Pole piece thickness control method and system

Abstract

The invention discloses a pole piece thickness control method and system, belongs to the technical field of batteries, and aims at solving the problem that in the prior art, the pole piece thickness precision is not high, and the method comprises the steps that an upper computer obtains current pole piece thickness data in real time; according to a comparison result of the target thickness threshold value and the pole piece thickness data, obtaining a pole piece abnormal result and accumulating pole piece abnormal times; an equipment pole piece thickness adjusting model is adopted to analyze the pole piece abnormal result, and an equipment parameter adjusting instruction is obtained; generating an equipment alarm message according to a comparison result of the abnormal frequency threshold value and the accumulated pole piece abnormal frequency; and respectively issuing the equipment parameter adjusting instruction and the equipment alarm message to the rolling equipment to execute main roller spacing adjustment and pressure adjustment and output alarm information. In the pole piece thickness control process, the thickness abnormity can be judged in real time according to the pole piece thickness measurement data, the roll gap distance and pressure of different areas of the rolling equipment are dynamically adjusted, the yield of the pole piece thickness is increased, and the production line cost is reduced.

Description

Technical Field

[0001] The invention relates to a method and system for controlling the thickness of a pole piece, and belongs to the technical field of batteries. Background Art

[0002] Since the charging and discharging process is carried out locally on the electrode sheet, inconsistent electrode sheet thickness will increase the resistance at the interface between the electrode material and the electrolyte, reduce the cell capacity, and affect the battery performance; the traditional electrode sheet thickness control method relies too much on manual processing control, which makes the control processing time too long, resulting in production capacity loss and waste of labor hours; secondly, the manual control process causes the electrode sheet thickness to fluctuate significantly, and it is impossible to ensure the consistency of the thickness of multiple areas of the electrode sheet, which results in a low electrode sheet qualification rate and high production costs.

[0003] Although the existing technology uses control models and automated equipment to automate the thickness of the electrode, which can effectively reduce fluctuations during control operations and improve the accuracy of electrode thickness operations, most of the control parameters of industrial control are trained on the basis of historical data. In particular, when producing electrodes of different models and specifications, subsequent adjustments are only made based on existing experience, and the consistency of the current electrode thickness cannot be guaranteed. Therefore, in the actual production process, the thickness of the current electrode cannot be adjusted in real time, resulting in a low pass rate in electrode production. Summary of the invention

[0004] Purpose of the invention: The present invention provides a method and system for controlling the thickness of an electrode, which can solve the shortcomings of the prior art. In the process of controlling the thickness of an electrode, it can judge in real time whether to switch the main roller adjustment strategy for abnormal thickness of the electrode according to the electrode thickness measurement data, dynamically adjust the roller gap spacing and pressure in different areas of the rolling equipment, improve the yield rate of the electrode thickness and reduce the production line cost.

[0005] In order to solve the above technical problems, the present invention is implemented by adopting the following technical solutions:

[0006] A method for controlling the thickness of a pole piece, comprising:

[0007] The host computer obtains the current electrode thickness data in real time;

[0008] According to the comparison result between the target thickness threshold and the pole piece thickness data, the pole piece abnormality result is obtained and accumulated;

[0009] The equipment pole piece thickness adjustment model is used to analyze the pole piece abnormal results and obtain the equipment parameter adjustment instructions;

[0010] Generate a device alarm message based on the comparison result between the abnormal number threshold and the accumulated electrode abnormal results;

[0011] The adjustment instructions and equipment alarm messages are respectively sent to the roller pressing equipment to execute main roller spacing adjustment, pressure adjustment and output alarm information.

[0012] The host computer in the present invention obtains the current pole piece thickness data, judges and evaluates the current pole piece thickness data, and quickly obtains the pole piece thickness abnormal value and the area associated with the abnormal value; the equipment is adjusted in real time according to the area associated with the abnormal value, and the corresponding equipment parameter adjustment instruction is generated, thereby forming a closed-loop feedback mechanism between the host computer and the rolling equipment, so as to achieve the purpose of real-time adjustment of the current pole piece thickness; compared with other control methods using historical data models, it can effectively reduce the error in actual control and reduce production costs.

[0013] Optionally, the host computer obtains the current electrode thickness data in real time, including:

[0014] When the pole piece enters the rolling equipment, the upper computer controls the laser displacement sensor to move and scan along the width direction of the pole piece to obtain multiple laser signals in multiple primary areas;

[0015] Perform distance calculation on multiple laser signals to obtain pole piece thickness data of multiple primary regions;

[0016] Directionally grouping the pole piece thickness data of multiple primary regions based on the main roller position to obtain data groups of the first direction, second direction and third direction regions of the main roller;

[0017] The data groups in each area are processed by averaging to obtain the mean values ​​of the pole piece thickness in the three directions of the main roller.

[0018] The present invention can adjust the sampling frequency of the laser displacement sensor and the moving speed of the sensor according to the change of the pole piece transmission speed, thereby ensuring that the pole piece can be measured in all directions; secondly, the number of sensors, the amount of pole piece thickness data collected and the area division data can be adjusted according to the change of the pole piece width, the sampling frequency of the laser displacement sensor and the pole piece transmission speed, so that the present invention can be flexibly applied to pole pieces of various sizes and models.

[0019] Optionally, based on the comparison result between the target thickness threshold and the pole piece thickness data, the pole piece abnormality result is obtained, including:

[0020] The mean value of the electrode thickness in each direction area is compared with the corresponding target thickness threshold. If the electrode thickness value in each direction area is within the corresponding target thickness threshold range, the electrode is normal.

[0021] If the mean value of the pole piece thickness in any direction area deviates from the corresponding target thickness threshold range, a pole piece abnormal result is obtained.

[0022] In the present invention, multi-point measurements are performed on the same width direction of the pole piece, and the thickness change in the direction of movement of the pole piece is obtained in real time. The data of multiple primary areas obtained are judged one by one, so that the measurement of the thickness of the pole piece is more refined and quantitative, and the uneven thickness of the entire pole piece is fundamentally eliminated.

[0023] Optionally, the device pole piece thickness adjustment model is used to analyze the pole piece abnormality result to obtain the device parameter adjustment instruction, including:

[0024] Import the data group of the area associated with the abnormal results of the pole piece into the equipment pole piece thickness adjustment model to obtain the adjustment strategy that the main roller needs to execute;

[0025] Generate equipment parameter adjustment instructions based on the adjustment strategy that the main roller needs to execute, and send them to the rolling equipment to adjust the spacing and pressure of the equipment's rolling area.

[0026] The present invention also uses the deep learning technology of the feedforward system to carry out targeted training on the main roller position and roller pressure adjustment strategy to control the pole piece thickness, so as to obtain the equipment pole piece thickness adjustment model; at the same time, in order to avoid the overfitting phenomenon of the training model results, a feedback mechanism is added on the basis of the powerful computing power of the existing training model, and the powerful analytical ability of the training model is combined with the stability of the feedback mechanism, so as to continuously correct the roller gap spacing and pressure of the rolling equipment, so as to keep the pole piece thickness within the set thickness range in real time, and avoid the problems of low prediction result accuracy and low product qualification rate caused by relying solely on the data model.

[0027] Optionally, a device parameter adjustment instruction is generated according to the adjustment strategy to be executed by the main roller, and sent to the rolling device to adjust the spacing and pressure of the rolling area of ​​the device, including:

[0028] Identify the area associated with the pole piece abnormal result. When the area associated with the pole piece abnormal result is the first direction area, the second direction area or the third direction area of ​​the main roller, substitute the data group of the corresponding area into the first direction area adjustment strategy, the second direction area adjustment strategy or the third direction area adjustment strategy of the main roller for calculation, and obtain the main roller gap spacing of the adjusted first direction area, the second direction area or the third direction area of ​​the main roller;

[0029] Generate corresponding equipment parameter adjustment instructions based on the main roller gap spacing in the first direction area, second direction area or third direction area of ​​the main roller, and send them to the rolling equipment to control the rolling equipment to adjust the roller gap spacing and pressure in the first direction area, second direction area or third direction area of ​​the main roller.

[0030] The expression of the adjustment strategy of the first direction area of ​​the main roller is:

[0031]

[0032] In the formula, To adjust the roller gap distance in the first direction area of ​​the main roller, They are the pole piece thickness values ​​of the first data group and the second data group in the first direction area of ​​the main roller, is the standard thickness of the electrode process, h is the adjustment amount, The initial position value of the main roller;

[0033] The expression of the adjustment strategy of the third direction area is:

[0034]

[0035] In the formula, To adjust the roller gap distance in the third direction area, The pole piece thickness values ​​of the first data group and the second data group in the third direction area respectively;

[0036] The expression of the second direction area adjustment strategy is:

[0037]

[0038]

[0039] In the formula, To adjust the roller gap distance in the second direction area, is the pressure adjustment value, is the initial pressure value, are the pole piece thickness values ​​of the first data group, the second data group and the third data group in the second direction area, respectively. They are the pole piece thickness coefficient and the pole piece pressure coefficient respectively.

[0040] In the present invention, adjustment areas and adjustment priorities are divided according to the shape of the main roller itself, which can cover thickness abnormality scenarios caused by various situations such as changes in the pole piece transmission speed, changes in the rolling speed and rolling rebound, so that the thickness abnormality areas before and after pressing can have independent adjustment strategies and ensure flexible switching between adjustment strategies, ultimately ensuring the stability of the rolling process and the uniformity of the overall thickness of the pole piece, reducing the thickness fluctuation of the pole piece.

[0041] Optionally, it also includes receiving a device reset signal;

[0042] The accumulated pole piece abnormality results are cleared according to the received device reset signal, and the pole piece abnormality times are accumulated again; the amount of data can be reduced, and the purpose of automatically clearing cached data is achieved, thereby improving the analysis and calculation speed.

[0043] A pole piece thickness control system, comprising:

[0044] Thickness measurement unit, evaluation unit, command generation unit, communication unit and alarm unit;

[0045] The thickness measuring unit is used to obtain the current pole piece thickness data in real time;

[0046] The evaluation unit is used to obtain the pole piece abnormality result and accumulate the number of pole piece abnormalities according to the comparison result between the target thickness threshold and the pole piece thickness data;

[0047] The instruction generation unit is used to analyze the abnormal results of the pole piece by using the equipment pole piece thickness adjustment model to obtain the equipment parameter adjustment instruction;

[0048] The alarm unit is used to generate a device alarm message according to a comparison result between the abnormal number threshold and the accumulated number of pole piece abnormalities;

[0049] The communication unit is used to send equipment parameter adjustment instructions and equipment alarm messages to the rolling equipment to execute main roller spacing adjustment, pressure adjustment and output alarm information.

[0050] The system of this embodiment can realize the functional control of the thickness of the pole piece without the aid of complex calculation models and software; secondly, the functions of each unit are streamlined, and the powerful analysis ability of the integrated feedforward system and the real-time adjustment advantages of the closed loop of the feedback system are combined. At the same time, it has a data cache clearing function to release system resources, improve the system's operating speed and responsiveness, and make the system more lightweight, efficient and stable.

[0051] Optionally, the thickness measuring unit communicates with a thickness gauge;

[0052] The thickness gauge includes a laser displacement sensor formed in an up-and-down manner, and the laser displacement sensor is installed on the first moving module;

[0053] The first moving module is disposed corresponding to the upper and lower surfaces of the pole piece, and drives the laser displacement sensor to move along the width direction of the pole piece;

[0054] The thickness gauge is electrically connected to the host computer to provide real-time feedback of the thickness data of the electrode;

[0055] The thickness gauge calculates and transforms the laser displacement sensor through a digital signal processor to obtain an analog signal of the pole piece thickness in the area scanned by the laser displacement sensor, and then converts the analog signal into a data signal again through a signal processor to obtain the current pole piece thickness data.

[0056] The working principle of the laser displacement sensor measurement in the present invention is the laser triangulation method, in which a visible red laser is directed to the surface of the object to be measured through a lens, and the laser reflected by the object passes through a receiver lens, is received by an internal CCD linear camera and is calculated, thereby obtaining the pole piece thickness data; the thickness gauge controller calculates the pole piece thickness T according to the measurement distance S(A) from the laser displacement sensor to the upper surface of the pole piece, the measurement distance S(B) from the laser displacement sensor to the lower surface of the pole piece and the total distance S(C) between the upper and lower projections of the laser displacement sensor, that is, T=S(C)-S(A)-S(B), directly and effectively obtaining the relevant physical quantities, reducing the calculation and resource occupation of the host computer; finally, through the movement of the first mobile module and the transmission of the pole piece, the pole piece as a whole is continuously and comprehensively measured at multiple points, thereby improving the accuracy of the pole piece thickness control.

[0057] Optionally, the communication unit communicates with a roller pressing device controller;

[0058] Wherein, the rolling equipment comprises: a second movable module, a main roller, a connecting frame and an alarm device;

[0059] The two radial sides of the main roller are connected to the second movable module through two connecting frames, and the main roller is located above the pole piece;

[0060] The second moving module is electrically connected to the roller pressing device controller, and is used to independently control the second moving module to respectively drive the two radial sides and the middle of the main roller to move longitudinally relative to the pole piece, so as to adjust the roller gap spacing and pressure of the pole piece relative to the first direction area, the second direction area and the third direction area of ​​the main roller;

[0061] The alarm device is electrically connected to the roller pressing equipment controller, and includes an alarm light and a buzzer, which are used to output alarm information under the control of the roller pressing equipment controller, so as to facilitate users to repair the roller pressing equipment and the pole piece in time.

[0062] In the present invention, the second movable module is used to drive the radial sides and the middle of the main roller to move up and down flexibly, thereby controlling the different roller gap spacings on the radial sides and the middle of the main roller to meet the dynamic control under the fluctuation of the pole piece thickness before and after the rolling process; secondly, an alarm function is added when frequent adjustment occurs to remind equipment personnel to check, repair and adjust the equipment in time.

[0063] Optionally, the rolling equipment is also provided with an alarm reset button. When the user completes the maintenance of the equipment and the pole piece, the alarm reset button is used to send an equipment reset signal to the rolling equipment controller, and the signal is forwarded to the communication unit, so that the evaluation unit clears the accumulated number of pole piece abnormalities and re-accumulates them. This can achieve the purpose of clearing the data cache, thereby reducing memory usage and improving parsing and calculation speeds.

[0064] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0065] 1. The method of the present invention forms a closed-loop feedback mechanism between the host computer and the rolling equipment, so as to achieve the purpose of real-time adjustment of the current electrode thickness; compared with other control methods using historical data models, it can effectively reduce the error in actual control and reduce production costs.

[0066] 2. The adjustment areas and adjustment priorities are divided according to the shape of the main roller itself, which can cover the thickness anomalies and thickness fluctuations caused by various situations such as changes in the electrode conveying speed, changes in the rolling speed and rolling rebound, so that the thickness abnormality areas before and after pressing can have independent adjustment strategies and ensure flexible switching between adjustment strategies, ultimately ensuring the stability of the rolling process and the uniformity of the overall thickness of the electrode, avoiding more obvious thickness fluctuations in the overall electrode.

[0067] 3. The sampling frequency and sensor moving speed of the laser displacement sensor can be adjusted according to the change of the pole piece transmission speed, thereby ensuring that the pole piece can be measured in all directions. Secondly, the number of sensors, the amount of pole piece thickness data collected and the number of areas can also be adjusted, so that the present invention can be flexibly applied to pole pieces of various sizes and models.

[0068] 4. With the help of the deep learning technology of the feedforward system, the main roller position and roller pressure adjustment strategy are trained specifically to control the electrode thickness, and the equipment electrode thickness adjustment model is obtained; at the same time, in order to avoid the overfitting phenomenon of the training model results, a feedback mechanism is added on the basis of the powerful computing power of the existing training model, and the powerful analytical ability of the training model is combined with the stability of the feedback mechanism. The roller gap spacing and pressure of the rolling equipment are continuously corrected to control the electrode thickness in real time to keep it within the set thickness range, avoiding the problems of low prediction accuracy and low product qualification rate caused by relying solely on data models. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] Figure 1 Shown is a schematic flow chart of a method for controlling the thickness of a pole piece according to the present invention;

[0070] Figure 2 The figure shows a working schematic diagram of the laser displacement sensor of the present invention;

[0071] Figure 3 The figure shows a schematic diagram of the installation structure of the laser displacement sensor of the present invention;

[0072] Figure 4 The figure shows a schematic diagram of the main roller installation structure of the present invention;

[0073] Figure 5 The figure shows a schematic diagram of the main roller position adjustment of the present invention;

[0074] Figure 6 Shown is a schematic diagram of thickness data of the thickness gauge software of the present invention.

[0075] Figure numerals: 101-laser displacement sensor, 102-incident light of laser displacement sensor, 103-reflected light of laser displacement sensor, 104-pole piece, 105-measured distance S(A) of upper surface, 106-measured distance S(B) of lower surface, 107-total distance S(C) of upper and lower projections of sensor, 108-first movable module, 109-sensor fixing bracket, 110-main roller, 111-connecting frame, 112-second movable module, 113-first radial side of main roller, 114-second radial side of main roller, 115-first side roller gap spacing, 116-second side roller gap spacing, 117-middle roller gap spacing of main roller. DETAILED DESCRIPTION

[0076] In order to more fully understand the technical content of the present invention, the technical solution of the present invention is further introduced and illustrated in conjunction with specific embodiments below, but is not limited thereto.

[0077] Example 1

[0078] This embodiment proposes a new method for controlling the thickness of the electrode. Figure 1 Shown include:

[0079] Step 1: The host computer obtains the current electrode thickness data in real time;

[0080] Step 2: According to the comparison result between the target thickness threshold and the pole piece thickness data, the pole piece abnormality result is obtained and the number of pole piece abnormalities is accumulated;

[0081] Step 3: Use the equipment pole piece thickness adjustment model to analyze the pole piece abnormal results and obtain equipment parameter adjustment instructions;

[0082] Step 4: Generate a device alarm message based on the comparison result between the abnormal number threshold and the accumulated number of electrode abnormalities;

[0083] Step 5: Send the equipment parameter adjustment command and equipment alarm message to the roller pressing equipment to perform main roller spacing adjustment, pressure adjustment and output alarm information.

[0084] The host computer in this embodiment obtains the current pole piece thickness data, judges and evaluates the current pole piece thickness data, and quickly obtains the pole piece thickness abnormal value and the area associated with the abnormal value; the equipment is adjusted in real time according to the main roller direction area associated with the abnormal value, and the corresponding adjustment instructions are generated, thereby forming a closed-loop feedback mechanism between the host computer and the rolling equipment, so as to achieve the purpose of real-time adjustment of the current pole piece thickness; compared with other control methods using historical data models, it can effectively reduce errors in actual control and reduce production costs.

[0085] Among them, the equipment pole piece thickness adjustment model is constructed by RNN recurrent neural network or ANN artificial neural network and linear regression method, and the pole piece rolling data of different models are input into the neural network for training to obtain the optimized equipment pole piece thickness adjustment model, so that the equipment pole piece thickness adjustment model has linear regression analysis ability and can predict the linear change relationship between the main roller adjustment amount and the pressure value.

[0086] Optionally, the host computer obtains the current electrode thickness data in real time, including:

[0087] When the pole piece enters the rolling equipment, the upper computer controls the laser displacement sensor to move and scan along the width direction of the pole piece to obtain multiple laser signals in multiple primary areas;

[0088] Perform distance calculation on multiple laser signals to obtain pole piece thickness data of multiple primary regions;

[0089] Directionally grouping the pole piece thickness data of multiple primary regions based on the main roller position to obtain data groups of the first direction, second direction and third direction regions of the main roller;

[0090] The data groups in each area are processed by averaging to obtain the mean values ​​of the pole piece thickness in the three directions of the main roller.

[0091] This embodiment can adjust the sampling frequency of the laser displacement sensor and the sensor movement speed according to the change of the pole piece transmission speed, thereby ensuring that the pole piece can be measured in all directions; secondly, the number of sensors, the amount of pole piece thickness data collected and the area division data can be adjusted according to the changes in the pole piece width, the sampling frequency of the laser displacement sensor and the pole piece transmission speed, so that the present invention can be flexibly applied to pole pieces of various sizes and models.

[0092] Optionally, based on the comparison result between the target thickness threshold and the pole piece thickness data, the pole piece abnormality result is obtained, including:

[0093] The mean value of the electrode thickness in each direction area is compared with the corresponding target thickness threshold. If the electrode thickness value in each direction area is within the corresponding target thickness threshold range, the electrode is normal.

[0094] If the mean value of the pole piece thickness in any direction area deviates from the corresponding target thickness threshold range, a pole piece abnormal result is obtained.

[0095] In this embodiment, multi-point measurements are performed on the same width direction of the pole piece, and the thickness change in the direction of movement of the pole piece is obtained in real time. The data of multiple areas obtained are judged one by one, so that the measurement of the thickness of the pole piece is more refined and quantitative, fundamentally eliminating the problem of uneven overall thickness of the pole piece.

[0096] Optionally, the device pole piece thickness adjustment model is used to analyze the pole piece abnormality result to obtain the device parameter adjustment instruction, including:

[0097] Import the data group of the direction area associated with the abnormal result of the pole piece into the equipment pole piece thickness adjustment model to obtain the adjustment strategy that the main roller needs to execute;

[0098] Generate equipment parameter adjustment instructions based on the adjustment strategy that the main roller needs to execute, and send them to the rolling equipment to adjust the spacing and pressure of the equipment's rolling area.

[0099] This embodiment also uses the deep learning technology of the feedforward system to optimize the main roller position and roller pressure adjustment strategy for controlling the electrode thickness and conducts a large amount of training to obtain the equipment electrode thickness adjustment model. A feedback mechanism is added on the basis of the training model to combine the powerful analytical ability of the training model with the stability of the feedback mechanism. Based on the powerful computing power of the network model, the feedback mechanism is used to continuously correct the roller gap spacing and pressure of the rolling equipment, so that the electrode thickness is maintained within the set thickness range in real time, avoiding the problems of low prediction accuracy and low product qualification rate caused by relying solely on data models.

[0100] Optionally, a device parameter adjustment instruction is generated according to the adjustment strategy to be executed by the main roller, and sent to the rolling device to adjust the spacing and pressure of the rolling area of ​​the device, including:

[0101] Identify the direction area associated with the pole piece abnormal result. When the direction area associated with the pole piece abnormal result is the first direction area, the second direction area or the third direction area of ​​the main roller, substitute the data group of the corresponding area into the first direction area adjustment strategy, the second direction area adjustment strategy or the third direction area adjustment strategy of the main roller for calculation, and obtain the main roller gap spacing of the adjusted first direction area, the second direction area or the third direction area of ​​the main roller;

[0102] Generate corresponding equipment parameter adjustment instructions based on the main roller gap spacing in the first direction area, second direction area or third direction area of ​​the main roller, and send them to the rolling equipment to control the rolling equipment to adjust the roller gap spacing and pressure in the first direction area, second direction area or third direction area of ​​the main roller.

[0103] The expression of the adjustment strategy of the first direction area of ​​the main roller is:

[0104]

[0105] In the formula, To adjust the roller gap distance in the first direction area of ​​the main roller, They are the pole piece thickness values ​​of the first data group and the second data group in the first direction area of ​​the main roller, is the standard thickness of the electrode process, h is the adjustment amount, The initial position value of the main roller;

[0106] The expression of the adjustment strategy of the third direction area is:

[0107]

[0108] In the formula, To adjust the roller gap distance in the third direction area, The pole piece thickness values ​​of the first data group and the second data group in the third direction area respectively;

[0109] The expression of the second direction area adjustment strategy is:

[0110]

[0111]

[0112] In the formula, To adjust the roller gap distance in the second direction area, is the pressure adjustment value, is the initial pressure value, are the pole piece thickness values ​​of the first data group, the second data group and the third data group in the second direction area, respectively. They are the pole piece thickness coefficient and the pole piece pressure coefficient respectively.

[0113] In this embodiment, the first direction area of ​​the main roller is the left side area of ​​the main roller, the second direction area is the middle area of ​​the main roller, and the third direction area is the right side area of ​​the main roller. The adjustment areas and adjustment priorities are divided according to the shape of the main roller itself, which can cover the thickness anomalies caused by various situations such as changes in the pole piece transmission speed, changes in the rolling speed and rolling rebound, so that the thickness abnormality areas before and after pressing can have independent adjustment strategies and ensure flexible switching between adjustment strategies, ultimately ensuring the stability of the rolling process and the uniformity of the overall thickness of the pole piece, reducing the thickness fluctuation of the pole piece.

[0114] Optionally, it also includes receiving a device reset signal;

[0115] The accumulated pole piece abnormality results are cleared according to the received device reset signal, and the pole piece abnormality times are accumulated again; the amount of data can be reduced, and the purpose of automatically clearing cached data is achieved, thereby improving the analysis and calculation speed.

[0116] Example 2

[0117] This embodiment provides a pole piece thickness control system, including:

[0118] Thickness measurement unit, evaluation unit, command generation unit, communication unit and alarm unit;

[0119] The thickness measuring unit is used to obtain the current pole piece thickness data in real time;

[0120] The evaluation unit is used to obtain the pole piece abnormality result and accumulate the number of pole piece abnormalities according to the comparison result between the target thickness threshold and the pole piece thickness data;

[0121] The instruction generation unit is used to analyze the abnormal results of the pole piece by using the equipment pole piece thickness adjustment model to obtain the equipment parameter adjustment instruction;

[0122] The alarm unit is used to generate an equipment alarm message according to the comparison result between the abnormal number threshold and the accumulated number of pole piece abnormalities;

[0123] The communication unit is used to send equipment parameter adjustment instructions and equipment alarm messages to the rolling equipment to execute main roller spacing adjustment, pressure adjustment and output alarm information.

[0124] The system of this embodiment can realize the functional control of the thickness of the pole piece without the aid of complex calculation models and software; secondly, the functions of each unit are streamlined, and the powerful analysis ability of the integrated feedforward system and the real-time adjustment advantages of the closed loop of the feedback system are combined. At the same time, it has a data cache clearing function to release system resources, improve the system's operating speed and responsiveness, and make the system more lightweight, efficient and stable.

[0125] Optionally, the thickness measuring unit communicates with the thickness gauge;

[0126] The thickness gauge includes a laser displacement sensor 101 formed in an up-and-down manner, and the laser displacement sensor 101 is mounted on a first moving module 108 via a sensor fixing bracket 109;

[0127] The first moving module 108 is disposed corresponding to the upper and lower surfaces of the pole piece 104, and drives the laser displacement sensor 101 to move along the width direction of the pole piece 104; Figure 2 and Figure 3 The first movable module 108 shown is arranged corresponding to the upper and lower surfaces of the pole piece 104, and drives the laser displacement sensor 101 to move along the width direction of the pole piece 104; the first movable module 108 is composed of a motor and a screw or a linear motion mechanism or a synchronous belt and is not limited to other linear motion mechanisms. The laser displacement sensor 101 is installed on the linear motion mechanism, scans from the upper and lower surfaces of the pole piece 104, and moves in the same direction along the width direction of the pole piece 104 under the drive of the motor. At the same time, the pole piece is continuously transported to the rolling equipment along the transmission mechanism to obtain the thickness values ​​of various areas of the pole piece 104 during the rolling process.

[0128] The thickness gauge is electrically connected to the host computer to provide real-time feedback of the electrode thickness data;

[0129] The thickness gauge calculates and transforms the laser displacement sensor 101 through a digital signal processor to obtain an analog signal of the pole piece thickness in the area scanned by the laser displacement sensor 101, and then converts the analog signal into a data signal again through a signal processor to obtain the current pole piece thickness data.

[0130] Figure 2 After the laser displacement sensor 101 emits the laser displacement sensor incident light 102 to the upper and lower surfaces of the pole piece 104, it receives the laser displacement sensor reflected light 103 reflected by the pole piece 104. The working principle of the laser displacement sensor 101 in this embodiment is the laser triangulation measurement method. A visible red laser is emitted to the surface of the object to be measured through a lens. The laser reflected by the object passes through the receiver lens and is received by the internal CCD linear camera to calculate different laser distances. The CCD linear camera can capture the reflected light spots at different angles at the same time, obtain the reflection angle, and based on this reflection angle and the known distance between the laser and the camera, the digital signal processor can calculate the distance between the sensor and the object to be measured, that is, the current pole piece thickness data is obtained. The thickness gauge controller calculates the thickness T of the pole piece 104 based on the measured distance S(A) 105 from the laser displacement sensor 101 to the upper surface of the pole piece, the measured distance S(B) 106 from the laser displacement sensor 101 to the lower surface of the pole piece, and the total distance S(C) 107 between the upper and lower projections of the sensor, that is, T=S(C)-S(A)-S(B), thereby directly and effectively obtaining relevant physical quantities and reducing the calculation and resource occupation of the host computer; finally, through the movement of the first mobile module 108 and the transmission of the pole piece 104, the pole piece 104 is continuously and comprehensively measured at multiple points as a whole, thereby improving the accuracy of thickness control of the pole piece 104.

[0131] In addition, the servo or frequency conversion control system controls the motor to drive the required structure to move in one direction or two directions. The module drives the laser displacement sensor 101 to move through a linear motor, a lead screw or a synchronous belt, making the measurement process more automated.

[0132] The thickness gauge sends the thickness value T of the pole piece 104 to the host computer. The host computer software compares the thickness T value of the pole piece 104 with the target thickness T' of the pole piece 104. If the thickness T of the pole piece 104 is within the target thickness T' range, the equipment operates normally; if the thickness T of the pole piece 104 deviates from the target thickness T' range, the thickness abnormality correlation area is obtained based on the correlation model built by deep learning and further data analysis is performed. After analysis, the adjustment instructions of the main roller gap spacing value L and the roller pressure value P are generated, and then the adjustment instructions are sent to the equipment through Modbus. TCP protocol is sent to the roller press equipment controller; two arrays A1{1...1000} and A2{1...1000} are reserved in the roller press equipment controller. Array A1{1...1000} is used to temporarily store 1000 groups of result data of the position of the main roller 110, and array A2{1...1000} is used to temporarily store 1000 groups of result data of the roller pressure. The stored data in arrays A1{1...1000} and A2{1...1000} are used to feed back to the host computer, such as Figure 6 The thickness data group shown is analyzed through threshold judgment and input association model to identify the directional area associated with the pole piece abnormal result, so as to obtain the adjustment strategy required for the main roller according to the directional area, and substitute the data group of the abnormal area into the corresponding adjustment strategy to calculate the corresponding roller gap spacing value, thereby generating the equipment parameter adjustment instruction.

[0133] When the data of arrays A1{1...1000} and A2{1...1000} are completely received by the host computer software, the rolling equipment controller immediately clears the arrays A1{1...1000} and A2{1...1000}. After receiving the equipment parameter adjustment instruction, the rolling equipment controller issues instructions to the second movable module 112 of the adjustment mechanism according to the main roller gap spacing value L and the roller pressure value P, and finally the second movable module 112 drives the two radial sides of the main roller 110 to perform corresponding adjustment actions.

[0134] Optionally, the communication unit communicates with a roller pressing device controller, wherein the roller pressing device includes: a second movable module 112, a main roller 110, a connecting frame 111 and an alarm device;

[0135] The two radial sides of the main roller 110 are connected to the second moving module 112 through two connecting frames 111 respectively, and the main roller 110 is located above the pole piece 104;

[0136] The second moving module 112 is electrically connected to the roller pressing device controller, and is used to independently control the second moving module 112 to respectively drive the radial first side edge 113, the radial second side edge 114 and the middle of the main roller to perform longitudinal movement relative to the pole piece 104, wherein the radial first side edge 113 of the main roller is located in the left area of ​​the main roller, i.e., the first direction area of ​​the main roller, the middle is the middle area of ​​the main roller, i.e., the second direction area, and the second side edge 114 is located in the right area of ​​the main roller, i.e., the third direction area, so that the roller gap spacing 115 in the first direction area of ​​the main roller, the roller gap spacing 116 in the third direction area, and the roller gap spacing 117 in the second direction area can be adjusted, and the rolling pressure can be adjusted simultaneously when the spacing is adjusted;

[0137] The alarm device is electrically connected to the roller pressing equipment controller, and includes an alarm light and a buzzer, which are used to output alarm information under the control of the roller pressing equipment controller, so as to facilitate users to repair the roller pressing equipment and the pole piece 104 in time.

[0138] In this embodiment, the second movable module 112 is used to drive the radial sides and the middle of the main roller 110 to move up and down flexibly, so as to control the roller gap spacing and pressure adjustment in the first direction area, the second direction area or the third direction area of ​​the main roller, so as to meet the dynamic control under the thickness fluctuation of different areas of the pole piece 104; secondly, an alarm function is added when frequent adjustment occurs to remind equipment personnel to check, repair and adjust the equipment in time.

[0139] like Figure 4 and Figure 5 The composition of the second movable module 112 in the present embodiment shown is the same as the first movable module 108, and is composed of a motor and other linear motion mechanisms such as a screw driven by the motor. The radial sides of the main roller 110 are respectively installed on the linear motion mechanisms through a connecting frame 111, and the corresponding linear motion mechanisms can be driven to move up and down accordingly by controlling the motors individually or simultaneously, so that the second movable module 112 can finally drive the radial sides and the middle of the main roller 110 to perform independent longitudinal adjustments relative to the pole piece 104, so as to dynamically control the roller gap spacing in the first direction area, the second direction area or the third direction area of ​​the main roller; to meet the dynamic control under the thickness fluctuation of the pole piece 104; secondly, to increase the alarm function when frequent adjustment occurs, to remind the equipment personnel to check, repair and adjust the equipment in time.

[0140] Optionally, an alarm reset button is also provided on the rolling equipment. When the user completes the maintenance of the equipment and the pole piece 104, the alarm reset button is used to send an equipment reset signal to the rolling equipment controller, and the signal is forwarded to the communication unit, so that the evaluation unit clears the accumulated number of pole piece abnormalities and re-accumulates them. This can achieve the purpose of clearing the data cache, thereby improving the analysis and calculation speed.

[0141] In summary, the method of the present invention can form a closed-loop feedback mechanism between the host computer and the rolling equipment, so as to achieve the purpose of real-time adjustment of the current electrode thickness; compared with other control methods using historical data models, it can effectively reduce errors in actual control and reduce production costs.

[0142] Secondly, by dividing the adjustment areas and adjustment priorities according to the shape of the main roller itself, it can cover the thickness anomalies and thickness fluctuation factors caused by various situations such as changes in the pole piece transmission speed, changes in the rolling speed and rolling rebound, so that the abnormal thickness areas of the pole piece between before and after pressing can have independent adjustment strategies and ensure flexible switching between adjustment strategies, ultimately ensuring the stability of the rolling process and the uniformity of the overall thickness of the pole piece, avoiding more obvious thickness fluctuations in the overall pole piece.

[0143] In practical applications, the sampling frequency of the laser displacement sensor and the sensor movement speed can be adjusted according to the change in the pole piece transmission speed, thereby ensuring that the pole piece can be measured in all directions. Secondly, the number of sensors, the amount of pole piece thickness data collected and the number of areas can also be adjusted, so that the present invention can be flexibly applied to pole pieces of various sizes and models.

[0144] Finally, the present invention conducts targeted training on the main roller position and roller pressure adjustment strategy to control the electrode thickness and obtains the equipment electrode thickness adjustment model; at the same time, in order to avoid the overfitting phenomenon of the training model results, a feedback mechanism is added on the basis of the powerful computing power of the existing training model, and the powerful analytical ability of the training model is combined with the stability of the feedback mechanism. The roller gap spacing and pressure of the rolling equipment are continuously corrected, and the electrode thickness is controlled to be maintained within the set thickness range in real time, avoiding the problems of low prediction result accuracy and low product qualification rate caused by relying solely on the data model.

[0145] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code. The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of processes and / or boxes in the flowchart and / or block diagram, may be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that instructions executed by the processor of a computer or other programmable data processing device generate instructions for implementing the functions in the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0146] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide for implementing the process in the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The above describes the embodiments of the present invention in conjunction with the accompanying drawings, but the present invention is not limited to the above specific implementations, which are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A method for controlling the thickness of a pole piece, characterized in that: include: The host computer obtains the current electrode thickness data in real time; According to the comparison result between the target thickness threshold and the pole piece thickness data, the pole piece abnormality result is obtained and the number of pole piece abnormalities is accumulated; The equipment pole piece thickness adjustment model is used to analyze the pole piece abnormal results and obtain the equipment parameter adjustment instructions; Generate a device alarm message based on the comparison result between the abnormal number threshold and the accumulated number of pole piece abnormalities; The equipment parameter adjustment instructions and equipment alarm messages are respectively sent to the roller pressing equipment to execute main roller spacing adjustment, pressure adjustment and output alarm information.

2. The pole piece thickness control method according to claim 1, characterized in that: The host computer obtains the current electrode thickness data in real time, including: When the pole piece enters the rolling equipment, the upper computer controls the laser displacement sensor to move and scan along the width direction of the pole piece to obtain multiple laser signals in multiple primary areas; Perform distance calculation on multiple laser signals to obtain pole piece thickness data of multiple primary regions; Directionally grouping the pole piece thickness data of multiple primary regions based on the main roller position to obtain data groups of the first direction, second direction and third direction regions of the main roller; The data groups in each area are processed by averaging to obtain the mean values ​​of the pole piece thickness in the three directions of the main roller.

3. The pole piece thickness control method according to claim 2, characterized in that: According to the comparison result between the target thickness threshold and the pole piece thickness data, the pole piece abnormality result is obtained, including: The mean value of the electrode thickness in each direction area is compared with the corresponding target thickness threshold. If the electrode thickness value in each direction area is within the corresponding target thickness threshold range, the electrode is normal. If the mean value of the pole piece thickness in any direction area deviates from the corresponding target thickness threshold range, a pole piece abnormal result is obtained.

4. The pole piece thickness control method according to claim 1, characterized in that: The equipment pole piece thickness adjustment model is used to analyze the pole piece abnormal results and obtain equipment parameter adjustment instructions, including: Import the data group of the direction area associated with the abnormal result of the pole piece into the equipment pole piece thickness adjustment model to obtain the adjustment strategy that the main roller needs to execute; Generate equipment parameter adjustment instructions based on the adjustment strategy that the main roller needs to execute, and send them to the rolling equipment to adjust the spacing and pressure of the equipment's rolling area.

5. The pole piece thickness control method according to claim 3, characterized in that: Generate equipment parameter adjustment instructions based on the adjustment strategy required by the main roller and send them to the rolling equipment to adjust the spacing and pressure of the equipment rolling area, including: Identify the direction area associated with the pole piece abnormal result. When the area associated with the pole piece abnormal result is the first direction area, the second direction area or the third direction area of ​​the main roller, substitute the data group of the corresponding area into the first direction area adjustment strategy, the second direction area adjustment strategy or the third direction area adjustment strategy of the main roller for calculation, and obtain the main roller gap spacing of the adjusted first direction area, the second direction area or the third direction area of ​​the main roller; The corresponding equipment parameter adjustment instructions are generated according to the main roller gap spacing in the first direction area, the second direction area or the third direction area of ​​the main roller, and sent to the rolling equipment to control the rolling equipment to adjust the roller gap spacing and pressure in the first direction area, the second direction area or the third direction area of ​​the main roller.

6. The pole piece thickness control method according to claim 1, characterized in that: Also including receiving a device reset signal; The accumulated pole piece abnormality results are cleared according to the received device reset signal, and the number of pole piece abnormalities is accumulated again.

7. A pole piece thickness control system, characterized in that it includes: Thickness measurement unit, evaluation unit, command generation unit, communication unit and alarm unit; The thickness measuring unit is used to obtain the current pole piece thickness data in real time; The evaluation unit is used to obtain the pole piece abnormality result and accumulate the number of pole piece abnormalities according to the comparison result between the target thickness threshold and the pole piece thickness data; The instruction generation unit is used to analyze the abnormal results of the pole piece by using the equipment pole piece thickness adjustment model to obtain the equipment parameter adjustment instruction; The alarm unit is used to generate a device alarm message according to the comparison result between the abnormal number threshold and the accumulated electrode abnormal results; The communication unit is used to send equipment parameter adjustment instructions and equipment alarm messages to the rolling equipment to execute main roller spacing adjustment, pressure adjustment and output alarm information.

8. The pole piece thickness control system according to claim 7, characterized in that: The thickness measuring unit communicates with the thickness gauge; The thickness gauge includes a laser displacement sensor formed in an up-and-down manner, and the laser displacement sensor is installed on the first moving module; The first moving module is disposed corresponding to the upper and lower surfaces of the pole piece, and drives the laser displacement sensor to move along the width direction of the pole piece.

9. The pole piece thickness control system according to claim 7, characterized in that: The communication unit communicates with the roller pressing equipment controller; Wherein, the rolling equipment comprises: a second movable module, a main roller, a connecting frame and an alarm device; The two radial sides of the main roller are connected to the second movable module through two connecting frames, and the main roller is located above the pole piece; The second moving module is electrically connected to the roller pressing device controller, and is used to independently control the second moving module to respectively drive the two radial sides and the middle of the main roller to move longitudinally relative to the pole piece, so as to adjust the roller gap spacing and pressure of the pole piece relative to the first direction area, the second direction area and the third direction area of ​​the main roller; The alarm device is electrically connected to the roller pressing equipment controller and is used to output an alarm signal.

10. The pole piece thickness control system according to claim 7, characterized in that: The rolling device is also provided with an alarm reset button for clearing the accumulated number of pole piece abnormalities.

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