medium and a rolling detection system for a rolled pole piece, wherein the rolling detection method comprises the following steps: in the process of rolling the pole piece after the double rolling, the thickness of the pole piece after the rolling and the number of rolling turns of the pole piece are obtained, and the rolling radius in the process of rolling the pole piece is calculated according to the thickness of the pole piece and the number of rolling turns; according to the invention, the rolling radius in the pole piece rolling process is calculated by using the thickness of the pole piece after the pole piece is rolled and the rolling number of turns of the pole piece, so that the rolling radius in the pole piece rolling process is calculated by an algorithm, inaccurate measurement results caused by interference of an ultrasonic sensor are avoided, and the accuracy of the rolling radius is improved.

Description

Rolling detection method, rolling detection equipment, storage medium and rolling detection system for rolled pole piece

Technical Field

The invention relates to the technical field of batteries, in particular to a rolling detection method, rolling detection equipment, a storage medium and a rolling detection system for a rolled pole piece.

Background

At present, in the pole piece production process of a lithium battery, an ultrasonic measurement technology is generally adopted to measure the winding radius in the pole piece winding process, however, an ultrasonic sensor is easily interfered, so that the measurement result is inaccurate.

Disclosure of Invention

In view of the above problems, the invention provides a rolling detection method, device, storage medium and system for rolling pole pieces, which aim to solve the problem that the measurement result is inaccurate due to easy interference in the existing way of measuring the rolling radius in the pole piece rolling process.

In a first aspect, the present invention provides a rolling detection method for a rolled pole piece, where the rolling detection method for the rolled pole piece includes:

in the process of rolling the pole piece after the double rolling, the thickness of the pole piece after the rolling of the pole piece and the number of rolling turns of the pole piece are obtained;

and calculating the winding radius of the pole piece in the winding process according to the thickness of the pole piece and the winding turns.

According to the technical scheme provided by the embodiment of the invention, the winding radius in the pole piece winding process is calculated by using the thickness of the pole piece after the pole piece is rolled and the winding number of the pole piece, so that the winding radius in the pole piece winding process is calculated by an algorithm, inaccurate measurement results caused by interference of an ultrasonic sensor are avoided, and the accuracy of the winding radius is improved.

In some embodiments, the calculating the winding radius of the pole piece in the winding process according to the thickness of the pole piece and the winding turns includes:

Multiplying the thickness of the pole piece by the winding turns to obtain a theoretical radius corresponding to the winding turns;

subtracting the thickness of the outer coating of the pole piece from the theoretical radius to obtain an actual radius corresponding to the winding turns;

and obtaining the radius of the winding drum corresponding to the pole piece, and adding and calculating the radius of the winding drum and the actual radius corresponding to the winding turns to obtain the winding radius in the pole piece winding process.

According to the technical scheme provided by the embodiment of the invention, the thickness of the outer coating of the pole piece is subtracted when the winding radius of the pole piece in the winding process is calculated, so that the influence of the thickness of the pole piece on the calculation result can be avoided, and the winding radius of the pole piece in the winding process can be calculated more accurately.

In some embodiments, the rolling detection method of the rolled pole piece further includes:

acquiring a winding radius of the measured pole piece in the winding process;

and comparing the measured winding radius with the calculated winding radius, and generating first maintenance information according to the comparison result.

In the technical scheme of the embodiment of the invention, the measured winding radius is compared with the calculated winding radius, so that the measured winding radius and the calculated winding radius can be mutually referenced, and further closed-loop control of the winding detection process can be realized.

monitoring whether the rolling radius meets a preset unloading condition or not under the condition that the difference value between the measured rolling radius and the calculated rolling radius is in a first preset range;

and under the condition that the winding radius meets the preset unloading condition, generating an unloading instruction.

According to the technical scheme provided by the embodiment of the invention, when the difference between the measured winding radius and the calculated winding radius is within the first preset range and the winding radius meets the preset unloading condition, an unloading instruction is generated, so that the automatic unloading can be performed in time.

multiplying the calculated winding radius by twice the circumference ratio to obtain the length of the pole piece corresponding to the winding turns;

and adding the pole piece lengths corresponding to the winding turns to obtain the total winding length in the pole piece winding process.

According to the technical scheme provided by the embodiment of the invention, the total winding length in the pole piece winding process is calculated by utilizing the winding radius in the pole piece winding process, so that the total winding length in the pole piece winding process can be accurately calculated.

acquiring the total winding length of the measured pole piece in the winding process;

and comparing the measured total winding length with the calculated total winding length, and generating second maintenance information according to the comparison result.

In the technical scheme of the embodiment of the invention, the measured total rolling length is compared with the calculated total rolling length, and the second maintenance information is generated according to the comparison result, so that the mutual reference of the measured total rolling length and the calculated total rolling length can be realized.

and generating a winding stopping instruction under the condition that the difference between the measured total winding length and the calculated total winding length is within a second preset range and the total winding length reaches a winding threshold value.

In the technical scheme of the embodiment of the invention, when the difference between the measured total rolling length and the calculated total rolling length is within the second preset range and the total rolling length reaches the rolling threshold value, a rolling stopping instruction is generated, so that rolling can be stopped in time.

In some embodiments, the pole piece thickness is an average pole piece thickness; the rolling detection method of the rolled pole piece further comprises the following steps:

and continuously collecting pole piece thickness data of preset times in the process of rolling the pole piece after the rolling, and calculating according to the pole piece thickness data to obtain the average pole piece thickness.

According to the technical scheme provided by the embodiment of the invention, the thickness of the pole piece is the average pole piece thickness, the pole piece thickness data of the preset times are continuously collected in the process of rolling the pole piece after the double-roll rolling, and the average pole piece thickness is obtained through calculation according to the pole piece thickness data, so that the accuracy of the pole piece thickness can be improved.

In a second aspect, the present invention provides a rolling detection apparatus for a rolled pole piece, the rolling detection apparatus for a rolled pole piece comprising: the rolling detection method for the rolling pole piece comprises a memory, a processor and a rolling detection program for the rolling pole piece, wherein the rolling detection program is stored in the memory and can run on the processor, and the rolling detection method for the rolling pole piece is realized when the rolling detection program for the rolling pole piece is executed by the processor.

In a third aspect, the present invention provides a storage medium, on which a rolling detection program of a rolled pole piece is stored, the rolling detection program of the rolled pole piece realizing the rolling detection method of the rolled pole piece as described above when executed by a processor.

In a fourth aspect, the present invention provides a rolling detection system for a rolled pole piece, where the rolling detection system for a rolled pole piece includes: a first sensor, a second sensor, and a controller;

the first sensor is used for obtaining the thickness of the pole piece after the pole piece is rolled in the process of rolling the pole piece after the rolling;

the second sensor is used for obtaining the winding turns of the pole piece winding in the process of winding the pole piece after the pair rolling;

and the controller is used for calculating the winding radius of the pole piece in the winding process according to the thickness of the pole piece and the winding turns.

In some embodiments, the controller is further configured to multiply the thickness of the pole piece with the number of windings to obtain a theoretical radius corresponding to the number of windings; subtracting the thickness of the outer coating of the pole piece from the theoretical radius to obtain an actual radius corresponding to the winding turns; and obtaining the radius of the winding drum corresponding to the pole piece, and adding and calculating the radius of the winding drum and the actual radius corresponding to the winding turns to obtain the winding radius in the pole piece winding process.

In some embodiments, the rolling detection system for rolling pole pieces further comprises: a third sensor;

the third sensor is used for measuring the winding radius in the winding process of the pole piece;

the controller is further used for comparing the measured winding radius with the calculated winding radius and generating maintenance information corresponding to the third sensor according to the comparison result.

In the technical scheme of the embodiment of the invention, the third sensor is arranged and used for measuring the winding radius in the winding process of the pole piece, and the controller is also used for comparing the measured winding radius with the calculated winding radius, so that the measured winding radius and the calculated winding radius can be mutually referenced, further the closed-loop control of the winding detection process can be realized, and the fault of the third sensor can be found in time.

In some embodiments, the controller is further configured to multiply the winding radius by twice the circumference ratio to obtain a pole piece length corresponding to the winding number;

The controller is also used for adding the pole piece lengths corresponding to the winding turns to obtain the total winding length in the pole piece winding process.

In some embodiments, the rolling detection system for rolling pole pieces further comprises: a fourth sensor;

the fourth sensor is used for measuring the total winding length in the winding process of the pole piece;

the controller is further configured to compare the measured total winding length with the calculated total winding length, and generate maintenance information corresponding to the fourth sensor according to a comparison result.

In the technical scheme of the embodiment of the invention, the fourth sensor is arranged and used for comparing the measured total winding length with the calculated total winding length, and generating maintenance information corresponding to the fourth sensor according to the comparison result, so that the mutual reference of the measured total winding length and the calculated total winding length can be realized, closed-loop control can be formed between the fourth sensor and the fourth sensor, and faults of the fourth sensor can be found in time.

In some embodiments, the rolling detection system for rolling pole pieces further comprises: a rubber roller; the fourth sensor is arranged on the rubber roller;

the rubber roller is used for driving the pole piece to move along and simultaneously driving the fourth sensor to rotate, and measuring the total winding length in the pole piece winding process;

and the controller is also used for comparing the measured total winding length with the calculated total winding length and detecting whether the rubber roller slips or not according to a comparison result.

According to the technical scheme provided by the embodiment of the invention, the total winding length obtained through measurement is compared with the total winding length obtained through calculation, and whether the rubber roller slips or not is detected according to the comparison result, so that the rubber roller can be maintained in time.

The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present invention more readily apparent.

Drawings

Fig. 1 is a schematic structural diagram of a rolling detection system for rolled pole pieces according to some embodiments of the present invention;

Fig. 2 is a schematic structural diagram of a rolling detection system for rolled pole pieces according to some embodiments of the present invention;

fig. 3 is a schematic structural diagram of a rolling detection system for rolled pole pieces according to some embodiments of the present invention;

fig. 4 is a flowchart of a rolling detection method for a rolled pole piece according to some embodiments of the present invention;

fig. 5 is a flowchart of a rolling detection method for a rolled pole piece according to some embodiments of the present invention;

FIG. 6 is a schematic diagram illustrating a determination logic of a controller according to some embodiments of the present invention;

fig. 7 is a flowchart of a rolling detection method for a rolled pole piece according to some embodiments of the present invention;

FIG. 8 is a schematic diagram illustrating a determination logic of a controller according to some embodiments of the present invention;

fig. 9 is a schematic diagram of a rolling detection device for rolling pole pieces according to some embodiments of the present invention.

Reference numerals in the specific embodiments are as follows:

the device comprises an unreeling mechanism 1, a front coating device 2, a front coating head 21, a front back roller 22, an oven 3, a roller 4, a deviation corrector 5, a deviation correcting roller 51, a back coating device 6, a back roller 61, a back coating head 62, a cold press roller 7, a first cold press upper roller 71, a first cold press lower roller 72, a second cold press upper roller 73, a second cold press lower roller 74, a rubber roller 8, a first reeling mechanism A, a second reeling mechanism B, a first sensor C and a second sensor D;

A third sensor E;

a fourth sensor F;

a processor 1001, a communication bus 1002, a user interface 1003, a network interface 1004, a memory 1005.

Detailed Description

Embodiments of the technical scheme of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and thus are merely examples, and are not intended to limit the scope of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; the terms "comprising" and "having" and any variations thereof in the description of the invention and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

In the description of embodiments of the present invention, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the invention. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present invention, the term "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present invention, the term "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means two or more (including two).

In the description of the embodiments of the present invention, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present invention.

In the description of the embodiments of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. It will be understood by those of ordinary skill in the art that the particular meaning of the terms described above in embodiments of the present invention should be understood in a specific sense, as the term is described herein merely to illustrate the present invention and not to limit the present invention.

Currently, the more widely the battery is used in view of the development of market situation. The battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and the like, as well as a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the battery application field, the market demand thereof is also continuously expanding.

The pole piece production process of the lithium battery comprises the following steps: the unreeling mechanism unreels the pole piece, the pole piece is walked to the front coating head to carry out front coating, the pole piece continues to walk through the front back roller after the front coating is finished, the pole piece is walked to the oven to carry out front drying, the pole piece continues to walk through the roller after the drying is finished, the pole piece walks to the back coating head to carry out reverse coating, the pole piece continues to walk through the back roller after the back coating is finished, the pole piece walks to the oven to carry out reverse drying, the pole piece walks to the cold-pressing roller to carry out rolling after the drying is finished, the pole piece is compacted by the glue roller after the rolling is finished, the pole piece continues to walk through the roller after the coating compaction, the pole piece continues to walk to the winding mechanism to carry out winding through the roller. In the above production procedure, the winding radius of the pole piece is usually measured by adopting an ultrasonic measurement technology, however, because the production environment of the pole piece of the lithium battery is complex, external factors such as temperature, magnetic field, mechanical vibration and the like influence the precision of ultrasonic waves, the ultrasonic sensor is easy to be interfered, and thus the measurement result is inaccurate.

In order to solve the problem that the measurement result is inaccurate due to the fact that the existing method for measuring the winding radius in the pole piece winding process is easy to interfere, the winding radius in the pole piece winding process can be calculated by utilizing the thickness of the pole piece after the pole piece is rolled and the winding number of turns of the pole piece winding, the winding radius in the pole piece winding process is calculated through an algorithm, the measurement result inaccuracy caused by interference of an ultrasonic sensor is avoided, and the accuracy of the winding radius is improved.

In some embodiments, as shown in fig. 1, a rolling detection system for a rolled pole piece is provided, where the rolling detection system for a rolled pole piece includes: a first sensor C, a second sensor D, and a controller; the first sensor C is used for obtaining the thickness of the pole piece after the pole piece is rolled in the process of rolling the pole piece after the rolling; the second sensor D is used for obtaining the winding turns of the pole piece in the winding process of the pole piece after the pair rolling; and the controller is used for calculating the winding radius of the pole piece in the winding process according to the thickness of the pole piece and the winding turns.

The first sensor C can be arranged above the pole piece after rolling, and the first sensor C can be a thickness gauge, so that the first sensor C can acquire the thickness of the pole piece after rolling. The thickness gauge may be an ultrasonic thickness gauge, a magnetic induction thickness gauge, a laser thickness gauge, etc., and in a specific implementation, the specific type of the thickness gauge may be preset according to specific requirements of a pole piece production process, which is not limited in this embodiment.

The second sensor D may be a proximity sensor, a photoelectric sensor, or the like, and in a specific implementation, the specific type of the second sensor D may be preset according to the specific requirements of the pole piece production process, which is not limited in this embodiment.

When the second sensor D is a proximity sensor, the specific step of obtaining the number of winding turns of the pole piece winding may be: 1. and (3) installing a proximity sensor: the proximity sensor is correctly arranged at a position with a certain distance from the surface of the winding shaft so as to ensure that enough space exists between the sensor and the winding shaft to avoid collision or interference; 2. determining the type of output signal of the sensor: determining the type of output signal of the proximity sensor used, such as a switch-type sensor (output on/off upon triggering) or an analog-type sensor (change in output voltage or current), for subsequent signal processing and counting; 3. a mark take-up shaft: marking the location on the take-up reel where it is detected by the proximity sensor may be accomplished using stripes, colors, reflective stickers, etc. to ensure that the mark is effectively detected by the proximity sensor; 4. setting a signal processing and counting device: setting corresponding signal processing and counting equipment according to the type of the output signal of the sensor; for a switch-type sensor, a counter, a microcontroller or other devices can be used to record the number of times the trigger signal is sent; for analog sensors, an analog-to-digital converter may be used to convert the signal to a digital signal for counting; 5. obtaining the winding number of turns of pole piece winding: when the winding shaft rotates and the proximity sensor detects the mark on the winding shaft, a trigger signal is generated, the times of the trigger signal are recorded, and the winding number of turns of the pole piece winding is obtained.

The photoelectric sensor may be a reflective photoelectric sensor, a photoelectric encoder, a magnetic encoder, a hall sensor, etc., and in a specific implementation, the specific type of the photoelectric sensor may be preset according to the specific requirement of the pole piece production process, which is not limited in this embodiment.

The reflective photoelectric sensor comprises a light emitter and a receiver, such as an infrared light emitter and a phototriode or a photodiode, a reflective mark (such as a reflective sticker or a mark with high reflectivity) is arranged on the winding shaft, when the winding shaft rotates, the reflective mark passes through a detection area of the sensor, infrared light emitted by the light emitter is received by the receiver after being reflected by the reflective mark, the intensity of detected light can change due to the existence or absence of the reflective mark, the number of times that the reflective mark passes through the sensor when the winding shaft rotates can be determined by detecting the change of an output signal of the receiver, and therefore the number of times that the winding shaft rotates can be calculated.

The photoelectric encoder comprises an emitter, a receiver and a grating disk arranged on a winding shaft, wherein a series of transparent and opaque stripes with fixed intervals are arranged on the grating disk, when the winding shaft rotates, the stripes on the grating disk can shade or transmit light rays between the emitter and the receiver, a light change signal detected by the receiver can be processed, and the number of the rotation turns of the winding shaft can be calculated according to the number and the characteristics of the stripes on the grating disk.

The magnetic encoder comprises a sensor and a magnetic mark arranged on the winding shaft, wherein the magnetic mark can be a magnet or a mark comprising magnetic materials, when the winding shaft rotates, the magnetic mark can cause the sensor to detect the change of a magnetic field, a magnetic field change signal detected by the sensor can be processed, and the number of the rotation turns of the winding shaft can be calculated according to the number and the characteristics of the magnetic mark.

The Hall sensor measures the intensity and the direction of a magnetic field by detecting the Hall voltage generated by the conductive material moving in the magnetic field based on the Hall effect, a mark or a magnetic ring with magnetic material is arranged on the winding shaft, when the winding shaft rotates, the magnetic mark can change the intensity of the magnetic field detected by the Hall sensor, and the frequency of the magnetic field change during each rotation can be determined by detecting the voltage signal change output by the Hall sensor, so that the number of the rotations of the winding shaft is calculated.

The controller can be a programmable logic controller (Programmable Logic Controller, PLC), and can be connected with the first sensor C and the second sensor D in a preset communication mode, so that the thickness of the pole piece after the pole piece is rolled and the winding number of the pole piece is detected by the first sensor C; the preset communication mode may be preset, for example, a bus communication mode may be the preset communication mode.

The step of calculating the winding radius of the pole piece in the winding process according to the thickness of the pole piece and the winding number can be to multiply the thickness of the pole piece with the winding number and add the multiplied result with the winding drum radius corresponding to the pole piece to obtain the winding radius of the pole piece in the winding process.

In a specific implementation, the winding radius in the pole piece winding process can be calculated by the following formula:

in the method, in the process of the invention,the winding number of turns in the winding process of the pole piece is +.>The winding radius at the time>Winding drum corresponding to pole pieceRadius (I)>The thickness of the pole piece after the pole piece is rolled.

As shown in fig. 1, the winding detection system for the rolled pole piece may further include: unreeling mechanism 1, front coating device 2, oven 3, roller 4, deviation rectifier 5, reverse coating device 6, cold press roll 7, rubber roll 8, first winding mechanism A (for example, winding shaft), second winding mechanism B (for example, winding shaft).

As shown in fig. 1, taking the calculation of the winding radius of the first winding mechanism a as an example for illustration, the pole piece production process of the lithium battery may be: the unwinding mechanism 1 is used for unreeling the pole piece, the pole piece is walked to the front coating head 21 for front coating, the pole piece is continuously walked through the front back roller 22 after the front coating is finished, the pole piece is continuously walked through the roller 4 after the drying is finished, when the front and back misplacement occurs on the pole piece, the correction roller 51 in the correction device 5 is used for correcting the correction, the pole piece is walked to the back coating head 62 for back coating, the pole piece is continuously walked through the back roller 61 after the back coating is finished, the pole piece is walked to the oven 3 for back drying, the pole piece is continuously walked to the cold pressing roller 7 after the drying is finished, the pole piece thickness after the rolling is obtained through the first cold pressing upper roller 71, the first cold pressing lower roller 72, the second cold pressing upper roller 73 and the second cold pressing lower roller 74, the pole piece thickness after the rolling is obtained through the rubber roller 8, the pole piece is continuously walked through the roller 4 after the rolling, the pole piece is respectively walked to the first rolling mechanism A and the second rolling mechanism B for rolling after the rolling, the second sensor D is used for obtaining the rolling up of the pole piece when the rolling up, the rolling mechanism A and the radius of the rolling mechanism B is not calculated according to the rolling mechanism A, and the radius of the rolling mechanism B is different from the step.

The controller can also be connected with other equipment in the rolling detection system of the rolling pole piece in a preset communication mode, and can also control the other equipment in the rolling detection system of the rolling pole piece in the preset communication mode.

In the embodiment, the thickness of the pole piece after the rolling of the pole piece and the rolling number of turns of the pole piece are obtained in the rolling process of the pole piece after the rolling of the pole piece, and the rolling radius of the pole piece in the rolling process is calculated according to the thickness of the pole piece and the rolling number of turns; the winding radius in the pole piece winding process is calculated by utilizing the thickness of the pole piece after the pole piece is rolled and the winding number of the pole piece is calculated, so that the winding radius in the pole piece winding process is calculated by an algorithm, inaccurate measuring results caused by interference of an ultrasonic sensor are avoided, and the accuracy of the winding radius is improved.

In some embodiments, considering that the pole piece itself is also thick, in order to calculate the winding radius of the pole piece during winding more accurately, the controller is further configured to multiply the thickness of the pole piece with the winding number of turns to obtain a theoretical radius corresponding to the winding number of turns; subtracting the thickness of the outer coating of the pole piece from the theoretical radius to obtain an actual radius corresponding to the winding turns; and obtaining the radius of the winding drum corresponding to the pole piece, and adding and calculating the radius of the winding drum and the actual radius corresponding to the winding turns to obtain the winding radius in the pole piece winding process.

The thickness of the rolled pole piece obtained by the first sensor C is the thickness of the paint on the front side and the back side of the pole piece, and the thickness of the paint to be removed is the thickness of the outer layer paint of the pole piece. Therefore, the thickness of the outer coating of the pole piece is equal to half of the thickness of the pole piece after the pole piece is rolled.

in the method, in the process of the invention,the winding number of turns in the winding process of the pole piece is +.>The winding radius at the time>For the radius of the winding drum corresponding to the pole piece, +.>The thickness of the pole piece after the pole piece is rolled is +.>The thickness of the outer coating of the pole piece.

In the embodiment, when the winding radius of the pole piece in the winding process is calculated, the thickness of the outer coating of the pole piece is also reduced, so that the influence of the thickness of the pole piece on the calculation result can be avoided, and the winding radius of the pole piece in the winding process can be calculated more accurately.

In some embodiments, as shown in fig. 2, the rolling detection system for rolling the pole piece further includes: a third sensor E; the third sensor E is used for measuring the winding radius in the winding process of the pole piece; the controller is further configured to compare the measured winding radius with the calculated winding radius, and generate maintenance information corresponding to the third sensor E according to a comparison result.

The third sensor E may be an ultrasonic sensor, and the specific step of measuring the winding radius of the pole piece during the winding process of the ultrasonic sensor may be to install the ultrasonic sensor at a position perpendicular to the surface of the winding shaft, so as to ensure a proper distance between the sensor and the winding surface, to allow the propagation and reflection of the ultrasonic wave, send an ultrasonic pulse signal to the winding shaft, receive an echo signal generated by the reflection of the ultrasonic wave on the winding shaft, and calculate the winding radius on the winding shaft by measuring the time delay or the oscillation period of the echo signal and combining the propagation speed of the ultrasonic wave.

Comparing the measured winding radius with the calculated winding radius, and generating maintenance information corresponding to the third sensor E according to the comparison result, wherein the maintenance information can be a difference value between the calculated winding radius and the measured winding radius, and when the difference value is larger than a preset first threshold value, the maintenance information corresponding to the third sensor E is generated. The preset first threshold may be preset according to actual requirements, for example, the maintenance information corresponding to the third sensor E may be "ultrasonic sensor failure, please check", and the maintenance information corresponding to the third sensor E may also be generated in real time according to a difference value, for example, the maintenance information may be "a difference value between the measured winding radius and the calculated winding radius is xx, please check", which is not limited in this embodiment.

In this embodiment, the third sensor E is configured to measure a winding radius in a winding process of the pole piece, and the controller is further configured to compare the measured winding radius with the calculated winding radius, so that the measured winding radius and the calculated winding radius can be referred to each other, and further, closed-loop control of the winding detection process can be implemented, and faults of the third sensor E can be found in time.

In some embodiments, the existing winding detection method cannot calculate the total winding length in the winding process of the pole piece, so, in order to overcome the above defect, the controller is further configured to multiply the winding radius by twice the circumference ratio to obtain the pole piece length corresponding to the winding number; the controller is also used for adding the pole piece lengths corresponding to the winding turns to obtain the total winding length in the pole piece winding process.

In a specific implementation, the length of the pole piece corresponding to the winding turns is calculated by the following formula:

in the method, in the process of the invention,the winding number of turns in the winding process of the pole piece is +.>Length of pole piece at time->Is of circumference rate>The winding number of turns in the winding process of the pole piece is +.>And (5) winding radius.

In a specific implementation, the total winding length in the pole piece winding process is calculated by the following formula:

In the method, in the process of the invention,the total winding number of turns in the winding process of the pole piece is +.>Total winding length at time, < > in>The winding number of turns in the winding process of the pole piece is +.>Length of pole piece at time->Is of circumference rate>The winding number of turns in the winding process of the pole piece is +.>The winding radius at the time>For the radius of the winding drum corresponding to the pole piece, +.>The thickness of the pole piece after the pole piece is rolled,/>the thickness of the outer coating of the pole piece.

In the embodiment, the total winding length in the pole piece winding process is calculated by using the winding radius in the pole piece winding process, so that the total winding length in the pole piece winding process can be accurately calculated.

In some embodiments, as shown in fig. 3, the rolling detection system for rolling the pole piece further includes: a fourth sensor F; the fourth sensor F is used for measuring the total winding length in the winding process of the pole piece; the controller is further configured to compare the measured total winding length with the calculated total winding length, and generate maintenance information corresponding to the fourth sensor F according to a comparison result.

The fourth sensor F can be an encoder, the encoder can be arranged on the rubber roller 8, the rubber roller 8 drives the pole piece to move along, and meanwhile, the encoder is driven to rotate, and the encoder measures the total winding length in the pole piece winding process.

Comparing the measured total winding length with the calculated total winding length, and generating maintenance information corresponding to the fourth sensor F according to the comparison result, wherein the maintenance information can be a difference value between the measured total winding length and the calculated total winding length, and when the difference value is larger than a preset second threshold value, the maintenance information corresponding to the fourth sensor F is generated. The preset second threshold value may be preset according to actual requirements, and the maintenance information corresponding to the fourth sensor F may be preset, for example, the maintenance information may be "the encoder or the rubber roller needs maintenance, please check".

In this embodiment, the fourth sensor F is configured to be used for comparing the measured total winding length with the calculated total winding length, and generating maintenance information corresponding to the fourth sensor F according to the comparison result, so as to implement mutual reference between the measured total winding length and the calculated total winding length, and further form closed-loop control with the fourth sensor F, so as to discover a fault of the fourth sensor F in time.

In some embodiments, the rolling detection system for rolling pole pieces further comprises: a rubber roller 8; the fourth sensor F is arranged on the rubber roller 8; the rubber roller 8 is used for driving the pole piece to move along and simultaneously driving the fourth sensor F to rotate, and measuring the total winding length in the pole piece winding process; the controller is further configured to compare the measured total winding length with the calculated total winding length, and detect whether the rubber roll 8 slips according to a comparison result.

In the present embodiment, the fourth sensor F is provided on the rubber roller 8; and the rubber roller 8 is used for driving the pole piece to move and simultaneously driving the fourth sensor F to rotate, so that the total winding length in the pole piece winding process is measured, and the rubber roller 8 can cause inaccurate total winding length measured by the fourth sensor F if slipping occurs. Therefore, in this embodiment, the measured total winding length may be compared with the calculated total winding length, and whether the rubber roll 8 slips may be detected according to the comparison result.

In this embodiment, the total winding length obtained by measurement is compared with the total winding length obtained by calculation, and whether the rubber roller 8 slips is detected according to the comparison result, so that the rubber roller 8 can be maintained in time.

In some embodiments, as shown in fig. 4, a rolling detection method of a rolled pole piece is provided, including:

step S10: and in the process of rolling the pole piece after the double-roll rolling, the thickness of the pole piece after the pole piece is rolled and the number of rolling turns of the pole piece.

The execution body of the embodiment may be a rolling detection device of a rolled pole piece with data processing, network communication and program running functions, for example, a controller, or other electronic devices capable of implementing the same or similar functions, which is not limited in this embodiment.

The specific steps of step S10 may be: in the process of rolling the pole piece after the rolling, the thickness of the pole piece after the rolling is obtained through the first sensor C, and the number of rolling turns of the pole piece after the rolling is obtained through the second sensor D.

Step S20: and calculating the winding radius of the pole piece in the winding process according to the thickness of the pole piece and the winding turns.

in the method, in the process of the invention,the winding number of turns in the winding process of the pole piece is +.>The winding radius at the time>For the radius of the winding drum corresponding to the pole piece, +.>The thickness of the pole piece after the pole piece is rolled.

In some embodiments, as shown in fig. 5, the step S20 includes:

step S201: and multiplying the thickness of the pole piece by the winding turns to obtain the theoretical radius corresponding to the winding turns.

Step S202: and subtracting the thickness of the outer coating of the pole piece from the theoretical radius to obtain the actual radius corresponding to the winding turns.

Step S203: and obtaining the radius of the winding drum corresponding to the pole piece, and adding and calculating the radius of the winding drum and the actual radius corresponding to the winding turns to obtain the winding radius in the pole piece winding process.

Acquiring a winding radius of the measured pole piece in the winding process;

In this embodiment, the winding radius of the pole piece in the winding process is measured by the third sensor E.

The first maintenance information may be maintenance information corresponding to the third sensor E, the measured winding radius is compared with the calculated winding radius, and the maintenance information corresponding to the third sensor E is generated according to the comparison result. The preset first threshold may be preset according to actual requirements, for example, the maintenance information corresponding to the third sensor E may be "ultrasonic sensor failure, please check", and the maintenance information corresponding to the third sensor E may also be generated in real time according to a difference value, for example, the maintenance information may be "a difference value between the measured winding radius and the calculated winding radius is xx, please check", which is not limited in this embodiment.

In this embodiment, the measured winding radius is compared with the calculated winding radius, so that the measured winding radius and the calculated winding radius can be mutually referenced, further closed-loop control of the winding detection process can be realized, and faults of the third sensor E can be found in time.

In order to unload in time, in this embodiment, an unloading instruction is generated when the difference between the measured winding radius and the calculated winding radius is within a first preset range and the winding radius meets a preset unloading condition. The first preset range can be preset, and when the controller sends a discharging instruction to the corresponding discharging equipment, the discharging equipment discharges. In this embodiment, besides generating the unloading instruction, an unloading prompt message may also be generated to remind the user that unloading is required.

For ease of understanding, the description is given with reference to fig. 6, but the present solution is not limited thereto. FIG. 6 is a schematic diagram of a judgment logic of the controller, in which whether the measured winding radius is consistent with the calculated winding radius data is judged, and if yes, a discharging instruction is generated; if not, judging that the ultrasonic sensor is out of order, and prompting staff to maintain in time.

In this embodiment, when the difference between the measured winding radius and the calculated winding radius is within the first preset range and the winding radius meets the preset unloading condition, an unloading instruction is generated, so that the automatic unloading can be performed in time.

In some embodiments, the existing winding detection method cannot calculate the total winding length in the pole piece winding process, so, in order to overcome the above-mentioned drawbacks, as shown in fig. 7, after the step S20, the method further includes:

step S30: and multiplying the calculated winding radius by twice the circumference ratio to obtain the length of the pole piece corresponding to the winding turns.

Step S40: and adding the pole piece lengths corresponding to the winding turns to obtain the total winding length in the pole piece winding process.

in the method, in the process of the invention,the total winding number of turns in the winding process of the pole piece is +.>Total winding length at time, < > in>The winding number of turns in the winding process of the pole piece is +.>Length of pole piece at time->Is of circumference rate>The winding number of turns in the winding process of the pole piece is +.>The winding radius at the time>For the radius of the winding drum corresponding to the pole piece, +.>The thickness of the pole piece after the pole piece is rolled is +.>The thickness of the outer coating of the pole piece.

The total winding length of the pole piece in the winding process is measured through a fourth sensor F, wherein the fourth sensor F can be an encoder, the encoder can be arranged on a rubber roller 8, the rubber roller 8 drives the pole piece to move along, and meanwhile, the encoder is driven to rotate, and the encoder measures the total winding length of the pole piece in the winding process.

In this embodiment, the measured total winding length is compared with the calculated total winding length, and maintenance information corresponding to the fourth sensor F is generated according to the comparison result, so that the measured total winding length and the calculated total winding length can be mutually referenced, and further closed-loop control can be formed between the measured total winding length and the calculated total winding length and the fourth sensor F, and faults of the fourth sensor F can be found in time.

In order to stop winding in time, in this embodiment, when the difference between the measured total winding length and the calculated total winding length is within a second preset range and the total winding length reaches a winding threshold, a winding stopping instruction is generated. The second preset range can be preset, and the winding mechanism stops winding after the controller sends the winding stopping instruction to the winding mechanism.

For ease of understanding, the description is given with reference to fig. 8, but the present solution is not limited thereto. FIG. 8 is a schematic diagram of a judgment logic of the controller, in which whether the measured total winding length is consistent with the calculated total winding length data is judged, if yes, the total winding length is output to a human-machine interface (Human Machine Interface, HMI) for display; if not, the maintenance of the encoder or the rubber roller is judged to be needed.

In this embodiment, when the difference between the measured total winding length and the calculated total winding length is within the second preset range and the total winding length reaches the winding threshold, a winding stopping instruction is generated, so that winding can be stopped in time.

In some embodiments, the pole piece thickness is an average pole piece thickness, and the rolling detection method of the rolled pole piece further includes:

In order to improve the accuracy of the pole piece thickness, in the embodiment, the pole piece thickness is an average pole piece thickness, pole piece thickness data of preset times are continuously collected in the process of rolling the pole piece after the rolling, and the average pole piece thickness is obtained through calculation according to the pole piece thickness data. The preset number of times may be preset, for example, 10000. In a specific implementation, for example, the thickness of the pole piece is the average value of the current continuous 10000 pieces of data detected by the thickness gauge.

In the embodiment, the thickness of the pole piece is the average pole piece thickness, in the process of rolling the pole piece after rolling, pole piece thickness data of preset times are continuously collected, and the average pole piece thickness is obtained through calculation according to the pole piece thickness data, so that the accuracy of the pole piece thickness can be improved.

In some embodiments, as shown in fig. 9, a rolling detection device for a rolled pole piece is also provided, where the rolling detection device for a rolled pole piece may include: a processor 1001, such as a central processing unit (Central Processing Unit, CPU), a communication bus 1002, a user interface 1003, a network interface 1004, a memory 1005. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display (Display), and the optional user interface 1003 may also include a standard wired interface, a wireless interface, and the wired interface for the user interface 1003 may be a USB interface in the present invention. The network interface 1004 may optionally include a standard wired interface, a Wireless interface (e.g., a Wireless-Fidelity (Wi-Fi) interface). The Memory 1005 may be a high-speed random access Memory (Random Access Memory, RAM) or a stable Memory (NVM), such as a disk Memory. The memory 1005 may also optionally be a storage device separate from the processor 1001 described above.

It will be appreciated by those skilled in the art that the configuration shown in fig. 7 is not limiting of the roll-up detection apparatus for a pair-roller pole piece and may include more or fewer components than shown, or certain components may be combined, or a different arrangement of components.

As shown in fig. 9, the memory 1005, which is considered to be a computer storage medium, may include an operating system, a network communication module, a user interface module, and a winding detection program for the roll pole piece.

In the rolling detection device for rolled pole piece shown in fig. 9, the network interface 1004 is mainly used for connecting a background server, and performing data communication with the background server; the user interface 1003 is mainly used for connecting user equipment; the rolling detection device of the rolled pole piece calls a rolling detection program of the rolled pole piece stored in the memory 1005 through the processor 1001, and executes the rolling detection method of the rolled pole piece provided by the embodiment of the invention.

In some embodiments, a storage medium is also provided, where a rolling detection program of the rolled pole piece is stored on the storage medium, and the rolling detection program of the rolled pole piece is executed by a processor to implement the rolling detection method of the rolled pole piece as described above.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention, and are intended to be included within the scope of the appended claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. The rolling detection method for the rolled pole piece is characterized by comprising the following steps of:

Calculating the winding radius of the pole piece in the winding process according to the thickness of the pole piece and the winding turns;

the rolling detection method of the rolled pole piece further comprises the following steps:

adding the pole piece lengths corresponding to the winding turns to obtain the total winding length in the pole piece winding process;

the winding radius in the pole piece winding process is calculated according to the thickness of the pole piece and the winding turns, and the method comprises the following steps:

2. The roll-up detection method of a rolled pole piece according to claim 1, further comprising:

acquiring a winding radius of the measured pole piece in the winding process;

3. The roll-up detection method of a rolled pole piece according to claim 2, further comprising:

4. The roll-up detection method of a rolled pole piece according to claim 1, further comprising:

5. The roll-up detection method of a rolled pole piece according to claim 4, further comprising:

6. A rolling detection method of a rolled pole piece according to any one of claims 1 to 3, characterized in that the pole piece thickness is an average pole piece thickness; the rolling detection method of the rolled pole piece further comprises the following steps:

7. The rolling detection equipment of roll-in pole piece, its characterized in that, rolling detection equipment of roll-in pole piece includes: the rolling detection method of the rolling pole piece comprises a memory, a processor and a rolling detection program of the rolling pole piece, wherein the rolling detection program of the rolling pole piece is stored in the memory and can run on the processor, and the rolling detection method of the rolling pole piece is realized when the rolling detection program of the rolling pole piece is executed by the processor.

8. A storage medium, wherein a rolling detection program of a rolled pole piece is stored on the storage medium, and the rolling detection program of the rolled pole piece realizes the rolling detection method of the rolled pole piece according to any one of claims 1 to 6 when executed by a processor.

9. The rolling detection system of the rolled pole piece is characterized by comprising: a first sensor, a second sensor, and a controller;

the controller is used for calculating the winding radius of the pole piece in the winding process according to the thickness of the pole piece and the winding turns;

the controller is further used for multiplying the winding radius by twice the circumference ratio to obtain the length of the pole piece corresponding to the winding turns;

the controller is also used for adding the pole piece lengths corresponding to the winding turns to obtain the total winding length in the pole piece winding process;

the controller is further used for multiplying the thickness of the pole piece by the winding turns to obtain a theoretical radius corresponding to the winding turns; subtracting the thickness of the outer coating of the pole piece from the theoretical radius to obtain an actual radius corresponding to the winding turns; and obtaining the radius of the winding drum corresponding to the pole piece, and adding and calculating the radius of the winding drum and the actual radius corresponding to the winding turns to obtain the winding radius in the pole piece winding process.

10. The roll-up detection system of claim 9, wherein the roll-up detection system of roll-up pole pieces further comprises: a third sensor;

11. The roll-up detection system of claim 9, wherein the roll-up detection system of roll-up pole pieces further comprises: a fourth sensor;

12. The roll-up detection system of claim 11, wherein the roll-up detection system of roll-up pole pieces further comprises: a rubber roller; the fourth sensor is arranged on the rubber roller;