Cam curve fitting method, lamination equipment and control method thereof

Abstract

The invention relates to the technical field of lithium battery manufacturing equipment, and particularly discloses a cam curve fitting method, lamination equipment and a control method thereof.The lamination equipment comprises a diaphragm tension compensation mechanism, and the method comprises the steps that the movement stage of the lamination process is divided into a diaphragm collecting stage and a diaphragm releasing stage; a plurality of continuous cam parameters related to the compensation action of the diaphragm tension compensation mechanism in the diaphragm winding stage and the diaphragm unwinding stage are obtained respectively; a first curve data set related to the film collecting stage and a second curve data set related to the film releasing stage are formed according to the cam parameters; according to the first curve data set and the second curve data set, a cam curve is formed through multiple times of polynomial fitting. The cam curve is obtained based on the cam parameters of the diaphragm tension compensation mechanism in different motion stages, so that the lamination equipment applying the cam curve can improve the stability and reliability of diaphragm unwinding and winding in the lamination process. And the use cost of the equipment can be reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of lithium battery manufacturing equipment, and specifically relates to a multi-battery air tightness detection mechanism and equipment. Background Art

[0002] The laminated battery industry has developed rapidly in recent years. In the production of laminated batteries, it is necessary to collect cam curves and use the collected cam curves for control and debugging, so as to reduce the fluctuation of the swing roller and improve the stability of the lamination process.

[0003] The existing cam curve collection method for some core workstations relies on the on-site measurement of the workstation model parameters by debugging personnel. This is subject to equipment processing errors, assembly errors, and measurement errors, resulting in certain errors between the calculated cam curve and the actual curve. When applied to different stacking equipment, a lot of parameter debugging is required before normal use, which requires a lot of manual debugging time and increases the cost of equipment use. Summary of the Invention

[0004] In order to address the deficiencies of the prior art, the present application provides a cam curve fitting method, a lamination device and a control method thereof.

[0005] In a first aspect, a cam curve fitting method is applied to a lamination device, wherein the lamination device includes a diaphragm tension compensation mechanism, and the method includes:

[0006] The motion phase of the lamination process is divided into the film collection phase and the film release phase;

[0007] respectively acquiring a plurality of continuous cam parameters related to the compensation action of the diaphragm tension compensation mechanism in the film collecting stage and the film unwinding stage;

[0008] forming a first curve data set related to the film collecting stage and a second curve data set related to the film unwinding stage according to the cam parameters;

[0009] A cam curve is formed by multi-time polynomial fitting according to the first curve data set and the second curve data set.

[0010] In one embodiment, forming a cam curve by multiple polynomial fitting based on the first curve data set and the second curve data set includes:

[0011] Using the connection point between the first curve data set and the second curve data set as a joint point;

[0012] A multi-stage polynomial fitting is performed based on the cam parameters of the joint points.

[0013] In one embodiment, the multi-order polynomial is a cubic polynomial, and the formula of the cubic polynomial is:

[0014]

[0015] Wherein, θ1 is the displacement parameter in the first curve data set, θ2 is the displacement parameter in the second curve data set, t is the time parameter corresponding to the displacement parameter, a1, a2, a3, a4 are the coefficients of the cubic polynomial in the first curve data set, a 11 、a 12 、a 13 、a 14 are the coefficients of the cubic polynomial for the second curve data set.

[0016] In one embodiment, forming the cam curve by multiple polynomial fitting further includes:

[0017] Determine the velocity value and acceleration value corresponding to the joint point according to preset conditions;

[0018] The coefficients of the cubic polynomial are obtained based on the velocity value and the acceleration value corresponding to the joint point.

[0019] In one embodiment, the preset conditions include:

[0020] The velocity values ​​and acceleration values ​​at the joint points in the first curve data set are respectively consistent with the velocity values ​​and acceleration values ​​at the corresponding joint points in the second curve data set.

[0021] In one embodiment, the diaphragm tension compensation mechanism includes a tension adjustment mechanism and / or an unwinding mechanism.

[0022] In one embodiment, the cam parameters include time parameters and displacement parameters of the tension adjustment mechanism and the unwinding mechanism.

[0023] In one embodiment, the first curve data set and the second curve data set include at least a plurality of time parameters and a plurality of displacement parameters of the diaphragm tension compensation mechanism;

[0024] The forming of a first curve data set related to the film collecting stage and a second curve data set related to the film releasing stage according to the cam parameters includes:

[0025] The time parameter at the same moment is associated with the corresponding displacement parameter and mapped.

[0026] In a second aspect, the present application further discloses a control method for a lamination device, wherein the lamination device includes a diaphragm buffer mechanism, and the control method is applied to the diaphragm buffer mechanism, and the method includes:

[0027] Get the preset cam curve;

[0028] Compensation control is performed on the film collecting stage or the film releasing stage of the diaphragm buffer mechanism according to the cam curve;

[0029] The cam curve is obtained by fitting using any one of the cam curve fitting methods described above.

[0030] In a third aspect, the present application further discloses a lamination device, comprising:

[0031] processor;

[0032] a memory, the memory being electrically connected to the processor; and

[0033] A diaphragm cache mechanism, electrically connected to the processor and used for caching the diaphragm;

[0034] A computer program is stored in the memory, and the processor controls the diaphragm buffer mechanism to execute the control method of the lamination device as described above by calling the computer program stored in the memory.

[0035] As described above, the present application divides the motion phases of the lamination process into a film-reeling phase and a film-unwinding phase, and obtains multiple cam parameters related to the compensation action of the diaphragm tension compensation mechanism in each phase, thereby forming a first curve data set and a second curve data set related to the cam parameters, respectively. The first curve data set and the second curve data set are then used to form the desired cam curve through multiple polynomial fitting. The present application smoothes the cam parameters of the diaphragm tension compensation mechanism in different motion phases to obtain a continuous, smooth cam curve, so that the lamination equipment using this cam curve can reduce the tension fluctuation of the diaphragm and improve the stability and reliability of the diaphragm unwinding and winding during the lamination process. In addition, the cam curve is compatible with different lamination equipment, reducing the manual debugging time of the lamination equipment and reducing the cost of equipment use. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a flowchart of the implementation of the cam curve fitting method in the embodiment of the present application.

[0037] Figure 2 This is an application scenario diagram of the cam curve fitting method in an embodiment of the present application.

[0038] Figure 3 This is a diagram of the experimental results of the cache axis position waveform in the embodiment of the present application.

[0039] Figure 4 1 is a graph showing the experimental results of the cache axis velocity waveform in an embodiment of the present application.

[0040] Figure 5 This is another implementation flow chart of the cam curve fitting method in the embodiment of the present application.

[0041] Figure 6 It is a flow chart for implementing the lamination equipment control method in an embodiment of the present application.

[0042] Figure 7 It is a functional module diagram of the lamination equipment in an embodiment of the present application. DETAILED DESCRIPTION

[0043] To make the purpose, technical solutions and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. The described embodiments are only part of the embodiments of this application, not all of the embodiments.

[0044] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0045] Example 1

[0046] See also Figure 1 , the figure shows the application scenario of the cam curve fitting method provided in an embodiment of the present application.

[0047] In the application scenario of the present application, the cam curve fitting method is applied to a lamination device, which includes a diaphragm tension compensation mechanism 30 and may also include a lamination table 10, a transverse roller 20, a diaphragm buffer mechanism 40 and an unwinding mechanism 50.

[0048] The unwinding mechanism 50 is used to unwind the diaphragm following the lamination process.

[0049] The diaphragm tension compensation mechanism 30 is used to compensate for diaphragm tension and may include tension-compensating mechanisms such as a tension swing roller 31 and an unwinding motor. The diaphragm tension compensation mechanism 30 maintains the diaphragm tension within a reasonable fluctuation range, ensuring diaphragm stability during the lamination process, thereby improving the lamination quality of the lamination equipment. The diaphragm tension compensation mechanism 30 can be positioned between the unwinding mechanism 50 and the diaphragm buffer mechanism 40 to adjust the diaphragm tension of the tape-feeding diaphragm between the unwinding mechanism 50 and the diaphragm buffer mechanism, while also regulating the tape tension throughout the lamination process. The diaphragm tension compensation mechanism may be comprised of multiple tension swing rollers 31, or a tension swing roller 31 and a roller. The specific number and arrangement of the tension swing rollers 31 are not limited.

[0050] The diaphragm buffer mechanism 40 includes a buffer roller 41 , which can reel the diaphragm by moving to adjust the tension of the diaphragm and achieve buffering of the diaphragm.

[0051] The transverse roller 20 moves back and forth in the horizontal direction, driving the diaphragm to stack the pole pieces on the stacking table 10 in a "Z" shape, thereby achieving the stacking function.

[0052] It is understood that, in addition to being positioned between the membrane buffer mechanism 40 and the unwinding mechanism 50, the membrane tension compensation mechanism 30 may also be positioned between the membrane buffer mechanism 40 and the transverse roller 20, or may be positioned at other locations within the lamination equipment. Furthermore, the structural configurations of each of the aforementioned mechanisms may be implemented using conventional methods in the art. This application does not limit the specific locations and configurations of the membrane tension compensation mechanism 30 and its various mechanisms.

[0053] See also Figure 2 , the figure shows the implementation process of the cam curve fitting method in the embodiment of the present application.

[0054] like Figure 2 As shown, the cam curve fitting method may include the following steps:

[0055] 101. The movement phase of the lamination process is divided into the film collection phase and the film release phase.

[0056] During the operation of the laminating equipment, the unwinding mechanism continuously unwinds the diaphragm. As the transverse roller moves from one side of the starting point to the other side, the total length of the diaphragm decreases from maximum to minimum, that is, when the transverse roller moves to the upper part of the laminating table, the diaphragm buffer mechanism needs to rewind the diaphragm. This stage can be defined as the film rewinding stage. As the transverse roller further moves, the total length of the diaphragm decreases from minimum to maximum, that is, when the transverse roller moves to the other side relative to the starting point, the diaphragm buffer mechanism or unwinding mechanism needs to increase the degree of film unwinding. This stage can be defined as the film unwinding stage.

[0057] By distinguishing the motion stages of the lamination process, more targeted basic data can be provided, thereby ensuring that the fitted cam curve can achieve better control effects in different motion stages.

[0058] 102. Acquire a plurality of continuous cam parameters related to the compensation action of the diaphragm tension compensation mechanism in the film collection stage and the film unloading stage respectively.

[0059] In order to ensure that the tension of the diaphragm is in a state with less fluctuation, the diaphragm tension compensation mechanism will compensate for the diaphragm tension by adjusting the position of the tension swing roller or by adjusting the unwinding action of the unwinding mechanism.

[0060] For example, the position and installation errors of each roller can affect the diaphragm tension at different stages of the process. If the diaphragm tension is too low, it can easily wrinkle or deflect, leading to abnormal diaphragm condition during lamination. In this case, the position of the tension oscillating roller can be adjusted to adjust the diaphragm tension, thereby maintaining the diaphragm tension within an optimal range. The tension oscillating roller's drive mechanism can record the travel distance at this time, generating a displacement parameter that can be used as a cam parameter.

[0061] In one embodiment, the cam parameters may include displacement parameters, which can be used to determine the desired diaphragm tension. By forming a corresponding cam curve with the displacement parameters, a corresponding compensation action can be preset for the lamination device to improve the diaphragm tension compensation effect.

[0062] Furthermore, the cam parameters may also include a time parameter, which can be associated with a current displacement parameter so that corresponding displacement parameters can be derived through different time parameters, thereby forming a cam curve.

[0063] It is understood that cam parameters may include other parameters in addition to time and displacement parameters, such as acceleration values ​​obtained by sensors, thereby utilizing these cam parameters to reflect the tension compensation action for the diaphragm. Furthermore, these time and displacement parameters can be automatically acquired, for example, using a device such as a timer or encoder, thereby avoiding errors that may occur during manual data acquisition and improving the accuracy of the generated cam curve.

[0064] 103. Generate a first curve data set related to the film collection stage and a second curve data set related to the film release stage according to the cam parameters.

[0065] The first and second curve datasets may be composed of time parameters and displacement parameters of the diaphragm tension compensation mechanism at multiple moments. During the film retraction phase, the curve formed by the cam parameters is the first curve, and the dataset formed by the cam parameters is the first curve dataset. During the film unwinding phase, the curve formed by the cam parameters is the second curve, and the dataset formed by the cam parameters is the second curve dataset.

[0066] 104. Form a cam curve through multiple polynomial fitting according to the first curve data set and the second curve data set.

[0067] According to the first curve data set and the second curve data set, multiple polynomial fitting is performed to synthesize the first curve data set and the second curve data set into a larger number of smoother cam curves with higher precision, that is, synthesize them into a unified cam curve. Therefore, when applying the cam curve, it is possible to avoid the situation where the number of manual debugging times needs to be increased due to the small number of cam parameters.

[0068] In one embodiment, the connection point between the first and second curves, that is, the point where the first and second curve data sets meet, can be used as a joint point. This joint point can be the connection point between the film winding and film unwinding stages, that is, the cam point corresponding to when the transverse roller is positioned on one side. A multi-stage polynomial fit is then performed based on the cam parameters at this joint point.

[0069] Among them, the multi-order polynomial can be a cubic polynomial, a quartic polynomial or a quintic polynomial, and can be selected according to actual needs to achieve a smoother fitting effect on the first curve data set and the second curve data set. This application does not limit its implementation method.

[0070] In one embodiment, the multi-order polynomial is a cubic polynomial, and the formula of the cubic polynomial may be:

[0071]

[0072] Among them, θ1 is the displacement parameter in the first curve data set, θ2 is the displacement parameter in the second curve data set, t is the time parameter corresponding to the displacement parameter, a1, a2, a3, a4 are the coefficients of the cubic polynomial in the first curve data set, a 11 、a 12 、a 13 、a 14 are the coefficients of the cubic polynomial for the second curve data set.

[0073] Specifically, a cubic polynomial with an intermediate point path can be planned, and the connection point between the film collection stage and the film release stage is taken as the joint point. The speed of the joint point is the known expected speed. The cam parameters of the intermediate moment of the smooth connection of each joint are calculated, and a cubic polynomial that conforms to any starting and ending positions or starting and ending speeds can be obtained.

[0074] Among them, forming the cam curve through multiple polynomial fitting also includes determining the speed value and acceleration value corresponding to the joint point according to preset conditions, and obtaining the coefficients in the cubic polynomial based on the speed value and acceleration value corresponding to the joint point.

[0075] The acceleration value can be obtained by setting an acceleration sensor in the diaphragm tension compensation mechanism, and the obtained data is stored as the data of the first curve data set and the second curve data set. It can be obtained by calling the acceleration values ​​in the above-mentioned first curve data set and the second curve data set, or by calling from the fitted cam curve. The corresponding speed value can be obtained through the acceleration value and the displacement parameter.

[0076] Specifically, the preset condition may include the velocity and acceleration values ​​at the joint point in the first curve dataset being consistent with the velocity and acceleration values ​​at the corresponding joint point in the second curve dataset. In other words, the desired velocity at the joint point can be selected using the acceleration continuity principle at the connection point between the first and second curves, using the constraint that both the velocity and acceleration values ​​are continuous.

[0077] From formula ①, we can know that the cubic polynomials of the film collection stage and the film unloading stage can obtain the relationship between the speed value and the time parameter through the above preset conditions:

[0078]

[0079] From formula ①, we can know that the cubic polynomials of the film collection stage and the film unloading stage can obtain the relationship between the acceleration value and the time parameter through the above preset conditions:

[0080]

[0081] It is known that the first curve is continuous with the second curve, so when t is 0, θ1(0) = a1, θ2(0) = a 11 .

[0082] Since the two curves are continuous, assuming that the time at the joint point is t2, then θ1(t2)=a1+a2t2+a3t2 2 +a4t2 3 =θ2(0)=a 11 ,θ2(t2)=a 11 +a 12 t2+a 13t2 2 +a 14 t2 3 .

[0083] It is known that the speed of the traverse roller from the starting point on one side to the end point on the other side is 0, so when t is 0, v1(0)=a2=0, v1(t2)=a2t2+a3t2 1 +a4t2 2 =0.

[0084] Since the velocity and acceleration at the joint point are continuous, when t is t2, v1(t2)=v2(0)=a2+2a3t2 1 +3a4t2 2 =a 12 , g1(t2)=g2(0)=2a3+6a4t2=2a 13 .

[0085] Based on the above known conditions, the coefficients of the film collection stage and the film release stage are:

[0086] 1. a1=θ1(0) (the starting position is known)

[0087] 2. a2 = 0

[0088] 3.

[0089] 4.

[0090] 5.a 11 =θ1(t2)

[0091] 6.

[0092] 7.

[0093] 8.

[0094] By calculating the coefficients of the cubic polynomial in the above manner, the cubic polynomial can be solved, and a small number of cam parameters collected can be fitted into a large number of smooth cam curves with high precision through the cubic polynomial.

[0095] Specifically, by substituting time parameters corresponding to multiple different moments into the fitted cam curve, a greater number of cam parameters can be obtained compared to the original data. When applied to the control of lamination equipment, this cam curve can significantly reduce the number of manual commissioning attempts and debugging time, lowering the difficulty of equipment commissioning, thereby reducing the required skills of the commissioning personnel and the cost of equipment use. Furthermore, the smoother cam curve can reduce tension fluctuations in the diaphragm of the lamination equipment, improving the stability and reliability of the diaphragm unwinding and rewinding during the lamination process.

[0096] See also Figure 3-4 , Figure 3 ] shows the experimental results of the cache axis position waveform provided by the embodiment of the present application; Figure 4 Graph 2 shows the experimental results of the cache axis velocity waveform provided by the embodiment of the present application.

[0097] The buffer shaft is the shaft that drives the buffer roller to move. Figure 3-4 It can be seen that when the cam curve fitted in the above embodiment is applied to the lamination equipment, the differences in the positive and negative electrode laminations of the equipment can be clearly identified. In the data analysis of the single-wafer efficiency of 0.5S, the fluctuation of the tension swing roller is within +-0.35 degrees, and the tension fluctuation is within +-0.1N. This not only improves the single-wafer efficiency, but also maintains the fluctuation of the tension swing roller at a low level, improving the overall stability of the diaphragm belt during the lamination process.

[0098] Example 2

[0099] See also Figure 5 , the figure shows another implementation process of the cam curve fitting method.

[0100] like Figure 5 As shown, the cam curve fitting method may further include the following steps:

[0101] 201. Obtain time parameters and displacement parameters of the tension adjustment mechanism and the unwinding mechanism.

[0102] During the lamination process, the tension adjustment mechanism is used to complete the film winding and buffering actions of the diaphragm, while the unwinding mechanism is used to complete the film unwinding action. Both the tension adjustment mechanism and the unwinding mechanism can play a certain role in tension compensation during the film winding and unwinding stages. By obtaining the time parameters and displacement parameters of the tension adjustment mechanism and the unwinding mechanism, the cam parameters corresponding to the compensation actions of the tension adjustment mechanism and the unwinding mechanism during the film winding and unwinding processes can be obtained. Based on these cam parameters, a corresponding cam curve is generated, allowing the lamination equipment to perform compensation adjustments based on this cam curve.

[0103] By utilizing the cam parameters of the tension adjustment mechanism and the unwinding mechanism, the adjustment accuracy of the cam curve can be improved, thereby improving the diaphragm tension adjustment effect during the lamination process.

[0104] 202. Associate and map the time parameter and the displacement parameter at the same moment.

[0105] By using the time parameter and the displacement parameter at the same moment to perform correlation mapping, the cam parameters in the film collection stage and the film release stage can be used to generate the corresponding first curve and second curve respectively.

[0106] 203. Generate a first curve data set related to the film winding stage and a second curve data set related to the film unwinding stage according to the time parameters and displacement parameters of the tension adjustment unit and the unwinding unit.

[0107] For example, the first curve data set may include time parameters and displacement parameters at the first moment, time parameters and displacement parameters at the second moment, etc. Similarly, multiple cam parameters including the tension adjustment unit and the unwinding unit are obtained.

[0108] It can be understood that the first curve data set and the second curve data set may include a large number of cam parameters at different time points, such as collecting cam parameters at 50, 100 or 500 different time points. The specific number of time points of the cam parameters is not limited and can be determined according to the accuracy requirements of the generated cam curve.

[0109] Furthermore, the cam parameters of the tension adjustment unit and the unwinding unit at the same time can be associated, so that the cam curve can reflect the change in the total length of the diaphragm during the film winding stage and the film unwinding stage, and obtain a more accurate cam control method.

[0110] 204. Form a cam curve by fitting a cubic polynomial according to the first curve data set and the second curve data set.

[0111] Among them, according to the first curve data set and the second curve data set, a cam curve is formed by fitting a cubic polynomial. The fitting method of the cubic polynomial described in any of the above embodiments can be referred to. The present application does not limit its implementation method, as long as the multiple collected cam parameters can be smoothed and fitted to obtain the corresponding cam curve.

[0112] From the above, it can be seen that by collecting the time parameters and displacement parameters of the tension adjustment mechanism and the unwinding mechanism as cam parameters, and constructing a first curve data set and a second curve data set based on the above time parameters and displacement parameters, and forming a corresponding cam curve through cubic polynomial fitting, the accuracy of the cam curve can be made higher. When the stacking equipment applies the cam curve, its tension fluctuation is smaller, and the stability of the diaphragm during the film unwinding and winding process is higher, which can further reduce the difficulty of debugging and the cost of use.

[0113] Example 3

[0114] See also Figure 6 , the figure shows the control method of the lamination equipment provided in an embodiment of the present application.

[0115] like Figure 6 As shown, the control method can be applied to a diaphragm buffer mechanism, and the method may include the following steps:

[0116] 301. Obtain a preset cam curve.

[0117] The cam curve can be obtained by a cam curve fitting method, and the obtained cam curve is stored in a memory of the device so that it can be easily retrieved at any time.

[0118] Specifically, the cam curve fitting method may include the following steps: dividing the motion stages of the lamination process into a film-collecting stage and a film-releasing stage; respectively obtaining a plurality of continuous cam parameters related to the compensation action of the diaphragm tension compensation mechanism in the film-collecting stage and the film-releasing stage; forming a first curve data set related to the film-collecting stage and a second curve data set related to the film-releasing stage according to the cam parameters; and forming a cam curve through multiple polynomial fitting according to the first curve data set and the second curve data set.

[0119] During the operation of the laminating equipment, the unwinding mechanism continuously unwinds the diaphragm. As the transverse roller moves from one side of the starting point to the other side, the total length of the diaphragm decreases from maximum to minimum, that is, when the transverse roller moves to the upper part of the laminating table, the diaphragm buffer mechanism needs to rewind the diaphragm. This stage can be defined as the film rewinding stage. As the transverse roller further moves, the total length of the diaphragm decreases from minimum to maximum, that is, when the transverse roller moves to the other side relative to the starting point, the diaphragm buffer mechanism or unwinding mechanism needs to increase the degree of film unwinding. This stage can be defined as the film unwinding stage.

[0120] By distinguishing the motion stages of the lamination process, more targeted basic data can be provided, thereby ensuring that the fitted cam curve can achieve better control effects in different motion stages.

[0121] The first and second curve datasets may be composed of time parameters and displacement parameters of the diaphragm tension compensation mechanism at multiple moments. During the film retraction phase, the curve formed by the cam parameters is the first curve, and the dataset formed by the cam parameters is the first curve dataset. During the film unwinding phase, the curve formed by the cam parameters is the second curve, and the dataset formed by the cam parameters is the second curve dataset.

[0122] According to the first curve data set and the second curve data set, multiple polynomial fitting is performed to synthesize the first curve data set and the second curve data set into a smoother cam curve with greater quantity and higher precision. Thus, when applying the cam curve, it is possible to avoid the situation where the number of manual debugging times needs to be increased due to the small number of cam parameters.

[0123] Specifically, in order to ensure that the tension of the diaphragm is in a state with less fluctuation, the cam curve fitted by the cubic polynomial and the unwinding uniform speed PID can be used to adjust the tension swing roller, thereby controlling the tension swing roller so that it is in a balanced state, and performing PID control on the motor torque of the tension swing roller to achieve compensation for the diaphragm tension.

[0124] It is understandable that the specific implementation of the above fitting method can refer to Figure 1-5 The cam curve fitting method in any embodiment will not be described in detail in this application.

[0125] 302. Compensation control is performed on the film collecting stage or film releasing stage of the diaphragm buffer mechanism according to the cam curve.

[0126] The lamination device can perform compensation control on the buffer roller of the diaphragm buffer mechanism through a corresponding controller.

[0127] For example, when the stacking device is in the film collection stage during the stacking process, the diaphragm length that needs to be compensated corresponding to the cam curve at the current moment is a, and the buffer roller is controlled to perform corresponding displacement compensation, so that the stacking device can actively adjust the tension of the diaphragm through the buffer roller, thereby reducing the tension fluctuation of the stacking device during the stacking process.

[0128] Moreover, even if the stacking device generates new fluctuations during the film collection process, because the cam parameters of the diaphragm tension compensation mechanism during the film collection process have been taken into account in the fitting process of the cam curve, the new fluctuations can be further adjusted through the tension adjustment mechanism, so that the diaphragm fluctuation level can be continuously maintained at a low level during the film collection process of the stacking device.

[0129] It can be understood that after the stacking equipment applies this control method, the diaphragm buffer mechanism can use the cam parameters to actively adjust the tension, thereby obtaining a more reliable and stable diaphragm tension control effect, without the need for manual multiple adjustments to the diaphragm control, thereby improving the stability and reliability of the diaphragm unwinding and winding during the stacking process.

[0130] Example 4

[0131] See also Figure 7 , the figure shows the functional modules of the lamination equipment provided in the embodiment of the present application.

[0132] like Figure 7 As shown, the lamination device 100 may include a processor 110, a memory 120, and a membrane buffer mechanism 130. The memory 120 is electrically connected to the processor 110. The membrane buffer mechanism 130 is electrically connected to the processor 110 and is used to collect or release the membrane.

[0133] The memory 120 stores a computer program, and the processor 110 calls the computer program stored in the memory 120 to control the diaphragm buffer mechanism 130 to execute the following steps: Figure 6 The control method of the lamination equipment.

[0134] In some embodiments, the processor 110 may be further configured to perform the following steps:

[0135] The connection point between the first curve data set and the second curve data set is used as a joint point; and multiple polynomial fitting is performed based on the cam parameters of the joint point.

[0136] In some embodiments, the processor 110 may be further configured to perform the following steps:

[0137] The velocity value and the acceleration value corresponding to the joint point are determined according to preset conditions; and the coefficients in the cubic polynomial are obtained based on the velocity value and the acceleration value corresponding to the joint point.

[0138] In some embodiments, the processor 110 may be further configured to perform the following steps:

[0139] The time parameters and displacement parameters at the same moment are associated and mapped.

[0140] It is understood that the specific implementation of the above embodiment can refer to Figure 1-5The cam curve fitting method in any embodiment enables the lamination equipment to obtain a continuous, smooth cam curve based on the cam parameters of the diaphragm tension compensation mechanism during different motion phases. The lamination equipment utilizing this cam curve reduces diaphragm tension fluctuations, improving the stability and reliability of diaphragm unwinding and rewinding during the lamination process. Furthermore, this cam curve is compatible with different lamination equipment, reducing manual debugging time and lowering equipment operating costs.

[0141] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0142] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is typically placed when in use. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting this application. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0143] In this application, unless otherwise expressly specified or limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being above, above, and above a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being below, below, and below a second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0144] Although the present application is described in conjunction with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and variations based on the above content. Therefore, all such substitutions, modifications and variations are included in the spirit and scope of the appended claims.

Claims

1. A cam curve fitting method, applied to a lamination device, characterized in that: The lamination device includes a diaphragm tension compensation mechanism, and the method includes: The motion phase of the lamination process is divided into the film collection phase and the film release phase; Respectively acquiring a plurality of continuous cam parameters related to the compensation action of the diaphragm tension compensation mechanism in the film collecting stage and the film releasing stage; forming a first curve data set related to the film collecting stage and a second curve data set related to the film releasing stage according to the cam parameters; A cam curve is formed by multiple polynomial fitting according to the first curve data set and the second curve data set.

2. The cam curve fitting method according to claim 1, characterized in that: The forming of a cam curve by multiple polynomial fitting according to the first curve data set and the second curve data set comprises: Using the connection point between the first curve data set and the second curve data set as a joint point; Multiple polynomial fitting is performed based on the cam parameters of the joint points.

3. The cam curve fitting method according to claim 2, characterized in that: The multi-time polynomial is a cubic polynomial, and the formula of the cubic polynomial is: Wherein, θ1 is the displacement parameter in the first curve data set, θ2 is the displacement parameter in the second curve data set, t is the time parameter corresponding to the displacement parameter, a1, a2, a3, a4 are the coefficients of the cubic polynomial in the first curve data set, a 11 、a 12 、a 13 、a 14 are the coefficients in the cubic polynomial of the second curve data set.

4. The cam curve fitting method according to claim 3, characterized in that: The forming of the cam curve by multiple polynomial fittings also includes: Determine the velocity value and acceleration value corresponding to the joint point according to preset conditions; The coefficients in the cubic polynomial are obtained based on the velocity value and the acceleration value corresponding to the joint point.

5. The cam curve fitting method according to claim 4, characterized in that: The preset conditions include: The velocity values ​​and acceleration values ​​at the joint points in the first curve data set are respectively consistent with the velocity values ​​and acceleration values ​​at the corresponding joint points in the second curve data set.

6. The cam curve fitting method according to any one of claims 1 to 5, characterized in that: The diaphragm tension compensation mechanism includes a tension adjustment mechanism and / or an unwinding mechanism.

7. The cam curve fitting method according to claim 6, characterized in that: The cam parameters include time parameters and displacement parameters of the tension adjustment mechanism and the unwinding mechanism.

8. The cam curve fitting method according to any one of claims 1 to 5, characterized in that: The first curve data set and the second curve data set at least include a plurality of time parameters and a plurality of displacement parameters of the diaphragm tension compensation mechanism; The forming of a first curve data set related to the film collecting stage and a second curve data set related to the film releasing stage according to the cam parameters includes: The time parameter and the displacement parameter at the same time are associated and mapped.

9. A control method for a lamination device, the lamination device comprising a diaphragm buffer mechanism, characterized in that: The control method is applied to the diaphragm buffer mechanism, and the method comprises: Get the preset cam curve; Compensation control is performed on the film collecting stage or film releasing stage of the diaphragm buffer mechanism according to the cam curve; Wherein, the cam curve is obtained by fitting according to the cam curve fitting method according to any one of claims 1-8.

10. A lamination device, characterized in that: include: processor; A memory, the memory being electrically connected to the processor; as well as A membrane buffer mechanism, the membrane buffer mechanism is electrically connected to the processor and is used for collecting or releasing the membrane; A computer program is stored in the memory, and the processor controls the diaphragm buffer mechanism to execute the control method of the lamination device as described in claim 9 by calling the computer program stored in the memory.

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