Lamination machine and control method thereof, and computer readable storage medium

Abstract

The present invention discloses a diaphragm tension control method for a stacking machine, the method comprising: controlling the movement of the film-drawing roller group to lay the diaphragm provided by the feeding device on the stacking table; during the movement of the film-drawing roller group, determining the first motion control parameter of the stacking table according to the movement characteristic parameter of the film-drawing roller group; controlling the movement of the stacking table according to the first motion control parameter to maintain the diaphragm in the stacking machine in a tensioned state. The present invention also discloses a stacking machine and a computer-readable storage medium. The present invention aims to avoid the loosening of the film during battery stacking, which leads to drastic fluctuations in the diaphragm tension, and can improve stacking efficiency, stacking stability and the performance of the produced battery.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial automation, and in particular to a tension control method of a laminating machine, a laminating machine and a computer-readable storage medium. Background Art

[0002] The interior of a lithium battery is generally composed of a positive electrode, a negative electrode, and a diaphragm. In the manufacturing process of lithium batteries, some are produced using a lamination process, specifically, the diaphragm is stacked on a lamination table by a lamination machine, and electrodes are set between the stacked layers of diaphragms to form a lithium battery. The tension control of the diaphragm is the most critical process in the lamination process, which directly determines the production efficiency and the performance of the produced battery.

[0003] At present, the stacking machine generally adjusts the diaphragm through the storage shaft. When the length of the diaphragm in the film-pulling part decreases, the storage shaft recovers the diaphragm through horizontal movement. When the length of the film-pulling part increases, the storage shaft releases the diaphragm through horizontal movement to cooperate with it, thereby realizing the dynamic tension control of the isolation film. Figure 7 As shown in the figure, this tension control method relies on the rotation speed of the roller set between the tension swing rod and the storage shaft to achieve tension control. When the speed required by the roller continues to increase, the tension of the diaphragm itself cannot provide sufficient acceleration for the roller, and the roller cannot reach the required speed in time to deliver the diaphragm to the storage shaft, resulting in a certain amount of looseness. At this time, the storage shaft will obtain a certain amount of diaphragm from the tension swing rod, pulling the swing rod away from the equilibrium position. Subsequently, when the film pulling shaft passes through the theoretical reversing point, the running direction of the diaphragm changes, and the previously loose diaphragm will be suddenly straightened by the film pulling shaft, thereby generating a large impact load on the isolation membrane. In theory, the greater the speed, the stronger the impact, and the more intense the change in the tension of the diaphragm, which will have a great impact on the stacking efficiency, the alignment accuracy of the stacked battery, the ion passing performance, and the stability of the stacking process. Summary of the invention

[0004] The main purpose of the present invention is to provide a diaphragm tension control method for a stacking machine, a stacking machine and a computer-readable storage medium, aiming to overcome the problem that the diaphragm tension changes drastically in the tension control scheme of the above-mentioned stacking machine, affecting the stacking efficiency and the performance of the produced batteries.

[0005] To achieve the above object, the present invention provides a diaphragm tension control method for a laminating machine, the laminating machine comprising a feeding device, a film drawing roller group and a laminating table arranged below the film drawing roller group, the diaphragm tension control method for the laminating machine comprising the following steps:

[0006] Controlling the film-drawing roller group to move so as to lay the diaphragm provided by the feeding device on the laminating table;

[0007] During the movement of the film-drawing roller group, determining the first motion control parameter of the laminating platform according to the movement characteristic parameter of the film-drawing roller group;

[0008] The movement of the lamination table is controlled according to the first motion control parameter so that the diaphragm in the lamination machine is maintained in a tensioned state.

[0009] Optionally, the step of controlling the movement of the film-drawing roller group includes:

[0010] Controlling the film-drawing roller group to move from a first position toward a second position, wherein the first position and the second position are both located above the lamination table and are spaced apart from each other;

[0011] Before the step of determining the first motion control parameter of the lamination platform according to the movement characteristic parameter of the film drawing roller group, the method further includes:

[0012] During the movement of the film-drawing roller group, the movement time of the film-drawing roller group is acquired, the movement time is counted from when the film-drawing roller group is located at the first position, and the movement characteristic parameter includes the movement time.

[0013] Optionally, the step of determining the first motion control parameter of the lamination platform according to the movement characteristic parameter of the film drawing roller group includes:

[0014] The displacement control parameter of the stacking table is determined according to the moving time, and / or the acceleration control parameter of the stacking table is determined according to the moving time, and the first motion control parameter includes the displacement control parameter and / or the acceleration control parameter.

[0015] Optionally, the step of determining the displacement control parameter of the lamination table according to the movement time includes:

[0016] When the moving time is less than a first set time threshold, determining the displacement control parameter as the lamination table moving away from the film-drawing roller group along a first direction;

[0017] When the moving time is greater than or equal to the first set time threshold, the displacement control parameter is determined as the lamination table moving along the second direction toward the film drawing roller group.

[0018] Optionally, the first direction is downward or the first direction is opposite to the moving direction of the film-drawing roller group;

[0019] And / or, the first direction is opposite to the second direction.

[0020] Optionally, the step of determining the displacement control parameter of the lamination table according to the movement time further includes:

[0021] If the laminating table is located at the reference position when the film-drawing roller group is located at the first position, then when the moving time is less than the first set time threshold and greater than or equal to the second set time threshold, the step of determining the displacement control parameter is that the laminating table moves away from the film-drawing roller group along the first direction is performed; when the moving time is less than the second set time threshold, the displacement control parameter is determined that the laminating table maintains the reference position;

[0022] Wherein, the reference position is the position where the diaphragm in the stacking machine is in a tensioned state when the film-drawing roller group is located at the first position, and the second set time threshold is less than the first set time threshold.

[0023] Optionally, when the moving time is greater than or equal to the first set time threshold, the step of determining the displacement control parameter for the laminating table to move along the second direction toward the film-drawing roller group is performed before or after the step of determining the displacement control parameter, and the step of determining the acceleration control parameter of the laminating table according to the moving time includes:

[0024] When the moving time is greater than or equal to the first set time threshold and less than a third set time threshold, determining the first acceleration as the acceleration control parameter;

[0025] When the moving time is greater than or equal to the third set time threshold, determining the second acceleration as the acceleration control parameter;

[0026] The directions of the first acceleration and the second acceleration are both the same as the second direction, the first acceleration is smaller than the second acceleration, and the third set time threshold is larger than the first set time threshold.

[0027] Optionally, when the moving time is less than a first set time threshold, the step of determining the displacement control parameter for the laminating table to move away from the film-drawing roller group along the first direction is performed simultaneously with or after the step of determining the displacement control parameter for the laminating table to move away from the film-drawing roller group. The step of determining the acceleration control parameter of the laminating table according to the moving time includes:

[0028] When the moving time is less than the first set time threshold and greater than or equal to the fourth set time threshold, determining the third acceleration as the acceleration control parameter;

[0029] When the moving time is less than the fourth set time threshold, determining a fourth acceleration as the acceleration control parameter;

[0030] The direction of the third acceleration is opposite to the first direction, and the direction of the fourth acceleration is the same as the first direction.

[0031] Optionally, the feeding device includes an unwinding module and a storage module, and the storage module is used to compensate for the expansion and contraction of the diaphragm between the unwinding module and the film drawing roller group through movement. The diaphragm tension control method of the laminating machine also includes:

[0032] Controlling the unwinding module to release the diaphragm and executing the step of controlling the film drawing roller group to move so as to lay the diaphragm provided by the feeding device on the laminating table;

[0033] After the step of determining the first motion control parameter of the laminating platform according to the movement characteristic parameter of the film-drawing roller group during the movement of the film-drawing roller group, the method further includes:

[0034] Determining a second motion control parameter of the storage module according to the movement characteristic parameter and the first motion control parameter;

[0035] The movement of the storage module is controlled according to the second motion control parameter so that the diaphragm in the stacking machine is maintained in a tensioned state.

[0036] In addition, in order to achieve the above-mentioned purpose, the present application also proposes a laminating machine, which comprises:

[0037] Feeding device;

[0038] Film drawing roller set;

[0039] A lamination platform, the lamination platform is arranged below the film drawing roller group;

[0040] A control device, wherein the feeding device, the film-drawing roller group and the stacking table are all connected to the control device, and the control device comprises: a memory, a processor and a control program of the stacking machine stored in the memory and executable on the processor, wherein the control program of the stacking machine implements the steps of the diaphragm tension control method of the stacking machine as described in any one of the above items when executed by the processor.

[0041] In addition, in order to achieve the above-mentioned purpose, the present application also proposes a computer-readable storage medium, on which a control program of a stacking machine is stored. When the control program of the stacking machine is executed by a processor, the steps of the diaphragm tension control method of the stacking machine as described in any of the above items are implemented.

[0042] The present invention proposes a control method for a battery gasket machine. In the process of laying the diaphragm provided by a feeding device on a stacking table by moving a film-drawing roller group, the method controls the movement of the stacking table based on the moving characteristic parameters of the film-drawing roller group. The movement of the stacking table can adjust the length of the diaphragm between the film-drawing module and the stacking table. The stacking table moves in accordance with the movement of the film-drawing roller group, and can effectively compensate for the change in the length of the diaphragm between the stacking table and the film-drawing roller group caused by the movement of the film-drawing roller group, which is beneficial to ensuring that the length of the diaphragm between the stacking table and the film-drawing roller group remains stable, so that the diaphragm in the stacking machine is maintained in a tensioned state during the stacking process, and can effectively avoid the loosening of the film during the battery stacking process, which leads to a strong fluctuation in the diaphragm tension, thereby not only improving the stacking efficiency and stability during the battery production process, but also improving the performance of the produced battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a simplified structural schematic diagram of the laminating machine of the present invention;

[0044] Figure 2 A schematic diagram of the hardware structure involved in the operation of a laminating machine according to an embodiment of the present invention;

[0045] Figure 3 It is a flow chart of an embodiment of a method for controlling the diaphragm tension of a laminating machine according to the present invention;

[0046] Figure 4 It is a flow chart of another embodiment of the diaphragm tension control method of the laminating machine of the present invention;

[0047] Figure 5 It is a flow chart of another embodiment of the diaphragm tension control method of the laminating machine of the present invention;

[0048] Figure 6 It is a schematic diagram of the relationship between the moving time of the film drawing roller group involved in the diaphragm tension control method of the laminating machine of the present invention and the motion control parameters of the laminating machine;

[0049] Figure 7 It is a schematic diagram of the tension control architecture of a laminating machine in the prior art.

[0050] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0051] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0052] The main solution of the embodiment of the present invention is: controlling the movement of the film-drawing roller group to lay the diaphragm provided by the feeding device on the stacking table; during the movement of the film-drawing roller group, determining the first motion control parameter of the stacking table according to the movement characteristic parameters of the film-drawing roller group; controlling the movement of the stacking table according to the first motion control parameter to keep the diaphragm in the stacking machine in a tensioned state.

[0053] In the prior art, when the film-pulling roller group of the stacking machine moves at a fast speed, the diaphragm cannot provide sufficient tension for the roller acceleration, and the roller movement speed is insufficient, which can easily cause the diaphragm in the diaphragm stacking machine to loosen, affecting not only the efficiency and stability of the stacking, but also the performance of the produced batteries.

[0054] The present invention provides the above-mentioned solution, aiming to effectively avoid loosening of the pulling film during the battery lamination process, thereby improving the lamination efficiency and stability during the battery production process and improving the performance of the produced battery.

[0055] An embodiment of the present invention provides a stacking machine, which is specifically used for producing stacked batteries.

[0056] In the embodiment of the present invention, refer to Figure 1 The laminating machine comprises a feeding device, a film-drawing roller group 4, a laminating platform 6 arranged below the film-drawing roller group 4, and a control device. The feeding device, the film-drawing roller group 4, and the laminating platform 6 are all connected to the control device.

[0057] The feeding device can be used to provide a diaphragm for the film-drawing roller group 4. Specifically, in the present embodiment, the feeding device includes a unwinding module 1 and a storage module 3. The unwinding module 1 can automatically release the diaphragm under the drive of the unwinding motor, and can replenish the diaphragm consumed in each lamination process. The storage module 3 is arranged between the unwinding module 1 and the film-drawing roller group 4. The storage module 3 is a movable mechanism. The storage module 3 can store the remaining diaphragm between the unwinding module 1 and the film-drawing roller group 4 generated by the operation of the unwinding module 1 and the movement of the film-drawing roller group 4 through movement. Among them, the unwinding module 1 can release the diaphragm at a uniform speed, and the moving position of the storage module 3 varies with the moving position of the film-drawing roller group 4. Specifically, when the length of the diaphragm between the film pulling roller group 4 and the stacking table 6 decreases, the storage module 3 can move toward a first preset direction to increase the amount of diaphragm stored therein; when the length of the diaphragm between the film pulling roller group 4 and the stacking table 6 increases, the storage module 3 can move toward a second preset direction opposite to the first preset direction to reduce the amount of diaphragm stored therein.

[0058] Further, in this embodiment, referring to Figure 1The feeding device further includes a guide roller group disposed between the material storage module 3 and the film drawing roller group 4, and the guide roller group specifically guides the diaphragm output from the material storage module 3 to the film drawing roller group 4. The guide roller group includes a plurality of rollers, and the plurality of rollers are spaced to form a channel for the diaphragm to pass through, which can be used to limit the movement of the diaphragm in the moving direction of the film drawing roller group 4. Among them, the plurality of rollers are follower rollers, which can rotate with the movement of the diaphragm.

[0059] Further, in this embodiment, referring to Figure 1 The feeding device also includes a rocker mechanism 2 arranged between the unwinding module 1 and the storage module 3. The rocker mechanism 2 includes a rocker motor and a rocker connected to the rocker motor. Specifically, the PID algorithm is used to determine the operating parameters of the rocker motor according to the operating parameters of the unwinding module 1 to correct the position of the rocker so that the rocker can be maintained in a balanced position during the stacking process. The rocker can provide a certain tension for the diaphragm between the unwinding module 1 and the storage module 3 and serve as a diaphragm buffer.

[0060] Specifically, the film-drawing roller group 4 is a movable mechanism, and the specific moving direction of the film-drawing roller group 4 is parallel to the table surface of the stacking table 6. The film-drawing roller group 4 includes a plurality of rollers, and the plurality of rollers are follower rollers, which can rotate along with the movement of the diaphragm. A channel for the diaphragm to pass through is formed between the plurality of rollers. The film-drawing roller group 4 can reciprocate between a first position and a second position above the stacking table 6. The film-drawing roller group 4 lays the diaphragm on the stacking table 6 during the process of moving from the first position to the second position. When the film-drawing roller group 4 is in the second position, the electrode sheet is stacked on the currently laid diaphragm. The film-drawing roller group 4 then moves from the second position to the first position to cover the diaphragm on the electrode sheet, and then moves from the first position to the second position, and repeats this process.

[0061] Specifically, the lamination platform 6 is a movable mechanism. In this embodiment, the lamination platform 6 can move in the vertical direction or the horizontal direction. In other embodiments, the lamination platform 6 also moves in other directions, such as a direction with an angle of 45 degrees or 60 degrees to the vertical direction.

[0062] Further, in this embodiment, referring to Figure 1 The stacking machine also includes a clamping member 5, which specifically refers to two sets of pressing knives on the stacking table 6. The function of the pressing knives is to press the left or right side of the diaphragm laid on the stacking table 6 to ensure that the diaphragm on the stacking table 6 does not slide during the movement of the film-drawing roller group 4.

[0063] In the embodiment of the present invention, refer to Figure 2The control device of the stacking machine includes: a processor 1001 (such as a CPU), a memory 1002, a timer 1003, etc. The memory 1002 can be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. The memory 1002 can also be a storage device independent of the aforementioned processor 1001.

[0064] Those skilled in the art will understand that Figure 2 The device structure shown in the figure does not constitute a limitation of the device, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0065] like Figure 2 As shown, the memory 1002 as a computer-readable storage medium may include a control program of the laminating machine. Figure 2 In the device shown, the processor 1001 can be used to call the control program of the laminating machine stored in the memory 1002, and execute the relevant steps of the diaphragm tension control method of the laminating machine in the following embodiment.

[0066] An embodiment of the present invention further provides a diaphragm tension control method for a laminating machine, which is applied to the above-mentioned laminating machine.

[0067] Reference Figure 3 , an embodiment of a diaphragm tension control method of a laminating machine of the present application is proposed. In this embodiment, the diaphragm tension control method of the laminating machine includes:

[0068] Step S10, controlling the film-drawing roller group to move so as to lay the diaphragm provided by the feeding device on the lamination table;

[0069] Specifically, the first setting position (such as Figure 1 A position in the middle) and the second setting position (such as Figure 1 The B position in the figure) are two positions spaced apart above the stacking table, and the projection of the discharge port of the guide roller group in the feeding device on the line between the first set position and the second set position is the midpoint position of the line between the first position and the second position.

[0070] Specifically, the film-drawing roller group is controlled to reciprocate between the first set position and the second set position. The film-drawing roller group completes one displacement between the first set position and the second set position, and a layer of diaphragm is laid on the laminating table accordingly.

[0071] Step S20, during the movement of the film-drawing roller group, determining the first motion control parameter of the lamination platform according to the movement characteristic parameter of the film-drawing roller group;

[0072] The moving characteristic parameters include moving speed, moving time, moving acceleration and / or moving time, etc., which are parameters that characterize the moving characteristics of the film-drawing roller group.

[0073] The moving characteristic parameter may be a parameter obtained by detecting the motion state of the film-drawing roller group in real time. In addition, the moving characteristic parameter may also be a parameter determined according to a preset control parameter of the film-drawing roller group movement, which may be pre-stored in a memory, wherein the movement of the film-drawing roller group may be controlled according to the preset control parameter (such as preset duration, preset speed and / or preset acceleration, etc.).

[0074] The first motion control parameters specifically include control parameters of the motion state (such as static state or moving state) of the stacking platform, and parameters for controlling the moving characteristics of the stacking platform in the moving state (such as speed, displacement, acceleration and / or target position, etc.).

[0075] Different moving characteristic parameters correspond to different first motion control parameters. For example, the moving directions of different film-drawing roller groups correspond to different moving directions of the laminating table; the moving accelerations of different film-drawing roller groups correspond to different moving accelerations of the laminating table; the moving positions of different film-drawing roller groups correspond to different moving positions of the laminating table. The corresponding relationship between the moving characteristic parameters and the first motion control parameters can be preset, and can be a mapping relationship or a calculation relationship. Based on this, the result obtained by matching the preset mapping relationship through the moving characteristic parameters can be used as the first motion control parameter, and the result obtained by substituting the moving characteristic parameters into a preset formula can also be used as the first motion control parameter.

[0076] Step S30, controlling the movement of the lamination table according to the first motion control parameter so that the diaphragm in the lamination machine maintains a tensioned state.

[0077] A method for controlling the diaphragm tension of a stacking machine is proposed in an embodiment of the present invention. In the method, during the process of laying the diaphragm provided by a feeding device on a stacking table by moving a film-drawing roller group, the movement of the stacking table is controlled based on the moving characteristic parameters of the film-drawing roller group. The movement of the stacking table can adjust the length of the diaphragm between the film-drawing module and the stacking table. The stacking table moves in accordance with the movement of the film-drawing roller group, and can effectively compensate for the change in the diaphragm length between the stacking table and the film-drawing roller group caused by the movement of the film-drawing roller group. This is beneficial to ensuring that the diaphragm length between the stacking table and the film-drawing roller group remains stable, thereby maintaining the diaphragm in the stacking machine in a tensioned state during the stacking process, and can effectively prevent the film from loosening during battery stacking, thereby improving the stacking efficiency and stability during battery production, and improving the performance of the produced batteries.

[0078] Further, based on the above embodiment, another embodiment of the diaphragm tension control method of the laminating machine of the present application is proposed. In this embodiment, referring to Figure 4, the step of controlling the movement of the film-drawing roller group comprises:

[0079] Step S11, controlling the film-drawing roller group to move from a first position toward a second position, wherein the first position and the second position are both located above the lamination table and are spaced apart from each other;

[0080] The first position here is one of the first setting position and the second setting position mentioned above, and the second position is the other of the first setting position and the second setting position.

[0081] Based on step S11, before the step of determining the first motion control parameter of the laminating table according to the movement characteristic parameter of the film drawing roller group, the step further includes:

[0082] Step S201, during the movement of the film-drawing roller group, obtaining the movement time of the film-drawing roller group, wherein the movement characteristic parameters include the movement time.

[0083] The moving time represents the duration of the movement of the film-drawing roller group from the first position to the second position. The moving time specifically starts from when the film-drawing roller group is located at the first position.

[0084] In this embodiment, since the length of the diaphragm between the film-pulling roller group and the stacking table is different as the moving time of the film-pulling roller group is different, the movement of the stacking table is controlled according to the moving time, thereby ensuring the accuracy of the determined first motion control parameter, and effectively maintaining the tensioning state of the diaphragm in the stacking machine, so as to effectively avoid the loosening of the film during the battery stacking process, which leads to strong fluctuations in the diaphragm tension, thereby not only improving the stacking efficiency and stability in the battery production process, but also improving the performance of the produced batteries.

[0085] Further, in this embodiment, referring to Figure 4 Based on step S201, the step of determining the first motion control parameter of the lamination platform according to the movement characteristic parameter of the film drawing roller group includes:

[0086] Step S202, determining a displacement control parameter of the stacking table according to the moving time, and / or determining an acceleration control parameter of the stacking table according to the moving time, wherein the first motion control parameter includes the displacement control parameter and / or the acceleration control parameter.

[0087] The displacement control parameter is specifically a parameter used to control the displacement amount and / or displacement direction of the lamination platform relative to its current position. The acceleration control parameter is specifically a parameter used to control the acceleration direction and / or acceleration magnitude of the movement of the lamination platform.

[0088] In an implementation of this embodiment, the displacement control parameter and the acceleration control parameter of the lamination table are determined according to the moving time.

[0089] In another implementation of this embodiment, the displacement control parameters of the stacking table are determined according to the moving time, and the acceleration control parameters can be determined based on other types of moving characteristic parameters of the film drawing roller group (such as moving speed, etc.) and / or motion characteristic parameters of the motion mechanism in the feeding device (such as the unwinding speed of the unwinding module).

[0090] In another implementation of this embodiment, the acceleration control parameters of the stacking table are determined according to the moving time, and the displacement control parameters can be determined based on other types of moving characteristic parameters of the film drawing roller group (such as moving speed, etc.) and / or motion characteristic parameters of the motion mechanism in the feeding device (such as the unwinding speed of the unwinding module).

[0091] In this embodiment, the displacement control parameters and / or acceleration control parameters of the stacking table are determined according to the moving time of the film-drawing roller group, thereby ensuring that the displacement of the stacking table and / or the acceleration during the movement are coordinated with the movement of the film-drawing roller group to accurately ensure the tensioning state of the diaphragm in the stacking machine and effectively prevent the diaphragm from loosening.

[0092] Further, based on the above embodiment, another embodiment of the diaphragm tension control method of the laminating machine of the present application is proposed. In this embodiment, referring to Figure 5 , the step of determining the displacement control parameter of the lamination table according to the moving time comprises:

[0093] Step S21, when the moving time is less than a first set time threshold, determining the displacement control parameter to be that the laminating table moves away from the film drawing roller group along a first direction;

[0094] Step S22: when the moving time is greater than or equal to the first set time threshold, determining the displacement control parameter as the lamination table moving along the second direction toward the film drawing roller group.

[0095] The first direction and the second direction may be preset fixed directions, or may be directions determined according to the current moving direction of the film-drawing roller group.

[0096] In this embodiment, the first direction is downward (eg Figure 1 D direction) or the first direction and the moving direction of the film-drawing roller group (such as Figure 1 E direction) in the opposite direction (such as Figure 1The first direction is opposite to the second direction. That is, the first direction is downward (such as vertically downward or diagonally downward), and the second direction is upward (such as vertically upward or diagonally upward); the first direction is the direction from the second position to the first position, and the second direction is the direction from the first position to the second position. In other embodiments, the first direction and the second direction may also be different and non-opposite directions, for example, the first direction is downward, and the second direction is the same direction as the moving direction of the film-drawing roller group.

[0097] The first set time threshold is specifically a critical value of the moving time used to distinguish different changing trends of the membrane length between the film-drawing roller group and the reference position where the stacking platform is currently located. If the moving time is less than the first set time threshold, it indicates that the membrane length between the film-drawing roller group and the reference position of the stacking platform tends to decrease with the increase of the moving time. The smaller the membrane length between the film-drawing roller group and the reference position of the stacking platform, the greater the membrane margin between the film-drawing roller group and the feeding device, and the more likely it is to loosen. At this time, by moving the stacking platform away from the film-drawing roller group and absorbing the generated membrane margin through the movement of the stacking platform, it can ensure that the membrane length between the film-drawing roller group and the stacking platform is maintained in a relatively constant state, thereby effectively avoiding the loosening of the membrane in the stacking machine. If the moving time is greater than or equal to the first set time threshold, it indicates that the membrane length at the reference position between the film-drawing roller group and the stacking platform tends to increase with the increase of the moving time. The greater the membrane length between the film-pulling roller group and the reference position of the stacking table, the smaller the membrane margin between the film-pulling roller group and the feeding device, and the less likely it is to loosen. At this time, the stacking table is moved toward the film-pulling roller group to ensure that the stacking machine does not loosen and the membrane length between the film-pulling roller group and the stacking table is not too long to affect the production accuracy of the stacked battery, thereby ensuring that there is no looseness while ensuring the production quality of the stacked battery.

[0098] Furthermore, in this embodiment, the step of determining the displacement control parameter of the lamination table according to the moving time further includes:

[0099] If the laminating table is located at the reference position when the film-drawing roller group is located at the first position, then when the moving time is less than the first set time threshold and greater than or equal to the second set time threshold, the step of determining the displacement control parameter is that the laminating table moves away from the film-drawing roller group along the first direction is performed; when the moving time is less than the second set time threshold, the displacement control parameter is determined that the laminating table maintains the reference position;

[0100] Wherein, the reference position is the position where the diaphragm in the stacking machine is in a tensioned state when the film-drawing roller group is located at the first position, and the second set time threshold is less than the first set time threshold.

[0101] Specifically, when the moving time is greater than or equal to the first set time threshold, the displacement control parameter may be determined as the displacement control parameter for the lamination platform to move to a reference position along the second direction toward the film-drawing roller group.

[0102] In this embodiment, if the film-pulling roller group is located at the first position where the stacking table is located, the diaphragm in the battery gasket machine is already in a tensioned state. At this time, the diaphragm is less likely to loosen in a short period of time. In order to avoid the stacking table moving away from the film-pulling roller group, causing excessive tension of the diaphragm to damage the performance of the diaphragm, the moving time is less than the first set time threshold. When the moving time is less than the second set time threshold, the stacking table is maintained at the current reference position (that is, the displacement is 0). When the moving time is greater than or equal to the second set time threshold, the stacking table is controlled to move away from the film-pulling roller group based on the displacement control parameters, thereby avoiding the loosening of the diaphragm in the stacking machine and ensuring that the performance of the produced laminated battery meets the use requirements.

[0103] Further, based on the above embodiment, another embodiment of the diaphragm tension control method of the laminating machine of the present application is proposed. In this embodiment, the step of determining the first motion control parameter of the laminating table according to the moving characteristic parameters of the film drawing roller group includes: determining the displacement control parameter of the laminating table according to the moving time, and determining the acceleration control parameter of the laminating table according to the moving time, and the first motion control parameter includes the displacement control parameter and the acceleration control parameter. Based on this, the determination process of the displacement control parameter can be determined in the manner of the above embodiment, and the step of determining the acceleration control parameter of the laminating table according to the moving time includes:

[0104] Step S23, when the moving time is greater than or equal to the first set time threshold and less than a third set time threshold, determining the first acceleration as the acceleration control parameter;

[0105] Step S24, when the moving time is greater than or equal to the third set time threshold, determining the second acceleration as the acceleration control parameter;

[0106] The directions of the first acceleration and the second acceleration are both the same as the second direction, the first acceleration is smaller than the second acceleration, and the third set time threshold is larger than the first set time threshold.

[0107] Among them, step S23 and step S24 can be executed at the same time as or after step S22, and the execution order between the steps is not specifically limited.

[0108] In this embodiment, during the process of the stacking table moving toward the film-pulling roller group after moving away from the film-pulling roller group, the stacking table is first controlled to accelerate slowly, and then controlled to accelerate at a higher speed. Since the length of the diaphragm between the film-pulling roller group and the stacking table is relatively long in the initial stage of the stacking table moving toward the film-pulling roller group, slowly accelerating the stacking table at this time can avoid the stacking table moving too fast, resulting in a large amount of diaphragm margin in a short time, causing the diaphragm in the stacking machine to loosen. After the length of the diaphragm is reduced after the stacking table moves toward the film-pulling roller group for a period of time, the stacking table is quickly accelerated again to quickly return to the original reference position, so as to avoid the diaphragm from loosening while making the stacking table and the film-pulling roller group cooperate to ensure the alignment accuracy of the manufactured laminated battery.

[0109] It should be noted that, in other embodiments, when the moving time is greater than or equal to the first set time threshold, the acceleration control parameter of the stacking table may also be determined to be a constant acceleration.

[0110] Further, in this embodiment, the step of determining the acceleration control parameter of the stacking table according to the moving time includes:

[0111] Step S25, when the moving time is less than the first set time threshold and greater than or equal to the fourth set time threshold, determining the third acceleration as the acceleration control parameter;

[0112] Step S26, when the moving time is less than the fourth set time threshold, determining the fourth acceleration as the acceleration control parameter; the direction of the third acceleration is opposite to the first direction, and the direction of the fourth acceleration is the same as the first direction.

[0113] Among them, step S25 and step S26 can be executed at the same time as or after step S21, and the execution order between the steps is not specifically limited.

[0114] In this embodiment, through the above method, when the stacking table moves away from the film-pulling roller group, the stacking table can be first accelerated by the fourth acceleration control, and then decelerated by the third acceleration control, so that the stacking table can be accurately moved to the preset target position (the position farthest from the film-pulling roller group), and the stability of the movement of the stacking table can be ensured, and the large fluctuation of the diaphragm length between the stacking table and the film-pulling roller group can be avoided, thereby further improving the reliability of preventing the occurrence of diaphragm loosening in the stacking machine.

[0115] Further, in order to better understand the process of determining the first motion control parameter related scheme of the stacking table based on the moving time in the battery gasket machine involved in the above embodiment, combined with Figure 6 Explanation of the above scheme:

[0116] Figure 6The curve in FIG. 1 represents the relationship between the movement time of the film-drawing roller group from the first position to the second position (0-0.25s) and the motion parameters of the laminating table.

[0117] Figure 6 (a) is a curve representing the relationship between the moving time and the displacement of the stacking table. A displacement of 0 represents the reference position mentioned in the above embodiment, and a negative value of the displacement represents the offset of the stacking table from the reference position during the movement away from the film-drawing roller group.

[0118] Figure 6 (b) is a curve representing the relationship between the moving time and the acceleration of the stacking table. When the acceleration is a positive value, it represents the acceleration direction of the stacking table, which is the direction from the stacking table to the film-pulling roller group. When the acceleration is a negative value, it represents the acceleration direction from the stacking table to the film-pulling roller group.

[0119] Among them, 0.15 is the above-mentioned first set time threshold, 0.05 is the above-mentioned second set time threshold, 0.20 is the above-mentioned third set time threshold, and 0.10 is the above-mentioned fourth set time threshold.

[0120] Based on this, the time 0.25s required for the film-stretching roller group to move from the first position to the second position is divided into 5 time periods. In the first time period (0-0.05s), the stacking table maintains the reference position, in the second time period (0.05s-0.10s), the stacking table accelerates toward a position away from the film-stretching roller group, in the third time period (0.10s-0.15s), the stacking table decelerates toward a position away from the film-stretching roller group, in the fourth time period (0.15s-0.20s), the stacking table slowly accelerates toward the film-stretching roller group, and in the fifth time period (0.20s-0.25s), the stacking table quickly accelerates toward the film-stretching roller group.

[0121] Further, based on the above embodiment, another embodiment of the diaphragm tension control method of the stacking machine of the present application is proposed. In this embodiment, the feeding device includes a reeling module and a storage module, and the storage module is used to compensate the expansion and contraction amount of the diaphragm between the reeling module and the film drawing roller group through movement. The diaphragm tension control method of the stacking machine also includes:

[0122] Controlling the unwinding module to release the diaphragm and executing the step of controlling the film drawing roller group to move so as to lay the diaphragm provided by the feeding device on the laminating table;

[0123] After the step of determining the first motion control parameter of the laminating platform according to the movement characteristic parameter of the film-drawing roller group during the movement of the film-drawing roller group, the method further includes:

[0124] Determining a second motion control parameter of the storage module according to the movement characteristic parameter and the first motion control parameter;

[0125] The movement of the storage module is controlled according to the second motion control parameter so that the diaphragm in the stacking machine is maintained in a tensioned state.

[0126] The second motion control parameter here may include the moving direction of the material storage module. Further, the second motion control parameter may also include the moving speed and / or moving acceleration of the material storage module.

[0127] Different movement characteristic parameters and different first motion control parameters correspond to different second motion control parameters. Specifically, a correspondence relationship among the movement characteristic parameters, the first motion control parameters and the second motion control parameters can be established in advance, and the correspondence relationship can be in the form of a mapping relationship, a calculation relationship, etc. Based on the correspondence relationship, the second motion control parameter that keeps the diaphragm in the laminating machine in a tensioned state can be determined based on the movement characteristic parameters and the second motion control parameters.

[0128] In this embodiment, the movement coordination of the material storage module, the film pulling roller group and the stacking table can effectively improve the accuracy of diaphragm tension control, effectively reduce the fluctuation of diaphragm tension, and further prevent the diaphragm in the battery gasket machine from loosening.

[0129] In addition, an embodiment of the present invention further proposes a computer-readable storage medium, on which a control program of a stacking machine is stored. When the control program of the stacking machine is executed by a processor, the relevant steps of any embodiment of the diaphragm tension control method of the stacking machine are implemented.

[0130] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0131] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0132] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes a number of instructions for a terminal device (which can be a mobile phone, computer, server, laminating machine, or network device, etc.) to execute the methods described in each embodiment of the present invention.

[0133] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for controlling the diaphragm tension of a laminating machine, characterized in that: The laminating machine comprises a feeding device, a film-drawing roller group, and a laminating table arranged below the film-drawing roller group. The diaphragm tension control method of the laminating machine comprises the following steps: Controlling the film-drawing roller group to move so as to lay the diaphragm provided by the feeding device on the laminating table; the step of controlling the film-drawing roller group to move comprises: controlling the film-drawing roller group to move from a first position toward a second position, wherein the first position and the second position are both located above the laminating table and are spaced apart; During the movement of the film-drawing roller group, obtaining the movement time of the film-drawing roller group, wherein the movement time is counted from when the film-drawing roller group is located at the first position; During the movement of the film-drawing roller group, a first motion control parameter of the laminating platform is determined according to the movement time of the film-drawing roller group, wherein the first motion control parameter includes a displacement control parameter of the laminating platform and / or an acceleration control parameter of the laminating platform; The movement of the lamination table is controlled according to the first motion control parameter so that the diaphragm in the lamination machine is maintained in a tensioned state.

2. The diaphragm tension control method of a laminating machine according to claim 1, characterized in that: The step of determining the displacement control parameter of the lamination table according to the movement time comprises: When the moving time is less than a first set time threshold, determining the displacement control parameter as the lamination table moving away from the film-drawing roller group along a first direction; When the moving time is greater than or equal to the first set time threshold, the displacement control parameter is determined as the lamination table moving along the second direction toward the film drawing roller group.

3. The diaphragm tension control method of a laminating machine according to claim 2, characterized in that: The first direction is downward or the first direction is opposite to the moving direction of the film-drawing roller group; And / or, the first direction is opposite to the second direction.

4. The diaphragm tension control method of a laminating machine according to claim 2, characterized in that: The step of determining the displacement control parameter of the lamination table according to the movement time also includes: If the laminating table is located at the reference position when the film-drawing roller group is located at the first position, then when the moving time is less than the first set time threshold and greater than or equal to the second set time threshold, the step of determining the displacement control parameter is that the laminating table moves away from the film-drawing roller group along the first direction is performed; when the moving time is less than the second set time threshold, the displacement control parameter is determined that the laminating table maintains the reference position; Wherein, the reference position is the position where the diaphragm in the stacking machine is in a tensioned state when the film-drawing roller group is located at the first position, and the second set time threshold is less than the first set time threshold.

5. The diaphragm tension control method of a laminating machine according to claim 2, characterized in that: When the moving time is greater than or equal to the first set time threshold, the step of determining the displacement control parameter is performed before or after the step of the laminating table moving along the second direction toward the film-drawing roller group, and the step of determining the acceleration control parameter of the laminating table according to the moving time includes: When the moving time is greater than or equal to the first set time threshold and less than a third set time threshold, determining the first acceleration as the acceleration control parameter; When the moving time is greater than or equal to the third set time threshold, determining the second acceleration as the acceleration control parameter; The directions of the first acceleration and the second acceleration are both the same as the second direction, the first acceleration is smaller than the second acceleration, and the third set time threshold is larger than the first set time threshold.

6. The diaphragm tension control method of a laminating machine according to claim 2, characterized in that: When the moving time is less than the first set time threshold, the step of determining the displacement control parameter for the laminating table to move away from the film-drawing roller group along the first direction is performed simultaneously with or after the step of performing the displacement control parameter, and the step of determining the acceleration control parameter of the laminating table according to the moving time includes: When the moving time is less than the first set time threshold and greater than or equal to the fourth set time threshold, determining the third acceleration as the acceleration control parameter; When the moving time is less than the fourth set time threshold, determining a fourth acceleration as the acceleration control parameter; The direction of the third acceleration is opposite to the first direction, and the direction of the fourth acceleration is the same as the first direction.

7. The diaphragm tension control method of a laminating machine according to any one of claims 1 to 6, characterized in that: The feeding device includes an unwinding module and a storage module, and the storage module is used to compensate the expansion and contraction amount of the diaphragm between the unwinding module and the film drawing roller group through movement. The diaphragm tension control method of the laminating machine also includes: Controlling the unwinding module to release the diaphragm and executing the step of controlling the film drawing roller group to move so as to lay the diaphragm provided by the feeding device on the laminating table; After the step of determining the first motion control parameter of the laminating table according to the moving time of the film-drawing roller group during the movement of the film-drawing roller group, the method further includes: Determining a second motion control parameter of the storage module according to the movement time and the first motion control parameter; The movement of the storage module is controlled according to the second motion control parameter so that the diaphragm in the stacking machine is maintained in a tensioned state.

8. A lamination machine, characterized in that: The lamination machine comprises: Feeding device; Film drawing roller set; A lamination platform, the lamination platform is arranged below the film drawing roller group; A control device, wherein the feeding device, the film-drawing roller group and the stacking table are all connected to the control device, and the control device comprises: a memory, a processor and a control program of the stacking machine stored in the memory and executable on the processor, wherein the control program of the stacking machine, when executed by the processor, implements the steps of the diaphragm tension control method of the stacking machine as described in any one of claims 1 to 7.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a control program of the stacking machine, and when the control program of the stacking machine is executed by the processor, the steps of the diaphragm tension control method of the stacking machine according to any one of claims 1 to 7 are implemented.

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