A control method and system for an electrode roller press

Abstract

The application relates to the technical field of device control, in particular to a control method and system of an electrode rolling device, the method comprising the following steps: obtaining initialization device control information of a target electrode rolling device and sensor information of the target electrode rolling device in a preset time slice; processing the sensor information of the target electrode rolling device to obtain control change information of the target electrode rolling device; and adjusting the initialization device control information based on the control change information to obtain target device information of the target electrode rolling device.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment control, and in particular to a control method and system for electrode rolling equipment. Background Art

[0002] With the development of technology and the increasing demand for mobile devices, the demand for secondary batteries is also growing rapidly. In particular, secondary batteries are widely used as energy sources for various electronic products and various mobile devices due to their high energy density, high operating voltage, and excellent storage and life characteristics.

[0003] With the expansion of secondary battery applications, the demand for high-capacity secondary batteries is rapidly increasing. As a method to increase the capacity of secondary batteries, technologies are being studied to increase the loading of the electrode mixture layer. However, increasing the loading of the electrode mixture layer results in an increase in the volume of the electrode. To reduce the volume of the electrode, a process of rolling the electrode at a higher pressure is required.

[0004] In the existing technology, a multi-stage induction heating electrode rolling method is used to prepare electrode plates. However, defects such as rebound, excessive pores, and uneven thickness may occur during the preparation process. The existing technology is unable to accurately adjust the set parameters of the electrode rolling method for preparing electrode plates. Summary of the Invention

[0005] The present invention provides a control method for an electrode rolling device, the method comprising the following steps:

[0006] S100, obtaining the initialization device control information A of the target electrode rolling device 0 ={A 0 1, A 0 2, A 0 3, A 0 4}, A 0 1 is the initialization specified induction heating temperature, A 0 2 is the initial roller speed, A 0 3 is the initial roller pressure, A 0 4 is the initialization roller gap.

[0007] S200, obtain the preset time slice △T 0The sensor information B of the internal target electrode rolling equipment is {B1, B2, B3, B4}, where B1 is the thickness data of the electrode plate to be rolled collected by the thickness sensor in the target electrode rolling equipment, B2 is the compaction density of the electrode plate to be rolled collected by the density sensor in the target electrode rolling equipment, B3 is the porosity calculated based on the pore spacing of the electrode plate to be rolled collected by the distance sensor in the target electrode rolling equipment, and B4 is the rebound rate calculated based on the rebound distance of the electrode plate to be rolled collected by the defect sensor in the target electrode rolling equipment.

[0008] S300, process B to obtain control change information △A=(△A1, △A2, △A3, △A4) of the target electrode rolling equipment, where △A1 is the change in temperature of induction heating, △A2 is the change in rolling speed, △A3 is the change in rolling pressure, and △A4 is the change in roller gap distance.

[0009] S400, control A based on △A 0 Adjust and obtain the target device information A=(A1,A2,A3,

[0010] A4) to control the equipment parameters of the target electrode rolling equipment, wherein A1 is the target induction heating temperature, A2 is the target rolling speed, A3 is the target rolling pressure, and A4 is the target roll gap.

[0011] The present invention also protects a control system for an electrode rolling device, the system comprising:

[0012] The first execution module is used to obtain the initialization device control information A of the target electrode rolling device 0 ={A 0 1, A 0 2, A 0 3, A 0 4}, A 0 1 is the initialization specified induction heating temperature, A 0 2 is the initial roller speed, A 0 3 is the initial roller pressure, A 0 4 is the initialization roller gap.

[0013] The second execution module is used to obtain the preset time slice △T 0The sensor information B of the internal target electrode rolling equipment is {B1, B2, B3, B4}, where B1 is the thickness data of the electrode plate to be rolled collected by the thickness sensor in the target electrode rolling equipment, B2 is the compaction density of the electrode plate to be rolled collected by the density sensor in the target electrode rolling equipment, B3 is the porosity calculated based on the pore spacing of the electrode plate to be rolled collected by the distance sensor in the target electrode rolling equipment, and B4 is the rebound rate calculated based on the rebound distance of the electrode plate to be rolled collected by the defect sensor in the target electrode rolling equipment.

[0014] The third execution module is used to process B to obtain the control change information △A=(△A1, △A2, △A3, △A4) of the target electrode rolling equipment, where △A1 is the change in temperature of induction heating, △A2 is the change in rolling speed, △A3 is the change in rolling pressure, and △A4 is the change in roller gap distance.

[0015] The fourth execution module is used to control A based on △A 0 Adjust and obtain the target device information of the target electrode rolling device

[0016] Information A=(A1, A2, A3, A4) is used to control the equipment parameters of the target electrode rolling equipment, where A1 is the target induction heating temperature, A2 is the target rolling speed, A3 is the target rolling pressure, and A4 is the target roll gap.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] The present invention provides a control method for an electrode rolling device, the method comprising the steps of: obtaining a target electrode rolling device;

[0019] Initialization device control information A 0 ={A 0 1, A 0 2, A 0 3, A 0 4}, A 0 1 is the initialization specified induction heating temperature, A 0 2 is the initial roller speed, A 0 3 is the initial roller pressure, A 0 4 is the initialization of the roller gap; get the preset time slice △T 0The sensor information B of the internal target electrode rolling device is {B1, B2, B3, B4}, where B1 is the thickness data of the electrode plate to be rolled collected by the thickness sensor in the target electrode rolling device, B2 is the compaction density of the electrode plate to be rolled collected by the density sensor in the target electrode rolling device, B3 is the porosity calculated by the pore spacing of the electrode plate to be rolled collected by the distance sensor in the target electrode rolling device, and B4 is the rebound rate calculated by the rebound distance of the electrode plate to be rolled collected by the defect sensor in the target electrode rolling device; B is processed to obtain the control change information △A= (△A1, △A2, △A3, △A4) of the target electrode rolling device, where △A1 is the change temperature of the induction heating, △A2 is the change speed of rolling, △A3 is the change pressure of rolling, and △A4 is the change distance of the roller gap; based on △A, A is controlled 0 Adjust and obtain the target device information A=(A1,A2,A3,

[0020] A4) is used to control the equipment parameters of the target electrode rolling equipment, wherein A1 is the target induction heating temperature, A2 is the target rolling speed, A3 is the target rolling pressure, and A4 is the target roll gap; based on the thickness data, compaction density, porosity and rebound rate, the change in heating temperature, the change in rolling speed, the change in rolling pressure and the change in roll gap are calculated, and the equipment parameters such as the heating temperature, rolling speed, rolling pressure and roll gap that are initialized are controlled and adjusted by the change in heating temperature, the change in rolling speed, the change in rolling pressure and the change in roll gap, so as to prepare an electrode plate with good performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 This is a flow chart of a control method for an electrode rolling device provided in Example 1 of the present invention;

[0023] Figure 2 This is a structural diagram of a control system for an electrode rolling device provided in Example 2 of the present invention. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0025] Example 1

[0026] like Figure 1 As shown, this embodiment 1 provides a control method for an electrode rolling device, the method comprising the following steps:

[0027] S100, obtaining the initialization device control information A of the target electrode rolling device 0 ={A 0 1, A 0 2, A 0 3, A 0 4}, A 0 1 is the initialization specified induction heating temperature, A 0 2 is the initial roller speed, A 0 3 is the initial roller pressure, A 0 4 is the initialization roller gap.

[0028] Specifically, the roller gap is the spacing distance between the two rollers.

[0029] Specifically, the step S100 also includes the following steps to obtain A 0 :

[0030] S101, obtain the required information D={D1, D2, D3, D4} of the electrode plate to be rolled, which is input by the user, where D1 is the required thickness of the electrode plate to be rolled, D2 is the required compaction density of the electrode plate to be rolled, D3 is the required porosity of the electrode plate to be rolled, and D4 is the required rebound rate of the electrode plate to be rolled.

[0031] S102, according to D, obtain A 0 .

[0032] Preferably, in step S102, A 0 1Meet the following conditions:

[0033] , T base is any temperature in the pre-set basic temperature range, T max is the maximum temperature to avoid decomposition of the base plate material of the electrode plate to be rolled, T minis the lowest temperature at which the adhesive in the electrode plate to be rolled melts, min() is the minimum function, and max() is the maximum function; those skilled in the art know the basic temperature range, decomposition temperature, and lowest temperature at which the adhesive melts for different electrode plate materials, which will not be described in detail here; for example, T base is 145 degrees, T max is 180 degrees, T min is 80 degrees, △T is the temperature change.

[0034] Furthermore, △T meets the following conditions:

[0035] , where Q is in T base The compaction density under the condition of , k4 is the porosity temperature influence factor, k2 is the temperature sensitivity coefficient, δ is the electrode plate material at the reference temperature T 0 The inherent rebound rate under T 0 is the room temperature of 25°C, λ is the temperature suppression coefficient, and those skilled in the art know that different electrode plate materials have different T base The temperature influence factors of density and porosity under these conditions will not be elaborated here.

[0036] Preferably, in step S102, A 0 3. Meet the following conditions:

[0037] , k1 is the pressure sensitivity coefficient, k2 is the temperature sensitivity coefficient, C is the material intrinsic density constant, wherein the pressure sensitivity coefficient is set according to the material properties of the electrode plate to be rolled, the temperature sensitivity coefficient is set according to the material properties of the electrode plate to be rolled, and the material intrinsic density constant is set according to the material properties of the electrode plate to be rolled. Those skilled in the art know the pressure sensitivity coefficient, temperature sensitivity coefficient and material intrinsic density constant of different electrode plate materials, which will not be repeated here. For example, when the base plate material of the electrode plate to be rolled is a nickel-cobalt-manganese ternary material, k1=0.15g / cm 3 / MPa, when the adhesive material of the rolled electrode plate is PVDF adhesive, k2≈0.002g / cm 3 / ℃.

[0038] Preferably, in step S102, A 0 2Meet the following conditions:

[0039] , where rand() is a random function and max() is a maximum function. U1 meets the following conditions:

[0040] , λ is the temperature suppression coefficient, μ is the roller speed compensation coefficient, δ is the electrode plate material at the reference temperature T 0The inherent rebound rate under T 0 The room temperature is 25°C; those skilled in the art know the temperature suppression coefficient of different electrode plate materials, the rolling speed compensation coefficient, the reference temperature T 0 The inherent rebound rate under this condition will not be described here;

[0041] Among them, U2 meets the following conditions:

[0042] , where α is the zero-pressure porosity, γ is the rolling speed sensitivity coefficient, and β is the pressure compression index; those skilled in the art are aware of the zero-pressure porosity, rolling speed sensitivity coefficient, and pressure compression index of different electrode plate materials, which will not be described here.

[0043] Preferably, in step S102, A 0 4Meet the following conditions:

[0044] , where η is the thermal expansion factor, ε is the empirical rebound margin, k3 is the equipment stiffness coefficient, T 0 The room temperature is 25° C. Those skilled in the art are aware of the thermal expansion factors, empirical rebound margins and equipment stiffness coefficients of different electrode plate materials, which will not be described in detail here.

[0045] S200, obtain the preset time slice △T 0 The sensor information B of the internal target electrode rolling equipment is {B1, B2, B3, B4}, where B1 is the thickness data of the electrode plate to be rolled collected by the thickness sensor in the target electrode rolling equipment, B2 is the compaction density of the electrode plate to be rolled collected by the density sensor in the target electrode rolling equipment, B3 is the porosity calculated by the pore spacing of the electrode plate to be rolled collected by the distance sensor in the target electrode rolling equipment, and B4 is the rebound rate calculated by the rebound distance of the electrode plate to be rolled collected by the defect sensor in the target electrode rolling equipment; wherein, the preset time slice set by those skilled in the art according to actual needs will not be repeated here; wherein, those skilled in the art know the method of calculating the porosity by the pore spacing, which will not be repeated here; wherein, those skilled in the art know the method of calculating the rebound rate by the rebound distance, which will not be repeated here.

[0046] Specifically, in step S200, ΔT 0 Meet the following conditions:

[0047] △T 0 =gcd(gcd(gcd(t1, t2), t3), t4), gcd() is the greatest common divisor function, t1 is the time interval for the thickness sensor to collect data, t2 is the time interval for the density sensor to collect data, t3 is the time interval for the distance sensor to collect data, and t4 is the time interval for the defect sensor to collect data.

[0048] S300, process B to obtain control change information △A=(△A1, △A2, △A3, △A4) of the target electrode rolling equipment, where △A1 is the change in temperature of induction heating, △A2 is the change in rolling speed, △A3 is the change in rolling pressure, and △A4 is the change in roller gap distance.

[0049] Specifically, step S300 also includes the following:

[0050] S301, according to B, obtain the preset time slice ΔT of the target electrode rolling equipment 0 Device control information AB within 0 ={AB 0 1, AB 0 2.AB 0 3.AB 0 4}, where AB 0 1 is the specified induction heating temperature determined based on B, AB 0 2 is the roller speed determined based on B, AB 0 3 is the roller pressure determined based on B, AB 0 4 is the roll gap determined based on B, further understanding: AB 0 The method of obtaining 1 is the same as A 0 1 is obtained in the same way, AB 0 The method of obtaining 2 is the same as A 0 2 is obtained in the same way, AB 0 The method of obtaining 3 is the same as A 0 3 is obtained in the same way, AB 0 The method of obtaining 4 is the same as A 0 4 is obtained in the same way.

[0051] S302, according to AB 0 and A 0 , get △A, where △A1=AB 0 1-A 0 1. △A2=AB 0 2-A 0 2. △A3=AB 0 3-A 0 3. △A4=AB 0 4-A 0 4. S400, control A based on △A 0 Adjust and obtain the target device information A=(A1,A2,A3,

[0052] A4) to control the equipment parameters of the target electrode rolling equipment, wherein A1 is the target induction heating temperature, A2 is the target rolling speed, A3 is the target rolling pressure, and A4 is the target roll gap.

[0053] Specifically, step S400 also includes the following steps:

[0054] S401, obtaining the control change information K={K1, ..., K x ,……,K p}, K x ={K x1 , K x2 , K x3 , K x4}, K x1 is the temperature change of the induction heating at the xth time slice within T, K x2 is the changing speed of the roller pressure in the xth time slice within T, K x3 is the change in roller pressure at the xth time slice within T, K x4 is the roller gap change distance of the xth time slice in T; the value range of x is 1 to p, and p is the number of time slices in T; further understanding is: each time slice in T is △T 0 The changing temperature of induction heating, the changing speed of roller pressure, the changing pressure of roller pressure and the changing distance of roller gap in each time slice are consistent with the acquisition methods of △A1, △A2, △A3 and △A4 in △A respectively.

[0055] S402: Based on K, obtain A, where A1 meets the following conditions: Among them, A2 meets the following conditions: Among them, A3 meets the following conditions: Among them, A4 meets the following conditions: .

[0056] The above embodiment provides a control method for an electrode rolling device, the method comprising the steps of: obtaining a target electrode rolling pressure;

[0057] Equipment roller speed, A 0 3 is the initial roller pressure, A 0 4 is the initialization of the roller gap; get the preset time slice △T 0The sensor information B of the internal target electrode rolling device is {B1, B2, B3, B4}, where B1 is the thickness data of the electrode plate to be rolled collected by the thickness sensor in the target electrode rolling device, B2 is the compaction density of the electrode plate to be rolled collected by the density sensor in the target electrode rolling device, B3 is the porosity calculated by the pore spacing of the electrode plate to be rolled collected by the distance sensor in the target electrode rolling device, and B4 is the rebound rate calculated by the rebound distance of the electrode plate to be rolled collected by the defect sensor in the target electrode rolling device; B is processed to obtain the control change information △A= (△A1, △A2, △A3, △A4) of the target electrode rolling device, where △A1 is the change temperature of the induction heating, △A2 is the change speed of rolling, △A3 is the change pressure of rolling, and △A4 is the change distance of the roller gap; based on △A, A is controlled 0 Adjustments are made to obtain the target equipment information A=(A1, A2, A3, A4) of the target electrode rolling equipment, so as to control the equipment parameters of the target electrode rolling equipment, wherein A1 is the target induction heating temperature, A2 is the target rolling speed, A3 is the target rolling pressure, and A4 is the target roll gap; as mentioned above, based on the thickness data, compaction density, porosity and rebound rate, the change in heating temperature, the change in rolling speed, the change in rolling pressure and the change in roll gap are calculated, and the equipment parameters such as the heating temperature, rolling speed, rolling pressure and roll gap that are initialized are controlled and adjusted by the change in heating temperature, the change in rolling speed, the change in rolling pressure and the change in roll gap, so as to prepare an electrode plate with good performance.

[0058] Example 2

[0059] like Figure 2 As shown, this second embodiment further provides a control system for an electrode rolling device, the system comprising:

[0060] The first execution module obtains the initialization device control information A of the target electrode rolling device 0 ={A 0 1, A 0 2, A 0 3, A 0 4}, A 0 1 is the initialization specified induction heating temperature, A 0 2 is the initial roller speed, A 0 3 is the initial roller pressure, A 0 4 is the initialization roller gap.

[0061] The second execution module is used to obtain the preset time slice △T 0The sensor information B of the internal target electrode rolling equipment is {B1, B2, B3, B4}, where B1 is the thickness data of the electrode plate to be rolled collected by the thickness sensor in the target electrode rolling equipment, B2 is the compaction density of the electrode plate to be rolled collected by the density sensor in the target electrode rolling equipment, B3 is the porosity calculated based on the pore spacing of the electrode plate to be rolled collected by the distance sensor in the target electrode rolling equipment, and B4 is the rebound rate calculated based on the rebound distance of the electrode plate to be rolled collected by the defect sensor in the target electrode rolling equipment.

[0062] The third execution module is used to process B to obtain the control change information △A=(△A1, △A2, △A3, △A4) of the target electrode rolling equipment, where △A1 is the change in temperature of induction heating, △A2 is the change in rolling speed, △A3 is the change in rolling pressure, and △A4 is the change in roller gap distance.

[0063] The fourth execution module is used to control A based on △A 0 Adjust and obtain the target device information of the target electrode rolling device

[0064] Information A=(A1, A2, A3, A4) is used to control the equipment parameters of the target electrode rolling equipment, where A1 is the target induction heating temperature, A2 is the target rolling speed, A3 is the target rolling pressure, and A4 is the target roll gap.

[0065] Although some specific embodiments of the present invention have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should also be understood by those skilled in the art that various modifications may be made to the embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A control method for an electrode rolling device, characterized in that: The method comprises the following steps: S100, obtaining the initialization device control information A of the target electrode rolling device 0 ={A 0 1, A 0 2, A 0 3, A 0 4}, A 0 1 is the initialization specified induction heating temperature, A 0 2 is the initial roller speed, A 0 3 is the initial roller pressure, A 0 4 is the initialized roller gap, and the step S100 also includes the following steps to obtain A 0 : S101, obtaining the required information D = {D1, D2, D3, D4} of the electrode plate to be rolled, input by the user, where D1 is the required thickness of the electrode plate to be rolled, D2 is the required compaction density of the electrode plate to be rolled, D3 is the required porosity of the electrode plate to be rolled, and D4 is the required rebound rate of the electrode plate to be rolled; S102, according to D, obtain A 0 In step S102, A 0 1Meet the following conditions: , T base is any temperature in the pre-set basic temperature range, T max is the maximum temperature to avoid decomposition of the base plate material of the electrode plate to be rolled, T min is the lowest temperature at which the adhesive in the electrode plate to be rolled melts, min() is the minimum function, max() is the maximum function, △T is the temperature change, and △T meets the following conditions: , where Q is in T base The compaction density under the condition of , k4 is the porosity temperature influence factor, k2 is the temperature sensitivity coefficient, δ is the electrode plate material at the reference temperature T 0 The inherent rebound rate under T 0 is the room temperature of 25°C, λ is the temperature suppression coefficient; Among them, in step S102, A 0 3. Meet the following conditions: , k1 is the pressure sensitivity coefficient, k2 is the temperature sensitivity coefficient, and C is the material intrinsic density constant; Among them, in step S102, A 0 2. Meet the following conditions: , where rand() is a random function, max() is a maximum value function, U1 is the first roller speed, and U2 is the second roller speed; Among them, U1 meets the following conditions: , λ is the temperature suppression coefficient, μ is the roller speed compensation coefficient, δ is the electrode plate material at the reference temperature T 0 The inherent rebound rate under T 0 The room temperature is 25℃; Among them, U2 meets the following conditions: , where α is the zero-pressure porosity, γ is the roller speed sensitivity coefficient, and β is the pressure compressibility index; Among them, in step S102, A 0 4Meet the following conditions: , where η is the thermal expansion factor, ε is the empirical rebound margin, k3 is the equipment stiffness coefficient, T 0 The room temperature is 25℃; S200, obtain the preset time slice △T 0 Sensor information B of the internal target electrode rolling device = {B1, B2, B3, B4}, where B1 is the thickness data of the electrode plate to be rolled collected by the thickness sensor in the target electrode rolling device, B2 is the compaction density of the electrode plate to be rolled collected by the density sensor in the target electrode rolling device, B3 is the porosity calculated based on the pore spacing of the electrode plate to be rolled collected by the distance sensor in the target electrode rolling device, and B4 is the rebound rate calculated based on the rebound distance of the electrode plate to be rolled collected by the defect sensor in the target electrode rolling device; S300, processing B to obtain control change information △A = (△A1, △A2, △A3, △A4) of the target electrode rolling equipment, where △A1 is the change in temperature of induction heating, △A2 is the change in rolling speed, △A3 is the change in rolling pressure, and △A4 is the change in roller gap distance; S400, control A based on △A 0 Adjust and obtain the target device information A=(A1,A2, A3, A4) to achieve control of the equipment parameters of the target electrode rolling equipment, where A1 is the target induction heating temperature, A2 is the target rolling speed, A3 is the target rolling pressure, and A4 is the target roll gap.

2. A control system for an electrode rolling device, using the control method for an electrode rolling device according to claim 1, characterized in that: The system comprises: The first execution module is used to obtain the initialization device control information A of the target electrode rolling device 0 ={A 0 1, A 0 2, A 0 3, A 0 4}, A 0 1 is the initialization specified induction heating temperature, A 0 2 is the initial roller speed, A 0 3 is the initial roller pressure, A 0 4 is the initialization roller gap; The second execution module is used to obtain the preset time slice △T 0 Sensor information B of the internal target electrode rolling device = {B1, B2, B3, B4}, where B1 is the thickness data of the electrode plate to be rolled collected by the thickness sensor in the target electrode rolling device, B2 is the compaction density of the electrode plate to be rolled collected by the density sensor in the target electrode rolling device, B3 is the porosity calculated based on the pore spacing of the electrode plate to be rolled collected by the distance sensor in the target electrode rolling device, and B4 is the rebound rate calculated based on the rebound distance of the electrode plate to be rolled collected by the defect sensor in the target electrode rolling device; The third execution module is used to process B to obtain control change information △A=(△A1, △A2, △A3, △A4) of the target electrode rolling equipment, where △A1 is the change in temperature of induction heating, △A2 is the change in rolling speed, △A3 is the change in rolling pressure, and △A4 is the change in roller gap distance; The fourth execution module is used to control A based on △A 0 Adjust to get the target electrode rolling equipment Information A=(A1, A2, A3, A4) is used to control the equipment parameters of the target electrode rolling equipment, where A1 is the target induction heating temperature, A2 is the target rolling speed, A3 is the target rolling pressure, and A4 is the target roll gap.

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