Pressure control method, device, equipment, machine table, system, medium and product

Abstract

The invention provides a pressure control method, device and equipment, a machine table, a system, a medium and a product. The method comprises the following steps: acquiring a target pressing force and an approaching position of a to-be-pressed target object; controlling an execution mechanism to move to the approaching position at a first movement speed; and the execution mechanism is controlled to move at a second movement speed until the pressing force applied to the target object by the execution mechanism reaches the target pressing force, and the second movement speed is smaller than the first movement speed. According to the method, the efficiency of the pressure impact test can be improved.

Description

Technical Field

[0001] The present application relates to pressure shock testing technology, and in particular to a pressure control method, device, equipment, machine, system, medium and product. Background Art

[0002] The power source of electric vehicles mainly depends on batteries. Batteries are usually composed of multiple cells. At present, during the production process of battery cells, they are subjected to high-voltage shock tests through pressure shock testing machines to verify the performance of the produced battery cells.

[0003] Specifically, the pressure shock test machine is provided with a clamping position corresponding to the target clamping force. When the pressure shock test machine needs to perform a high-voltage shock test on the battery cell, its actuator is controlled to move to the clamping position at a relatively low speed to apply the target clamping force to the battery cell. Subsequently, the battery cell can be short-circuited while the large surface of the battery cell is clamped to obtain the test results of the battery cell's performance.

[0004] However, the method in which the above-mentioned pressure shock test machine applies the target pressing force to the battery cell results in low efficiency of the high voltage shock test. Summary of the invention

[0005] The present application provides a pressure control method, device, equipment, machine, system, medium and product to solve the problem of low efficiency of high-voltage impact testing.

[0006] In a first aspect, the present application provides a pressure control method, the method comprising:

[0007] Obtaining a target pressing force and an approach position of a target object to be pressed;

[0008] Controlling the actuator to move to the approach position at a first movement speed;

[0009] The actuator is controlled to move at a second movement speed until the pressing force applied by the actuator to the target object reaches a target pressing force, and the second movement speed is less than the first movement speed.

[0010] Optionally, the controlling the actuator to move to the approach position at a first movement speed comprises:

[0011] In the positioning mode, controlling the actuator to move to the approach position at a first movement speed;

[0012] The controlling the actuator to move at a second movement speed comprises:

[0013] Switching from the positioning mode to the inching mode;

[0014] In the jog mode, the actuator is controlled to move at a second movement speed.

[0015] Optionally, before the control actuator moves to the approach position at the first movement speed, the method further includes:

[0016] receiving a close position setting instruction, wherein the close position setting instruction includes: a pressing force interval corresponding to the close position;

[0017] Determining an initial approach position according to the clamping force range, and controlling the actuator to move to the initial approach position at a third movement speed;

[0018] According to the pressure value applied by the actuator to the target object at the initial approach position and the pressing force range, fine-tuning the initial approach position of the actuator to obtain the approach position;

[0019] The approach position is stored.

[0020] Optionally, the step of fine-tuning the initial approach position of the actuator according to the pressure value applied by the actuator to the target object at the initial approach position and the pressing force interval to obtain the approach position includes:

[0021] When the pressure value corresponding to the initial approach position is less than the lower limit value of the pressing force range, the initial approach position is moved in the pressing direction by a first distance to obtain the approach position;

[0022] When the pressure value corresponding to the initial approach position is greater than the upper limit value of the pressing force range, the initial approach position is moved a second distance away from the pressing direction to obtain the approach position.

[0023] Optionally, the controlling the actuator to move to the initial approach position at a first movement speed comprises:

[0024] In the positioning mode, controlling the actuator to move to the initial approach position at a third movement speed;

[0025] The step of fine-tuning the initial approach position of the actuator according to the pressure value applied by the actuator to the target object at the initial approach position and the pressing force interval includes:

[0026] Switching from the positioning mode to the inching mode;

[0027] In the inching mode, the initial approach position of the actuator is fine-tuned according to the pressure value applied by the actuator to the target object at the initial approach position and the pressing force range.

[0028] Optionally, the method further comprises:

[0029] Acquire a pressure value applied by the actuator to the target object at the approach position;

[0030] When the pressure value applied by the actuator to the target object at the approach position is less than the lower limit of the clamping force range, the stored approach position is updated to a first approach position, where the first approach position is a position obtained by moving the approach position in a clamping direction by a third distance;

[0031] When the pressure value corresponding to the approach position is greater than the upper limit value of the pressing force range, the stored approach position is updated to a second approach position, where the second approach position is a position obtained by moving the approach position away from the pressing direction by a fourth distance.

[0032] Optionally, the method further comprises:

[0033] When the pressing force applied by the actuator to the target object reaches a target pressing force, obtaining a torque corresponding to the pressing force applied by the actuator to the target object;

[0034] Determining whether a pressure sensor for collecting the pressing force in the actuator needs to be calibrated according to the target pressing force and the corresponding torque;

[0035] In the case where the pressure sensor is calibrated abnormally, a prompt message is output, where the prompt message is used to prompt the pressure sensor to be recalibrated.

[0036] Optionally, determining whether a pressure sensor for collecting the pressing force in the actuator needs to be calibrated according to the pressing force and the corresponding torque includes:

[0037] Obtaining a ratio of the pressing force to the corresponding torque;

[0038] When the ratio is not within the preset ratio interval, it is determined that the pressure sensor needs to be calibrated.

[0039] Optionally, controlling the actuator to move at a second movement speed until the pressing force applied by the actuator to the target object reaches a target pressing force includes:

[0040] During the process of controlling the actuator to move at the second movement speed, detecting whether the pressure sensor fails;

[0041] If the pressure sensor fails, the actuator is controlled to move at a second movement speed until the torque reaches a target torque corresponding to the target pressing force.

[0042] In a second aspect, the present application provides a pressure control device, the device comprising:

[0043] An acquisition module, used to acquire a target pressing force and a close position of a target object to be pressed;

[0044] The control module is used to control the actuator to move to the approach position at a first movement speed, and to control the actuator to move at a second movement speed until the pressing force applied by the actuator to the target object reaches a target pressing force, and the second movement speed is less than the first movement speed.

[0045] In a third aspect, the present application provides an electronic device, the electronic device comprising: a processor, and a memory communicatively connected to the processor;

[0046] The memory stores computer-executable instructions;

[0047] The processor executes the computer-executable instructions stored in the memory to implement the method as described in any one of the first aspects.

[0048] In a fourth aspect, the present application provides a pressure shock testing machine, which is used to execute the method as described in any one of the first aspects.

[0049] In a fifth aspect, the present application provides a testing system, the testing system comprising: a testing device, and a pressure shock testing machine;

[0050] The pressure shock testing machine is used to perform a compression process on the target object using the method described in any one of the first aspects;

[0051] The test subsystem is used to test the performance of the target object after the compaction process, and obtain and output the test result of the target object; the test result is used to indicate whether the performance test of the target object has passed.

[0052] Optionally, the target object is a battery cell;

[0053] The test subsystem is specifically used to perform short circuit detection on the battery cell after the compaction process to obtain the test result of the battery cell.

[0054] In a sixth aspect, the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, they are used to implement the method as described in any one of the first aspects.

[0055] In a seventh aspect, the present application provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the method described in any one of the first aspects is implemented.

[0056] The pressure control method, device, equipment, machine, system, medium and product provided by the present application can first quickly move to a position close to the position of the target pressing force when the target object is pressed, and then run to the position of the target pressing force at a lower speed to complete the pressure control of the pressure surface of the target object, thereby improving the movement speed of the actuator and improving the efficiency of the pressing process. When the pressing process is applied to the efficiency of the pressure shock test, the efficiency of the pressure shock test can be further improved, thereby improving the production efficiency of the target object and ensuring the production rhythm. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0058] Figure 1 A schematic diagram of the structure of a pressure shock testing machine provided in an embodiment of the present application;

[0059] Figure 2 A schematic diagram of the structure of an actuator provided in an embodiment of the present application;

[0060] Figure 3 A schematic flow chart of a pressure control method provided in an embodiment of the present application;

[0061] Figure 4 A flow chart of a method for setting a proximity position provided in an embodiment of the present application;

[0062] Figure 5 A schematic flow chart of a method for adjusting an approach position provided in an embodiment of the present application;

[0063] Figure 6 A schematic diagram of the structure of a pressure control device provided in an embodiment of the present application;

[0064] Figure 7 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0065] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments.

[0066] Reference numerals:

[0067] 11-control device; 12-driving device; 13-pressure sensor; 14-actuator; 15-human-machine interaction component;

[0068] 141-motor; 142-electric cylinder; 143-push plate; 144-pressing plate. DETAILED DESCRIPTION

[0069] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0070] Figure 1 A schematic diagram of the structure of a pressure shock test machine provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, the pressure shock testing machine includes: a control device 11, a driving device 12, a pressure sensor 13, an actuator 14, and a human-computer interaction component 15.

[0071] The control device 11 is respectively connected to the drive device 12 and the pressure sensor 13 in communication, and the drive device 12 is connected to the actuator 14 in communication. For example, the above devices can be connected to each other in communication via a communication method supported by the Ethernet for Control Automation Technology (E-CAT) protocol.

[0072] The control device 11 may be, for example, a programmable logic controller (PLC), a single-chip microcomputer, a system on chip (SoC), or any other device having a control function.

[0073] The actuator 14 is any mechanism capable of applying a pressing force to the target object to be tested. Figure 2 This is a schematic diagram of the structure of an actuator 14 provided in an embodiment of the present application. Figure 2 As shown, the actuator 14 may include, for example: a motor 141 , an electric cylinder 142 , a push plate 143 and at least one set of pressure plates 144 .

[0074] The front end of the electric cylinder 142 is fixed with a push plate 143, and the rear end is fixed with a motor 141, and the push plate 143 is mechanically connected with a pressing plate 144. A station for placing a target object is arranged between a group of pressing plates 144.

[0075] The electric cylinder 142 is an actuator 14 that converts electrical energy into high thrust and high-precision linear motion. The push plate 143 is a mechanical component used to apply force or push an object to achieve the movement or position adjustment of the object. The pressure plate 144 is a mechanical component used to apply pressure or fix an object, and is used in operations such as clamping, fixing and pressing. Therefore, the motor 141 in the actuator 14 drives the electric cylinder 142 forward or backward by rotating, so that the electric cylinder 142 pushes the push plate 143 forward or backward, and the pressure plate 144 cooperates with the push plate 143 to move forward or backward.

[0076] The pressure sensor 13 is located between the push plate 143 and the electric cylinder 142 and is used to detect the pressing force applied to the target object.

[0077] The driving device 12 may be, for example, any device capable of providing power to the actuator 14, and the type of the driving device 12 is related to the type of the motor that needs to provide power in the actuator 14. For example, if the motor 141 in the actuator 14 is a servo motor, the driving device 12 may be, for example, a servo driver.

[0078] The servo motor 141 is an electric motor used to precisely control angle, position, speed and torque. The servo driver is an electronic device used to control the servo motor. Its main function is to receive the command signal from the control system and convert it into the current and voltage required by the servo motor, thereby precisely controlling the speed, position and torque of the servo motor 141.

[0079] The human-machine interaction component 15 may be, for example, any component with input and display functions. For example, the human-machine interaction component 15 may be a touch screen with a human-machine interface (HMI), or the human-machine interaction component 15 may include a display screen and an input device. The input device mentioned here may include, for example, a keyboard and a mouse.

[0080] The human-computer interaction component 15 can be used to receive the user's setting parameters, and can also display some operating process data of the current pressure shock test machine during operation, including but not limited to the test object and the parameters used.

[0081] It should be understood that the above-mentioned HMI is an interactive interface between an operator and an automation system. The HMI can provide information display, control operations and data input through a graphical interface to help operators effectively monitor and control equipment.

[0082] The pressure shock test machine can be used, for example, to perform a high voltage shock test on a battery cell. Currently, the pressure shock test machine mainly uses the following methods to perform a high voltage shock test on a battery cell:

[0083] Before testing a batch of battery cells, one of the battery cells may be placed at a work station, and the pressing position of the batch of battery cells may be set in the following manner.

[0084] (1) The operator sets the target pressing force required for the battery cell through the human-machine interaction component 15.

[0085] (2) The control device 11 generates a motion command according to the target pressing force and sends it to the driving device 12 .

[0086] (3) The driving device 12 converts the motion command into a driving signal of the motor 141 to control the movement of the motor 141.

[0087] (4) The motor 141 controls the movement of the electric cylinder 142, and the electric cylinder 142 drives the pressing plate 144 to apply a pressing force to the battery cell.

[0088] (5) The pressure sensor 13 feeds back the collected pressure value to the control device 11. The pressure value is used to detect the pressing force applied by the pressure shock test machine to the battery cell. In some embodiments, the pressure value and the pressing force are equal, which is not limited in this embodiment.

[0089] (6) When the pressure value reaches the target pressing force, the control device 11 sends a stop command to the driving device 12 so that the driving device 12 stops the driving motor 141 from moving.

[0090] (7) The motor 141 fixes the pressing position and feeds back the pressing position data to the control device 11.

[0091] The above operation can be performed in the positioning mode. Taking the servo motor as an example, in the positioning mode, the position to be moved by the servo motor can be set, and then the rising edge of the servo start signal is triggered, and the servo motor stops after running to the set position.

[0092] Through the above settings, when a high-voltage impact test is subsequently performed on the remaining battery cells in the batch, the clamping position data can be used in the positioning mode to control the actuator 14 to run uniformly at a lower speed to the clamping position, so that the clamping force applied by the actuator 14 to the battery cells reaches the target clamping force.

[0093] However, the way in which the pressure shock test machine applies the target clamping force to the battery cell causes the actuator 14 to move slowly, resulting in low efficiency of the high-voltage shock test, and further resulting in low production efficiency of the battery cell, making it difficult to achieve the production rhythm of the battery cell.

[0094] In view of this, the embodiment of the present application provides a pressure control method, and the pressure shock test machine can first quickly move to a position close to the position of the target pressing force when performing a pressing process on the target object, and then run to the position of the target pressing force at a lower speed to complete the pressure control of the pressure surface of the target object. Compared with the method of running to the position of the target pressing force at a lower speed throughout the process in the prior art, the embodiment of the present application can improve the efficiency of the pressing process.

[0095] It should be understood that the target object can be any device or component that needs to be pressed, such as the battery cell mentioned above. It should be understood that when the pressing process of the embodiment of the present application is applied to the pressure shock test scenario, the efficiency of the pressure shock test can also be improved.

[0096] The execution subject of the embodiment of the present application may be any device that can apply a clamping force to a target object. The specific structure of the device is related to the application scenario of applying the clamping force. For example, it may be the pressure shock testing machine mentioned above.

[0097] Taking the pressure shock test machine as an example, the specific embodiments of the present application will be described in detail on the technical solution of the present application and how the technical solution of the present application solves the above technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0098] Figure 3 A flow chart of a pressure control method provided in an embodiment of the present application is shown in FIG. Figure 3 As shown, the execution subject of the method may be, for example, the control device 11 in the aforementioned pressure shock test machine, and the method may include the following steps:

[0099] S301 : Obtain a target pressing force and a proximity position of a target object to be pressed.

[0100] The target clamping force is the clamping force applied to the target object to achieve the pressure value required for the target object. The approach position is a position close to but not yet at the target clamping force. The approach position may be, for example, a position closest to the target position corresponding to the target clamping force and at a position where the movement speed of the actuator 14 will not have an impact on the target object. This embodiment does not limit the approach position, and the form of expression of the position mentioned later, which may be a relative position relative to the starting point, or an absolute position, and may be represented by coordinates, distances, or directly represented by the corresponding clamping force, etc.

[0101] The target clamping force and approach position may be pre-set in the pressure shock test machine. Therefore, the control device 11 may obtain the target clamping force and approach position from the pre-stored setting data. Alternatively, the target clamping force and approach position may be input by the staff through the human-computer interaction component 15.

[0102] S302, controlling the actuator to move to the approach position at a first movement speed.

[0103] The first movement speed is the speed at which the actuator 14 moves from the initial position to the approach position. The first movement speed is a relatively fast speed. The initial position is the position of the actuator 14 when no execution instruction is received. The relatively fast speed here means that the first movement speed is higher than the speed used in the prior art.

[0104] Regarding how to control the actuator 14 to move to the approach position at the first movement speed, reference may be made to the description of how to control the actuator 14 in a pressure shock testing machine in the prior art.

[0105] S303, controlling the actuator to move at a second movement speed until the pressing force applied by the actuator to the target object reaches a target pressing force, and the second movement speed is less than the first movement speed.

[0106] The second movement speed is the speed at which the actuator 14 moves from the approach position to the target clamping force. The second movement speed is less than the first movement speed. Exemplarily, the second movement speed may be consistent with the speed used in the prior art.

[0107] For example, when the control device 11 controls the actuator 14 to move at the second speed, it can identify that the pressing force applied by the actuator 14 to the target object reaches the target pressing force based on the pressure value fed back by the pressure sensor 13, and when the target pressing force is reached, the actuator 14 can be controlled to stop moving. It should be understood that how to control the actuator 14 to move at the second speed can refer to the description of how to control the actuator 14 to move in the pressure shock test machine in the prior art.

[0108] That is, after controlling the actuator 14 to move to the approach position at a faster speed, the actuator 14 is controlled to move to the position where the target clamping force is located at a lower speed. In this way, the moving speed of the actuator 14 can be increased without affecting the pressure on the target object due to the increased moving speed.

[0109] At this point, the pressure control on the pressure surface of the target object is completed.

[0110] This embodiment does not limit the implementation of the above-mentioned control of the actuator 14 to move to the approach position at the first movement speed, and the control of the actuator 14 to move at the second movement speed. For example, the actuator 14 can be operated to different positions at two different speeds in the positioning mode by changing the positioning mode. For another example, the actuator 14 can be controlled to move to the approach position at the first movement speed in the current positioning mode, and then, after switching from the positioning mode to the jog mode, the actuator 14 can be controlled to move at the second movement speed in the jog mode.

[0111] Taking the servo motor as an example, the inching mode refers to a mode in which the servo motor is controlled by the inching forward and reverse signals, and the forward and reverse signals are continuous signals. Once disconnected, the servo motor stops moving, and when triggered again, the servo motor starts again, so that the actuator 14 can achieve a smaller movement.

[0112] The pressure control method provided in the embodiment of the present application can first quickly move to a position close to the position of the target pressing force when the target object is pressed, and then run to the position of the target pressing force at a lower speed to complete the pressure control of the pressure surface of the target object. The movement speed of the actuator 14 is increased, thereby improving the efficiency of the pressing process. When the pressing process is applied to the efficiency of the pressure shock test, the efficiency of the pressure shock test can be further improved, thereby improving the production efficiency of the target object and ensuring the production rhythm.

[0113] The approach position used in the above pressure control method can be manually set in advance by the staff, that is, the staff can input the approach position through the human-computer interaction component 15 to achieve the setting of the approach position. Alternatively, the approach position can be automatically set in the following manner. The following describes how to achieve the automatic setting:

[0114] Before testing a batch of target objects, one of the target objects may be placed at a workstation, and the approach position of the batch of target objects may be set in the following manner. Figure 4 A flow chart of a method for setting a proximity position provided in an embodiment of the present application. Figure 4 As shown, before the above step S301, the method may include the following steps:

[0115] S401, receiving an approach position setting instruction, where the approach position setting instruction includes: a pressing force interval corresponding to the approach position.

[0116] The pressing force interval corresponding to the approach position is used to characterize the position range of the approach position. The specific value of the pressing force interval can be set according to actual experience, or obtained through offline calibration.

[0117] For example, the staff can input the clamping force interval corresponding to the approach position on the human-computer interaction component 15, or the pressure shock test machine is provided with a plurality of candidate clamping force intervals, and the staff can obtain the clamping force interval used this time by selection.

[0118] S402: Determine an initial approach position according to the clamping force range, and control the actuator to move to the initial approach position at a third movement speed.

[0119] The initial approach position may be, for example, a position corresponding to the midpoint value of the pressing force interval. The third movement speed may be consistent with the first movement speed or may be different, and this is not limited.

[0120] It should be understood that how to control the actuator 14 to move to the initial approach position at the third movement speed can refer to the description of how to control the movement of the actuator 14 in a pressure shock testing machine in the prior art.

[0121] S403 , fine-tuning the initial approach position of the actuator according to the pressure value applied by the actuator on the target object at the initial approach position and the pressing force range to obtain the approach position.

[0122] In one possible implementation, when the pressure value corresponding to the initial approach position is less than the lower limit value of the clamping force interval, the initial approach position is moved in the clamping direction by a first distance to obtain an approach position, so that the clamping force applied by the actuator 14 to the target object at the approach position is within the clamping force interval. The first distance can be specifically set according to the initial approach position and the clamping force interval. For example, it can be the difference between the initial approach position and the lower limit value of the clamping force interval, or it can be the difference between the initial approach position and the midpoint value of the clamping force interval.

[0123] When the pressure value corresponding to the initial approach position is greater than the upper limit of the clamping force interval, the initial approach position is moved a second distance away from the clamping direction to obtain an approach position; wherein the first distance is less than the second distance, so that the clamping force applied by the actuator 14 to the target object at the approach position is within the clamping force interval. The second distance can be specifically set according to the initial approach position and the clamping force interval. For example, it can be the difference between the initial approach position and the upper limit of the clamping force interval, or it can be the difference between the initial approach position and the midpoint value of the clamping force interval.

[0124] When the initial approach position is within the clamping force range, no adjustment is required. Alternatively, the initial approach position is fine-tuned according to the midpoint of the clamping force range to adjust to a position corresponding to the midpoint value, and this is not limited.

[0125] This embodiment does not limit the above-mentioned control of the actuator 14 to move to the initial approach position at the third movement speed, and the implementation method of fine-tuning the initial approach position of the actuator 14 to obtain the approach position. For example, the actuator 14 can be operated to different positions at two different speeds in the positioning mode by changing the positioning mode. For another example, the actuator 14 can be controlled to move to the initial approach position at the third movement speed in the current positioning mode, and then, after switching from the positioning mode to the inching mode, the initial approach position of the actuator 14 can be fine-tuned in the inching mode.

[0126] S404: Store the approach position.

[0127] After the approach position is stored, the approach position can be directly used to control the clamping force of the batch of target objects in the following manner. Figure 3 Operate in the manner shown.

[0128] This completes the setting of the approach position.

[0129] It should be understood that the setting of the approach position and the setting of the target clamping force can be implemented in the same setting process or in two independent setting processes. For example, the staff can input the clamping force range and the target clamping force through the human-computer interaction component 15, thereby Figure 4 After obtaining the approach position suitable for the batch of target objects, the process shown in the figure stores the approach position and the target pressing force, so that the aforementioned method can be used for the batch of target objects. Figure 3 The method flow shown is for compaction processing.

[0130] The approach position setting method provided in the embodiment of the present application can accurately obtain the approach position suitable for the target object based on the clamping force range and the actual situation of the target object, thereby improving the accuracy of the approach position setting and reducing or avoiding the impact of the clamping process on the target object. The implementation of this process does not need to rely on the experience of the staff. Even inexperienced staff can accurately set the approach position through the above method, reducing the difficulty of operation.

[0131] The above is an explanation of the setting of the approach position of the target object. In addition, the method of the embodiment of the present application can also automatically fine-tune the approach position according to the changes of the target object during the actual operation. For example, after the compaction process of a batch of target objects is completed, when the compaction process of the next batch of target objects is performed, the approach position can be automatically adjusted by the following method, without the need for the staff to set the approach position by setting, thereby improving the efficiency of the compaction process and thus improving the production efficiency.

[0132] Figure 5A schematic flow chart of a method for adjusting the approach position provided in an embodiment of the present application. Figure 5 As shown, after the above step S302, the method may further include:

[0133] S501 , obtaining a pressure value applied by an actuator to a target object at a proximity position.

[0134] That is, during the actual pressing process on the target object, the control device 11 obtains the pressure value collected by the pressure sensor 13 and applied by the actuator 14 to the target object at the approach position, and the pressure value represents the pressing force applied by the actuator 14 to the target object at the approach position.

[0135] S502: When the pressure value applied by the actuator on the target object at the approach position is less than the lower limit of the clamping force range, the stored approach position is updated to a first approach position, where the first approach position is a position obtained by moving the approach position in the clamping direction by a third distance.

[0136] S503: When the pressure value corresponding to the approach position is greater than the upper limit of the clamping force range, the stored approach position is updated to a second approach position, where the second approach position is a position obtained by moving the approach position away from the clamping direction by a fourth distance.

[0137] For the implementation of the above steps S502 and S503, please refer to the description of the above step S403, which will not be repeated here. Different from the above setting process, the update in this embodiment only updates the stored approach position according to the relationship between the above pressure value and the clamping force range, and does not actually adjust the approach position of the target object currently being clamped. In some embodiments, the approach position of the target object currently being clamped can also be adjusted, which is not limited to this, and the processing method can be determined according to actual needs.

[0138] S504: Store the new approach position.

[0139] This completes the automatic fine-tuning of the approach position when the target object changes.

[0140] The updating method of the approach position provided in the embodiment of the present application can automatically and accurately obtain the approach position adapted to the target object based on the clamping force interval and the actual situation of the target object when the target object changes. That is, the approach position setting value can be automatically corrected according to the pressure change to adapt to target objects of different thicknesses, thereby improving the accuracy and automation of the approach position setting, and further improving the test efficiency and production efficiency of the target object.

[0141] As mentioned in the above embodiment, the pressure value collected by the pressure sensor 13 is used to control the actuator 14 during the compaction process. Whether the pressure value collected by the pressure sensor 13 is valid determines the accuracy of the subsequent control. Therefore, based on the above embodiment, this embodiment can also judge the effectiveness of the pressure sensor 13 during the compaction process. For example, it may include the following contents:

[0142] Part 1: Detect whether the pressure sensor 13 needs to be calibrated.

[0143] When the pressing force applied by the actuator 14 to the target object reaches the target pressing force, that is, after step S303, the control device 11 can obtain the torque corresponding to the pressing force applied by the actuator 14 to the target object. Figure 2 Taking the actuator 14 shown as an example, the torque may be the torque of the motor 141 .

[0144] It should be understood that the torque mentioned here is not the torque in the mechanical sense, but a value related to current or voltage, which is positively correlated with the torque. That is, the greater the current or voltage, the greater the torque value.

[0145] Therefore, it is possible to judge whether the pressure sensor 13 needs to be calibrated by the torque and the target clamping force. In the case where it is determined that the pressure sensor 13 needs to be calibrated, a prompt message for prompting the pressure sensor 13 to be recalibrated can be output, so that the staff can calibrate the pressure sensor 13 in time and ensure the accuracy of subsequent control. For example, the prompt message can be displayed on the display interface of the human-computer interaction component 15, or the human-computer interaction component 15 can also be provided with a voice broadcast device, so that the prompt message can be voice broadcasted through the voice broadcast device, or the human-computer interaction component 15 can also be provided with an acousto-optic device, so that the prompt message can be fed back through the color displayed by the acousto-optic device, or the brightness, or the indicator light, or the human-computer interaction component 15 can also output the prompt message in the above-mentioned combination, or the control device 11 can also send it to the host computer used to control the pressure shock test machine through the communication module, so as to output the prompt message through the host computer.

[0146] The above-mentioned output prompt information prompting the staff to calibrate can be applicable to the scenario of calibrating the pressure sensor 13 using any calibration method, such as manual calibration, mechanical calibration, software calibration, etc.

[0147] Optionally, for the pressure sensor 13 that can be calibrated by software, the embodiment of the present application can also perform calibration processing on the pressure sensor 13 through a pre-stored calibration program when it is determined that the pressure sensor 13 needs to be calibrated, so as to ensure the accuracy of subsequent control.

[0148] The following describes how to determine whether the pressure sensor 13 needs to be calibrated based on the torque and the target clamping force:

[0149] For example, a mapping relationship between clamping force and torque may be preset in the control device 11. Therefore, the control device 11 can obtain the clamping force corresponding to the torque through the mapping relationship. If the clamping force corresponding to the torque is inconsistent with the target clamping force, or the difference is greater than a set threshold, it is determined that the pressure sensor 13 needs to be calibrated.

[0150] For another example, the control device 11 may be preset with a ratio interval. Therefore, the control device 11 may determine whether the pressure sensor 13 needs to be calibrated based on the relationship between the ratio i of the target clamping force and the torque and the ratio interval. For example, if the ratio is not within the preset ratio interval, it is determined that the pressure sensor 13 needs to be calibrated.

[0151] The above ratio range can be obtained, for example, by offline actual measurement, or can be set according to historical experience. Taking the target object as a battery cell as an example, the above ratio range can be, for example, [59, 61].

[0152] When the i value is greater than the upper limit of the ratio interval, it means that the pressure value collected by the pressure sensor 13 is larger than the normal value. When the i value is less than the lower limit of the ratio interval, it means that the clamping force collected by the pressure sensor 13 is smaller than the normal value, or the torque is larger than the normal value. In the above two cases, the pressure sensor 13 can be calibrated first.

[0153] In the case where the i value is less than the lower limit of the ratio interval, after calibrating it in the above manner, if the i value obtained by the control device 11 based on the above process is again less than the lower limit of the ratio interval, it means that the torque is larger than the normal value, and this problem may be caused by wear of mechanical parts or poor lubrication. Therefore, in this case, the ratio interval can be readjusted according to the i value to avoid the situation where the output prompt information is triggered by mistake.

[0154] Part 2: Detect whether the pressure sensor 13 fails.

[0155] In the process of controlling the actuator 14 to move at the second movement speed, that is, in the process of executing step S303, the control device 11 can detect whether the pressure sensor 13 fails. That is, the control device 11 can determine whether it fails by whether the pressure value collected by the pressure sensor 13 can be obtained. When the control device 11 cannot obtain the pressure value collected by the pressure sensor 13, it is determined that the pressure sensor 13 fails. The acquisition mentioned here can be that the control device 11 cannot read the pressure value from the pressure sensor 13 side, or the pressure sensor 13 does not report the pressure value to the control device 11.

[0156] If the pressure sensor 13 fails, the control device 11 can control the actuator 14 based on the torque to move the actuator 14 to the target position corresponding to the target clamping force. That is, the control device 11 controls the actuator 14 to move at the second movement speed until the torque reaches the target torque corresponding to the target clamping force.

[0157] Through the above-mentioned method, even if the pressure sensor 13 fails, the execution and accuracy of the pressing process can still be ensured, and the target object will not be damaged due to excessive pressing force applied to the target object due to the failure of the pressure sensor 13.

[0158] The above is an explanation and introduction of the method embodiment of the present application. The following is an explanation and introduction of the device of the embodiment of the present application.

[0159] Figure 6 A schematic diagram of the structure of a pressure control device provided in an embodiment of the present application is shown in FIG. Figure 6 As shown, the device includes: an acquisition module 601 and a control module 602. Optionally, the device may also include a receiving module 603, for example.

[0160] An acquisition module 601 is used to acquire a target pressing force and a close position of a target object to be pressed;

[0161] The control module 602 is used to control the actuator 14 to move to the approach position at a first movement speed, and to control the actuator 14 to move at a second movement speed until the clamping force applied by the actuator 14 to the target object reaches a target clamping force, and the second movement speed is less than the first movement speed.

[0162] Optionally, the control module 602 is specifically used to control the actuator 14 to move to the approach position at a first movement speed in the positioning mode; switch from the positioning mode to the jog mode; in the jog mode, control the actuator 14 to move at a second movement speed.

[0163] Optionally, the receiving module 603 is used to receive an approach position setting instruction before the control module 602 controls the actuator 14 to move to the approach position at the first movement speed, and the approach position setting instruction includes: a pressing force interval corresponding to the approach position.

[0164] In this implementation, the control module 602 is also used to determine the initial approach position based on the clamping force range, and control the actuator 14 to move to the initial approach position at a third movement speed; fine-tune the initial approach position of the actuator 14 according to the pressure value applied by the actuator 14 to the target object at the initial approach position, and the clamping force range, to obtain the approach position; and store the approach position.

[0165] For example, control module 602 is specifically used to move the initial approach position in the clamping direction by a first distance to obtain the approach position when the pressure value corresponding to the initial approach position is less than the lower limit value of the clamping force interval; and to move the initial approach position away from the clamping direction by a second distance to obtain the approach position when the pressure value corresponding to the initial approach position is greater than the upper limit value of the clamping force interval.

[0166] For example, the control module 602 is specifically used to control the actuator 14 to move to the initial approach position at a third movement speed in the positioning mode; switch from the positioning mode to the jog mode; in the jog mode, fine-tune the initial approach position of the actuator 14 according to the pressure value applied by the actuator 14 to the target object in the initial approach position, and the clamping force range.

[0167] Optionally, the acquisition module 601 is further used to acquire the pressure value applied by the actuator 14 to the target object at the approach position. The control module 602 is further used to update the stored approach position to a first approach position when the pressure value applied by the actuator 14 to the target object at the approach position is less than the lower limit of the clamping force interval, and to update the stored approach position to a second approach position when the pressure value corresponding to the approach position is greater than the upper limit of the clamping force interval, and the second approach position is a position obtained by moving the approach position away from the clamping direction by a fourth distance.

[0168] Optionally, the acquisition module 601 is also used to acquire the torque corresponding to the clamping force applied by the actuator 14 to the target object when the clamping force applied by the actuator 14 to the target object reaches the target clamping force. The control module 602 is also used to determine whether the pressure sensor 13 used to collect the clamping force in the actuator 14 needs to be calibrated based on the target clamping force and the corresponding torque; in the case of abnormal calibration of the pressure sensor 13, a prompt message is output, and the prompt message is used to prompt the pressure sensor 13 to be recalibrated. For example, the control module 602 is specifically used to obtain the ratio of the clamping force to the corresponding torque; when the ratio is not within the preset ratio interval, it is determined that the pressure sensor 13 needs to be calibrated.

[0169] Optionally, the control module 602 is also used to detect whether the pressure sensor 13 fails while controlling the actuator 14 to move at the second movement speed; if the pressure sensor 13 fails, the actuator 14 is controlled to move at the second movement speed until the torque reaches a target torque corresponding to the target clamping force.

[0170] The pressure control device provided in the embodiment of the present application can be used to execute the aforementioned pressure control method. Its implementation principle, process and beneficial effects can be found in the aforementioned embodiment and will not be repeated here.

[0171] Figure 7 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. The electronic device 700 may be, for example, the control device 11 in the aforementioned pressure shock test machine.

[0172] like Figure 7 As shown, the electronic device 700 may include: a memory 701 and a processor 702. Optionally, the electronic device may further include a transceiver 703, wherein the memory 701 and the processor 702 communicate; illustratively, the memory 701, the processor 702 and the transceiver 703 may communicate via a communication bus 706, the memory 701 is used to store a computer program, and the processor 702 executes the computer program to implement the method of the above embodiment.

[0173] Optionally, the processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), etc. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc. The steps in the method embodiments disclosed in the present application may be directly implemented as being executed by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor.

[0174] The present application also provides a pressure shock test machine, which can be used as follows: Figure 1 As shown, the method used to execute any of the above method embodiments will not be described in detail.

[0175] An embodiment of the present application further provides a testing system, which may include, for example, the aforementioned pressure shock testing machine and a testing subsystem.

[0176] The pressure shock testing machine is used to perform a compression process on the target object by using the pressure control method mentioned in the aforementioned method embodiment.

[0177] For example, the staff can input or trigger the impact test instruction through the human-computer interaction component 15 of the pressure shock testing machine, or the staff can send the target object pressure shock test instruction to the control device 11 of the pressure shock testing machine through the host computer, so that the pressure shock testing machine adopts the pressure control method mentioned in the aforementioned method embodiment to perform compression processing on the target object.

[0178] The test subsystem is used to test the performance of the target object after the compaction process, and obtain and output the test result of the target object.

[0179] The content of the performance test is related to the test requirements of the target object. Taking the target object as a battery cell as an example, the pressure shock test is mainly used to detect whether there is a short circuit when the battery cell is pressed tightly. Therefore, the performance test is mainly to perform a short circuit test on the battery cell.

[0180] The test subsystem may have a display interface, and thus, the test result of the target object may be outputted through its own display interface. Alternatively, the test subsystem may send the test result to its host computer, etc., which will not be described in detail. The test result is used to indicate whether the performance test of the target object has passed.

[0181] An embodiment of the present application further provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, a method in any of the above method embodiments is implemented.

[0182] An embodiment of the present application also provides a computer program product, including a computer program, which implements the method in any of the above method embodiments when the computer program is executed by a processor.

[0183] All or part of the steps of the above-mentioned method embodiments can be completed by hardware related to program instructions. The above-mentioned program can be stored in a readable memory. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the above-mentioned memory (storage medium) includes: read-only memory (ROM), RAM, flash memory, hard disk, solid state drive, magnetic tape, floppy disk, optical disc and any combination thereof.

[0184] The embodiments of the present application are described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processing unit of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processing unit of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0185] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0186] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0187] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

[0188] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0189] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A pressure control method, characterized in that: The method comprises: Obtaining a target pressing force and an approach position of a target object to be pressed; Controlling the actuator to move to the approach position at a first movement speed; The actuator is controlled to move at a second movement speed until the pressing force applied by the actuator to the target object reaches a target pressing force, and the second movement speed is less than the first movement speed.

2. The method according to claim 1, characterized in that The controlling actuator moves to the approach position at a first movement speed, comprising: In the positioning mode, controlling the actuator to move to the approach position at a first movement speed; The controlling the actuator to move at a second movement speed comprises: Switching from the positioning mode to the inching mode; In the jog mode, the actuator is controlled to move at a second movement speed.

3. The method according to claim 1, characterized in that Before the controlling actuator moves to the approach position at the first movement speed, the method further includes: receiving a close position setting instruction, wherein the close position setting instruction includes: a pressing force interval corresponding to the close position; Determining an initial approach position according to the clamping force range, and controlling the actuator to move to the initial approach position at a third movement speed; According to the pressure value applied by the actuator to the target object at the initial approach position and the pressing force range, fine-tuning the initial approach position of the actuator to obtain the approach position; The approach position is stored.

4. The method according to claim 3, characterized in that The step of fine-tuning the initial approach position of the actuator according to the pressure value applied by the actuator to the target object at the initial approach position and the pressing force interval to obtain the approach position includes: When the pressure value corresponding to the initial approach position is less than the lower limit value of the pressing force range, the initial approach position is moved in the pressing direction by a first distance to obtain the approach position; When the pressure value corresponding to the initial approach position is greater than the upper limit value of the pressing force range, the initial approach position is moved a second distance away from the pressing direction to obtain the approach position.

5. The method according to claim 3, characterized in that: The controlling the actuator to move to the initial approach position at a first movement speed comprises: In the positioning mode, controlling the actuator to move to the initial approach position at a third movement speed; The step of fine-tuning the initial approach position of the actuator according to the pressure value applied by the actuator to the target object at the initial approach position and the pressing force interval includes: Switching from the positioning mode to the inching mode; In the inching mode, the initial approach position of the actuator is fine-tuned according to the pressure value applied by the actuator to the target object at the initial approach position and the pressing force range.

6. The method according to claim 1, characterized in that The method further comprises: Acquire a pressure value applied by the actuator to the target object at the approach position; When the pressure value applied by the actuator to the target object at the approach position is less than the lower limit of the clamping force range, the stored approach position is updated to a first approach position, where the first approach position is a position obtained by moving the approach position in a clamping direction by a third distance; When the pressure value corresponding to the approach position is greater than the upper limit value of the pressing force range, the stored approach position is updated to a second approach position, where the second approach position is a position obtained by moving the approach position away from the pressing direction by a fourth distance.

7. The method according to any one of claims 1 to 6, characterized in that: The method further comprises: When the pressing force applied by the actuator to the target object reaches a target pressing force, obtaining a torque corresponding to the pressing force applied by the actuator to the target object; Determining whether a pressure sensor for collecting the pressing force in the actuator needs to be calibrated according to the target pressing force and the corresponding torque; In the case where the pressure sensor is calibrated abnormally, a prompt message is output, where the prompt message is used to prompt the pressure sensor to be recalibrated.

8. The method according to claim 7, characterized in that The determining, based on the clamping force and the corresponding torque, whether a pressure sensor in the actuator for collecting the clamping force needs to be calibrated includes: Obtaining a ratio of the pressing force to the corresponding torque; When the ratio is not within the preset ratio interval, it is determined that the pressure sensor needs to be calibrated.

9. The method according to claim 7, characterized in that: The step of controlling the actuator to move at a second movement speed until the pressing force applied by the actuator to the target object reaches a target pressing force includes: During the process of controlling the actuator to move at the second movement speed, detecting whether the pressure sensor fails; If the pressure sensor fails, the actuator is controlled to move at a second movement speed until the torque reaches a target torque corresponding to the target pressing force.

10. A pressure control device, characterized in that: The device comprises: An acquisition module, used to acquire a target pressing force and a close position of a target object to be pressed; The control module is used to control the actuator to move to the approach position at a first movement speed, and to control the actuator to move at a second movement speed until the pressing force applied by the actuator to the target object reaches a target pressing force, and the second movement speed is less than the first movement speed.

11. An electronic device, characterized in that: The electronic device comprises: a processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 1 to 9.

12. A pressure shock testing machine, characterized in that: The pressure shock testing machine is used to perform the method as described in any one of claims 1-9.

13. A testing system, characterized in that: The test system comprises: a test device, and a pressure shock test machine; The pressure shock testing machine is used to perform a compaction process on a target object using the method described in any one of claims 1 to 9; The test subsystem is used to test the performance of the target object after the compaction process, and obtain and output the test result of the target object; the test result is used to indicate whether the performance test of the target object has passed.

14. The test system according to claim 13, characterized in that: The target object is a battery cell; The test subsystem is specifically used to perform short circuit detection on the battery cell after the compaction process to obtain the test result of the battery cell.

15. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 9 when executed by a processor.

16. A computer program product, characterized in that The invention comprises a computer program, which implements the method according to any one of claims 1 to 9 when being executed by a processor.

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