Quality monitoring method and system for negative pressure formation production line

Abstract

The embodiment of the invention discloses a quality monitoring method and system for a negative pressure formation production line, and relates to the technical field of lithium battery production equipment maintaining.The method comprises the steps that pipeline smoothness monitoring and air tightness detection are conducted on a negative pressure system, if set requirements are not met, the negative pressure system is maintained and early warned, and if the set requirements are not met, the negative pressure system is started; performing contact impedance detection on the battery, performing maintenance and early warning if the impedance between the probe and the battery is greater than a set parameter, replacing the probe and early warning if the pressing frequency of the probe is greater than a set value, and arranging sensors at the extension and retraction positions of the air cylinder to obtain the extension duration and the retraction duration of the air cylinder; if the set condition is not met, the air cylinder is maintained and early warned, a temperature sensor is arranged in the press machine to detect the temperature difference between the working state and the running state in the press machine, and if the temperature difference exceeds a set value, early warning is conducted on a heat dissipation system. Through multiple key detections, the problem that the failure rate of equipment in the prior art is difficult to reduce is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery production equipment maintenance, and in particular to a quality monitoring method and system for a negative pressure formation production line. Background Art

[0002] With the continuous development of lithium battery production industry, negative pressure formation equipment plays a vital role in the battery manufacturing process. This equipment can realize the timely removal of gas during the battery formation process, ensure the stability and consistency of SE I film, and thus improve the quality and performance of the battery.

[0003] However, as the degree of automation and integration of negative pressure formation equipment increases, its complexity also increases, which puts higher requirements on the stability and reliability of the equipment. Negative pressure formation equipment is mainly used in the formation stage of lithium batteries. By accurately controlling the gas emission during the formation process, the stability and consistency of the internal structure of the battery are ensured.

[0004] Although negative pressure forming equipment has made significant technological progress, there are still some problems and challenges in its actual application. Among them, the failure rate of the equipment is an urgent problem to be solved. Due to the high degree of automation and integration of the equipment, once a component fails, it is likely to cause the entire equipment to shut down, thereby affecting production progress and product quality. In addition, as the equipment is used for a longer time, the performance of the components will gradually decline, which also brings greater challenges to the maintenance and management of the equipment.

[0005] Therefore, there is an urgent need for a quality monitoring method for negative pressure forming production lines that can monitor the operating status of the equipment in real time, detect potential faults in advance, and monitor and predict the performance of components, thereby improving the stability and reliability of the equipment. Summary of the invention

[0006] Each embodiment of the present invention provides a quality monitoring method for a negative pressure formation production line to solve the problem in the prior art that the equipment failure rate is difficult to reduce due to the automation and high integration of negative pressure formation equipment. The technical solution is as follows:

[0007] According to one aspect of the present invention, a quality monitoring method for a negative pressure formation production line comprises: setting pipeline detection parameters, monitoring the pipeline patency and air tightness of the negative pressure system, if the patency or air tightness of the negative pressure system does not meet the set requirements, maintaining the negative pressure system and issuing an early warning; performing contact impedance detection on the battery, if the impedance between the probe and the battery is greater than the set parameters, maintaining the probe system and issuing an early warning, if the number of probe pressing times is greater than the set value, replacing the probe and issuing an early warning; arranging sensors at the extension and retraction positions of the cylinder to obtain the extension time and retraction time of the cylinder, if the extension time and retraction time do not meet the set conditions, maintaining the cylinder and issuing an early warning; arranging a temperature sensor inside the press to detect the temperature difference inside the press in the working state and during operation, if the temperature difference exceeds the set value, issuing an early warning for the heat dissipation system.

[0008] In one of the embodiments, the pipeline patency monitoring of the negative pressure system is achieved by the following steps: sending the tray carrying the batteries into the forming press, controlling the tray not to be pressed so that the suction nozzle is in a suspended state, and setting the negative pressure test value; opening the proportional valve and the solenoid valve, and reading the data of the negative pressure gauge when the negative pressure system reaches the negative pressure test value. If the value of the negative pressure gauge exceeds the set value, the negative pressure system is maintained and an alarm is issued.

[0009] In one of the embodiments, air tightness monitoring of the negative pressure system is achieved through the following steps: controlling the tray to be pressed so that the nozzle contacts the battery, setting the negative pressure fluctuation range, opening the proportional valve and the solenoid valve to read the data of the negative pressure gauge; when the data of the negative pressure gauge reaches the negative pressure fluctuation range, closing the solenoid valve, calculating the vacuum leakage rate of the negative pressure, and if the vacuum leakage rate is greater than the set value, maintaining the negative pressure system and issuing an alarm.

[0010] In one of the embodiments, contact impedance detection of the battery is achieved by the following steps: a tray carrying the battery is sent into a forming press, the tray is controlled to be pressed so that the probe contacts the battery pole, and the battery is charged with a constant current to obtain a voltage value; the impedance between the probe and the battery is calculated based on the current value of the constant current charging and the obtained voltage value, and if the impedance is greater than the set value, the probe system is maintained and an alarm is issued.

[0011] In one of the embodiments, if the number of probe pressing times is greater than a set value, the probe is replaced and an early warning is issued through the following steps: setting a pressing threshold of the probe, monitoring the pressing operation of the probe, and if the number of probe pressing times is greater than the pressing threshold, the probe is replaced and an early warning is issued.

[0012] In one of the embodiments, sensors are provided at the extension and retraction positions of the cylinder to obtain the extension time and retraction time of the cylinder. If the extension time and retraction time do not meet the set conditions, the cylinder is maintained and an early warning is issued. This is achieved by the following steps: a sensor is provided at the extension position and the retraction position of the cylinder respectively; the sensor is used to generate an extension signal when the cylinder is extended at the extension position, and to generate a retraction signal when the cylinder is retracted at the retracted position; timing is started when the extension signal is detected, and timing is stopped when the retraction signal is monitored to obtain the extension and retraction time, and the extension and retraction time of the cylinder in the normal state and the extension and retraction time in the operating state are obtained; if the difference between the extension and retraction time in the normal state and the extension and retraction time in the operating state is greater than the set value, the cylinder is maintained and an early warning is issued.

[0013] In one of the embodiments, a temperature sensor is provided inside the press to detect the temperature difference between the press in the working state and in operation. If the temperature difference exceeds a set value, a heat dissipation system warning is issued. This is achieved by the following steps: a temperature sensor is provided inside the press; the temperature sensor is used to obtain temperature data inside the press in real time; the temperature value of the temperature sensor when the device is in a normal state and the temperature value of the temperature sensor when the device is in operation are collected; if the difference between the temperature value of the temperature sensor in the normal state and the temperature value of the temperature sensor when the device is in operation is greater than a set value, a heat dissipation system warning is issued.

[0014] According to one aspect of the present invention, a quality monitoring system for a negative pressure forming production line includes a negative pressure monitoring system, a heat dissipation monitoring system, a cylinder monitoring system and a probe monitoring system; the negative pressure detection system is used to set and detect the patency of the negative pressure system pipeline and the air tightness of the negative pressure system; the heat dissipation detection system is used to detect the probe contact impedance and the number of probe pressing times; the cylinder monitoring system is used to detect the cylinder running time; and the heat dissipation monitoring system is used to monitor the internal temperature of the press.

[0015] In one embodiment, the cylinder monitoring system includes an extension sensor and a retraction sensor; the extension sensor is arranged at the extension position of the cylinder; and the retraction sensor is arranged at the retraction position of the cylinder.

[0016] In one of the embodiments, the heat dissipation monitoring system includes a temperature sensor; the temperature sensor is arranged inside the press.

[0017] The beneficial effects brought by the technical solution provided by the present invention are:

[0018] In the above technical scheme, the present invention first sets the pipeline detection parameters, monitors the pipeline patency and airtightness of the negative pressure system, and if the patency or airtightness of the negative pressure system does not meet the set requirements, the negative pressure system is maintained and warned, and the battery is tested for contact impedance. If the impedance between the probe and the battery is greater than the set parameters, the probe system is maintained and warned. If the number of probe pressing times is greater than the set value, the probe is replaced and a warning is issued. Sensors are set at the extension and retraction positions of the cylinder to obtain the extension time and retraction time of the cylinder. If the extension time and retraction time do not meet the set conditions, the cylinder is maintained and warned, and a temperature sensor is set inside the press to detect The temperature difference between the inside of the press in the working state and in operation, if the temperature difference exceeds the set value, the heat dissipation system will be warned. By comprehensively setting a number of key detection parameters, accurate monitoring and maintenance warning of the negative pressure system, battery probe system, cylinder operation and press temperature status are achieved, ensuring the stability of the process environment, improving the reliability of the probe system, reducing the failure rate, effectively preventing the risk of overheating, and ensuring production safety and product quality. It not only significantly improves the level of automated maintenance of the production line, but also enhances the fault warning capability, thereby effectively solving the problem of the existing technology that the failure rate of equipment is difficult to reduce due to the automation and high integration of negative pressure forming equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0020] Figure 1 is a flow chart of a quality monitoring method for a negative pressure formation production line according to an exemplary embodiment;

[0021] Figure 2 It is a schematic diagram of monitoring a probe by a probe monitoring system in an application scenario;

[0022] Figure 3 yes Figure 2 A schematic diagram of monitoring a cylinder by a cylinder monitoring system in a corresponding embodiment;

[0023] Figure 4 yes Figure 2 Schematic diagram of heat dissipation monitoring of a press machine by a heat dissipation monitoring system in a corresponding embodiment;

[0024] Figure 5 is a block diagram of a quality monitoring system for a negative pressure forming production line according to an exemplary embodiment. DETAILED DESCRIPTION

[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention.

[0026] It will be understood by those skilled in the art that, unless expressly stated, the singular forms "one", "said", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present disclosure refers to the presence of the features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0027] The present invention provides a quality monitoring method for a negative pressure formation production line. By combining a visual system, precise calculation and mechanical arm control, a robot can efficiently and accurately grasp a target object, significantly improving production efficiency and product quality. The problem that the equipment failure rate is difficult to reduce in the prior art due to the automation and high integration of negative pressure formation equipment is solved. The quality monitoring method for the negative pressure formation production line is applicable to a quality monitoring device for a negative pressure formation production line, and the quality monitoring device for a negative pressure formation production line can be an electronic device. The quality monitoring method for a negative pressure formation production line in an embodiment of the present invention can be applied to a variety of scenarios, such as quality monitoring of a production line, etc.

[0028] See also Figure 1 , an embodiment of the present invention provides a quality monitoring method for a negative pressure formation production line, which is applicable to electronic equipment.

[0029] In the following method embodiments, for ease of description, the execution subject of each step of the method is taken as an electronic device as an example for illustration, but this does not constitute a specific limitation.

[0030] like Figure 1 As shown, the method may include the following steps:

[0031] Step 110, set pipeline detection parameters, perform pipeline patency monitoring and air tightness detection on the negative pressure system, if the patency or air tightness detection of the negative pressure system does not meet the set requirements, the negative pressure system is maintained and an early warning is issued.

[0032] In one possible implementation, a tray carrying batteries is fed into a forming press, the tray is controlled not to be pressed so that the nozzle is in a suspended state, a negative pressure test value is set, the proportional valve and the solenoid valve are opened, and the data of the negative pressure gauge is read when the negative pressure system reaches the negative pressure test value. If the value of the negative pressure gauge exceeds the set value, the negative pressure system is maintained and an alarm is issued.

[0033] In one possible implementation, the tray is controlled to be pressed so that the nozzle contacts the battery, the negative pressure fluctuation range is set, the proportional valve and the solenoid valve are opened to read the data of the negative pressure gauge, and the solenoid valve is closed when the data of the negative pressure gauge reaches the negative pressure fluctuation range, and the vacuum leakage rate of the negative pressure is calculated. If the vacuum leakage rate is greater than the set value, the negative pressure system is maintained and an alarm is issued.

[0034] Step 130, performing contact impedance detection on the battery, if the impedance between the probe and the battery is greater than the set parameter, the probe system is maintained and an alarm is issued, if the number of probe pressing times is greater than the set value, the probe is replaced and an alarm is issued.

[0035] In one possible implementation, a tray carrying batteries is fed into a forming press, the tray is controlled to be pressed so that the probe contacts the battery pole, the battery is charged with a constant current to obtain a voltage value, and the impedance between the probe and the battery is calculated based on the current value of the constant current charging and the obtained voltage value. If the impedance is greater than the set value, the probe system is maintained and an alarm is issued.

[0036] In a possible implementation, a pressing threshold of the probe is set, and the pressing operation of the probe is monitored. If the number of pressing times of the probe is greater than the pressing threshold, the probe is replaced and an early warning is issued.

[0037] Step 150, setting sensors at the extension and retraction positions of the cylinder to obtain the extension time and retraction time of the cylinder. If the extension time and retraction time do not meet the set conditions, the cylinder is maintained and an alarm is issued.

[0038] In one possible implementation, a sensor is provided at the extended position and the retracted position of the cylinder, and timing starts when the extension signal is detected. Timing is stopped when the retraction signal is detected to obtain the extension and retraction duration. The extension and retraction duration of the cylinder in a normal state and in an operating state are obtained. If the difference between the extension and retraction duration in a normal state and in an operating state is greater than a set value, the cylinder is maintained and an alarm is issued.

[0039] The sensor is used to generate an extension signal when the cylinder is extended in the extended position, and to generate a retraction signal when the cylinder is retracted in the retracted position.

[0040] Step 170, a temperature sensor is provided inside the press to detect the temperature difference inside the press in the working state and during operation. If the temperature difference exceeds a set value, a heat dissipation system warning is issued.

[0041] In one possible implementation, a temperature sensor is provided inside the press to collect the temperature value of the temperature sensor when the device is in a normal state and the temperature value of the temperature sensor when the device is in operation. If the difference between the temperature value of the temperature sensor in a normal state and the temperature value of the temperature sensor when the device is in operation is greater than a set value, a cooling system warning is issued.

[0042] Among them, the temperature sensor is used to obtain the temperature data inside the press in real time

[0043] Through the above process, the embodiment of the present invention first sets the pipeline detection parameters, monitors the pipeline patency and airtightness of the negative pressure system, and if the patency or airtightness of the negative pressure system does not meet the set requirements, the negative pressure system is maintained and an early warning is issued, and the battery is tested for contact impedance. If the impedance between the probe and the battery is greater than the set parameters, the probe system is maintained and an early warning is issued. If the number of probe pressing times is greater than the set value, the probe is replaced and an early warning is issued. Sensors are set at the extension and retraction positions of the cylinder to obtain the extension time and retraction time of the cylinder. If the extension time and retraction time do not meet the set conditions, the cylinder is maintained and an early warning is issued. A temperature sensor is set inside the press to detect The temperature difference inside the pressure measuring bed in the working state and in operation, if the temperature difference exceeds the set value, the heat dissipation system warning will be issued. By comprehensively setting a number of key detection parameters, accurate monitoring and maintenance warning of the negative pressure system, battery probe system, cylinder operation and temperature status of the press are achieved, ensuring the stability of the process environment, improving the reliability of the probe system, reducing the failure rate, effectively preventing the risk of overheating, and ensuring production safety and product quality. It not only significantly improves the level of automated maintenance of the production line, but also enhances the fault warning capability, thereby effectively solving the problem of the existing technology that the failure rate of equipment is difficult to reduce due to the automation and high integration of negative pressure forming equipment.

[0044] In one application scenario, a quality monitoring method for a negative pressure forming production line is run using the quality monitoring system for the negative pressure forming production line of the present invention, which may include the following four steps:

[0045] The first step is to conduct pipeline patency and air tightness tests on the negative pressure system through the negative pressure monitoring system.

[0046] Specifically, the tray carrying the batteries is sent into the forming press, and the tray is controlled not to be pressed, so that the suction nozzle is in a suspended state, that is, connected to the atmosphere, and the negative pressure value is set to -A1kPa. The proportional valve and the solenoid valve are opened, and the data of the negative pressure gauge is read. When the value of the negative pressure gauge is less than -A2kPa, it indicates that the negative pressure system pipeline is not unobstructed, and the negative pressure system is maintained and warned.

[0047] Furthermore, the tray is controlled to be pressed so that the nozzle contacts the battery, the negative pressure value is set to -X1kPa, the proportional valve and the solenoid valve are opened, and the data of the negative pressure gauge is read. When the value of the negative pressure gauge reaches -X1±X2 kPa, the solenoid valve is closed, and the negative pressure leakage rate is calculated after maintaining the pressure for T1min. When the vacuum leakage rate is ≥Y1 kPa / min, it indicates that the airtightness of the negative pressure system is poor, and the negative pressure system should be maintained and warned.

[0048] Among them, A1, A2, X1, X2, T1 and Y1 are set to arbitrary constants according to specific circumstances and are not limited here.

[0049] The second step is to monitor the probe through the probe monitoring system.

[0050] Specifically, a tray carrying batteries is fed into a forming press, and the tray is controlled to be pressed together so that a probe contacts a battery pole to perform contact impedance detection on the battery.

[0051] like Figure 2 As shown, a charging and discharging device is used to perform constant current charging on the battery through A- and A+, and the constant current charging current is set to I. At the same time, the voltage V between V+ and VA+, and between VA- and V- is monitored, and the impedance R=V / I is calculated. The impedance threshold R1 is set. If R>R1mΩ, it is determined that the probe system needs maintenance and an early warning is issued.

[0052] Furthermore, a probe pressing threshold is set, the number of probe pressing times is monitored, and the number of probe pressing times C is recorded. After each pressing, C=C+1. If C is greater than the set pressing threshold, it is determined that the probe needs to be replaced and an early warning is issued.

[0053] The third step is to monitor the cylinder through the cylinder monitoring system.

[0054] like Figure 3 As shown, a sensor is set at the extended position and retracted position of the cylinder to detect the cylinder in place, and the time difference threshold between the extension and retraction of the cylinder is set to Z. When the cylinder is in the extended position, the extension sensor generates a signal I1, and when the cylinder is in the retracted position, the retraction sensor generates a signal I2. When the system detects the signal I1 and gives a signal to drive the cylinder to move, the timing starts, and when the system receives the signal I2, the timing stops. When the cylinder is normal, the time from I1 to I2 is set to T1. The time for the cylinder to move from I1 to I2 during operation is T 2， When T2-T1>Z, it indicates that the cylinder system needs maintenance and an early warning is issued.

[0055] Wherein, Z is set to an arbitrary constant according to specific circumstances and is not limited here.

[0056] The fourth step is to monitor the heat dissipation of the press through the heat dissipation monitoring system.

[0057] like Figure 4 As shown, a temperature probe, i.e., a temperature sensor, is provided inside the press, and the temperature difference threshold is set to M for real-time detection of the temperature inside the press. The temperature value of the temperature sensor collected when the equipment is in normal working condition is set to C1, and the temperature value of the temperature sensor collected in real time during operation of the equipment is C2; when C2-C1>M, it indicates that the cooling system needs maintenance, and an early warning is issued.

[0058] Wherein, M is set to an arbitrary constant according to specific circumstances and is not limited here.

[0059] Through the above process, the embodiment of the present invention realizes accurate monitoring and maintenance warning of the negative pressure system, battery probe system, cylinder operation and press temperature status by comprehensively setting multiple key detection parameters. Specifically, by real-time monitoring of the patency and airtightness of the negative pressure system, system failure is effectively prevented and the stability of the process environment is ensured; strict control of the battery contact impedance not only improves the reliability of the probe system, but also extends the equipment life and reduces the failure rate through the management of the number of pressing times; monitoring of the extension and retraction time of the cylinder further optimizes the equipment operation efficiency, and timely maintenance avoids production delays; and dynamic monitoring of the temperature difference inside the press effectively prevents the risk of overheating and ensures production safety and product quality. The implementation of this series of measures not only significantly improved the level of automated maintenance of the production line, but also enhanced the fault warning capability, laying a solid foundation for achieving efficient and stable continuous production.

[0060] In another application scenario, Figure 5 A quality monitoring system 800 for a negative pressure forming production line is demonstrated.

[0061] The quality monitoring system 800 of the negative pressure formation production line includes but is not limited to: a negative pressure monitoring system 810 , a heat dissipation monitoring system 820 , a cylinder monitoring system 830 and a probe monitoring system 840 .

[0062] Among them, the negative pressure detection system 810 is used to set and detect the patency of the negative pressure system pipeline and the air tightness of the negative pressure system, the heat dissipation monitoring system 820 is used to monitor the internal temperature of the press, the cylinder monitoring system 830 is used to detect the cylinder running time, and the probe monitoring system 840 is used to detect the probe contact impedance and the number of probe pressing times.

[0063] Further, the cylinder monitoring system 830 includes an extension sensor and a retraction sensor, and the heat dissipation monitoring system 820 includes a temperature sensor.

[0064] The extension sensor is arranged at the extension position of the cylinder, the retraction sensor is arranged at the retraction position of the cylinder, and the temperature sensor is arranged inside the press.

[0065] Through the above steps, the quality monitoring system in the embodiment of the present invention realizes comprehensive monitoring of key links of the production line by integrating four major monitoring systems: negative pressure, heat dissipation, cylinder and probe, ensuring the stable operation of the negative pressure system, effectively improving the quality and efficiency of battery formation, and not only monitoring the probe contact impedance and the number of pressing times, but also monitoring the internal temperature of the press in real time through the temperature sensor to prevent the risk of overheating, ensuring equipment safety and product quality. The cylinder monitoring system accurately records the cylinder operation time through the extension and retraction sensors, timely discovers potential faults, and reduces the risk of production interruption. The comprehensive application of this series of monitoring systems has significantly enhanced the self-diagnosis and maintenance capabilities of the production line, providing solid technical support for efficient and stable battery production.

[0066] It should be noted that the quality monitoring of the negative pressure formation production line provided in the above embodiment is only illustrated by the division of the above-mentioned functional modules. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the quality monitoring system of the negative pressure formation production line will be divided into different functional modules to complete all or part of the functions described above.

[0067] In addition, the quality monitoring system of the negative pressure formation production line provided in the above embodiments and the quality monitoring method of the negative pressure formation production line belong to the same concept, and the specific way in which each module performs the operation has been described in detail in the method embodiment and will not be repeated here.

[0068] Compared with the related art, the present invention has the following beneficial effects:

[0069] 1. The present invention first sets pipeline detection parameters, monitors pipeline patency and air tightness of the negative pressure system, and if the patency or air tightness of the negative pressure system does not meet the set requirements, the negative pressure system is maintained and warned, and the battery is tested for contact impedance. If the impedance between the probe and the battery is greater than the set parameters, the probe system is maintained and warned. If the number of probe pressing times is greater than the set value, the probe is replaced and a warning is issued. Sensors are set at the extension and retraction positions of the cylinder to obtain the extension time and retraction time of the cylinder. If the extension time and retraction time do not meet the set conditions, the cylinder is maintained and warned, and a temperature sensor is set inside the press to detect the temperature inside the press. The temperature difference between the working state and the operation is measured. If the temperature difference exceeds the set value, the heat dissipation system will be warned. By comprehensively setting a number of key detection parameters, accurate monitoring and maintenance warning of the negative pressure system, battery probe system, cylinder operation and press temperature status are achieved, ensuring the stability of the process environment, improving the reliability of the probe system, reducing the failure rate, effectively preventing the risk of overheating, and ensuring production safety and product quality. It not only significantly improves the level of automated maintenance of the production line, but also enhances the fault warning capability, thereby effectively solving the problem of the existing technology that the failure rate of equipment is difficult to reduce due to the automation and high integration of negative pressure forming equipment.

[0070] 2. The present invention can collect online abnormal data of the negative pressure forming press, predict the operation trend of the negative pressure forming press equipment, improve the quality of batteries produced by the negative pressure forming press equipment, reduce the abnormal downtime of the equipment, and improve the utilization rate of the equipment.

[0071] 3. The present invention can perform real-time performance monitoring on the negative pressure forming press and promptly discover abnormal conditions of the equipment. By performing preventive maintenance on the negative pressure forming press, the stable operation of the equipment can be ensured, thereby improving the quality of batteries produced by the equipment. By discovering potential faults of the equipment in advance and performing maintenance, the abnormal downtime of the equipment can be effectively reduced, thereby improving the utilization rate of the equipment.

[0072] 4. The present invention can reduce the downtime caused by failures, so that the equipment can be used more for production, thereby improving the overall utilization of the equipment. The collected data can be used to analyze the operating trends of the equipment, help maintenance personnel to formulate maintenance plans in advance, and avoid the occurrence of sudden failures.

[0073] 5. The present invention not only focuses on the negative pressure system, but also covers key components such as the heat dissipation system, cylinder, and probe test system, ensuring the overall performance of the equipment and being easy to implement and maintain in actual production.

[0074] It should be understood that, although the steps in the flowchart of the accompanying drawings are displayed in sequence as indicated by the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least a part of the steps in the flowchart of the accompanying drawings may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be executed in turn or alternately with other steps or at least a part of the sub-steps or stages of other steps.

[0075] The above descriptions are only some embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A quality monitoring method for a negative pressure formation production line, characterized in that: The method comprises: Setting pipeline detection parameters, monitoring pipeline patency and air tightness detection of the negative pressure system, and if the patency or air tightness detection of the negative pressure system does not meet the set requirements, maintaining the negative pressure system and issuing an early warning; Conduct contact impedance detection on the battery. If the impedance between the probe and the battery is greater than the set parameter, the probe system is maintained and an alarm is issued. If the number of probe pressing times is greater than the set value, the probe is replaced and an alarm is issued. Sensors are arranged at the extension and retraction positions of the cylinder to obtain the extension time and retraction time of the cylinder. If the extension time and retraction time do not meet the set conditions, the cylinder is maintained and an early warning is issued; A temperature sensor is arranged inside the press to detect the temperature difference inside the press when it is in working state and when it is in operation. If the temperature difference exceeds the set value, a heat dissipation system warning is issued.

2. The quality monitoring method of the negative pressure formation production line according to claim 1, characterized in that: The monitoring of pipeline patency of the negative pressure system includes: Send the tray with batteries into the forming press, control the tray not to press so that the nozzle is in a suspended state, and set the negative pressure test value; Open the proportional valve and the solenoid valve, and read the data of the negative pressure gauge when the negative pressure system reaches the negative pressure test value. If the value of the negative pressure gauge exceeds the set value, the negative pressure system is maintained and an early warning is issued.

3. The quality monitoring method of the negative pressure formation production line according to claim 1, characterized in that: The air tightness monitoring of the negative pressure system includes: Control the tray to press together so that the nozzle contacts the battery, set the negative pressure fluctuation range, open the proportional valve and solenoid valve to read the data of the negative pressure gauge; When the data of the negative pressure gauge reaches the negative pressure fluctuation range, the solenoid valve is closed, and the vacuum leakage rate of the negative pressure is calculated. If the vacuum leakage rate is greater than the set value, the negative pressure system is maintained and an early warning is issued.

4. The quality monitoring method of the negative pressure formation production line according to claim 1, characterized in that: The contact impedance detection of the battery comprises: The tray carrying the battery is sent to the forming press, and the tray is controlled to be pressed so that the probe contacts the battery pole, and the battery is charged with a constant current to obtain the voltage value; The impedance between the probe and the battery is calculated based on the current value of the constant current charging and the obtained voltage value. If the impedance is greater than a set value, the probe system is maintained and an early warning is issued.

5. The quality monitoring method of the negative pressure formation production line according to claim 1, characterized in that: If the number of probe pressing times is greater than a set value, the probe is replaced and an alarm is issued, including: A pressing threshold of the probe is set, and the pressing operation of the probe is monitored. If the number of pressing times of the probe is greater than the pressing threshold, the probe is replaced and an early warning is issued.

6. The quality monitoring method of the negative pressure formation production line according to claim 1, characterized in that: The sensors are arranged at the extension and retraction positions of the cylinder to obtain the extension time and retraction time of the cylinder. If the extension time and retraction time do not meet the set conditions, the cylinder is maintained and an early warning is issued, including: A sensor is provided at each of the extended position and the retracted position of the cylinder; the sensor is used to generate an extension signal when the cylinder is extended at the extended position, and to generate a retract signal when the cylinder is retracted at the retracted position; Start timing when the extension signal is detected, and stop timing when the retraction signal is detected to obtain the extension time, and obtain the extension time when the cylinder is in a normal state and the extension time when the cylinder is in a running state; If the difference between the telescopic time in the normal state and the telescopic time in the operating state is greater than a set value, the cylinder is maintained and an early warning is issued.

7. The quality monitoring method of the negative pressure formation production line according to claim 1, characterized in that: The temperature sensor is arranged inside the press to detect the temperature difference between the press in the working state and in operation. If the temperature difference exceeds the set value, a heat dissipation system warning is issued, including: A temperature sensor is arranged inside the press; the temperature sensor is used to obtain temperature data inside the press in real time; Collect the temperature value of the temperature sensor when the equipment is in normal state and the temperature value of the temperature sensor when the equipment is in operation; If the difference between the temperature value of the temperature sensor in the normal state and the temperature value of the temperature sensor when the device is in operation is greater than a set value, a heat dissipation system warning is issued.

8. A quality monitoring system for a negative pressure formation production line, characterized in that: It includes a negative pressure monitoring system, a heat dissipation monitoring system, a cylinder monitoring system and a probe monitoring system; the negative pressure detection system is used to set and detect the patency of the negative pressure system pipeline and the air tightness of the negative pressure system; the heat dissipation detection system is used to detect the probe contact impedance and the number of probe pressing times; the cylinder monitoring system is used to detect the cylinder running time; the heat dissipation monitoring system is used to monitor the internal temperature of the press.

9. The quality monitoring system for the negative pressure formation production line according to claim 8, characterized in that: The cylinder monitoring system comprises an extension sensor and a retraction sensor; the extension sensor is arranged at the extension position of the cylinder; the retraction sensor is arranged at the retraction position of the cylinder.

10. The quality monitoring system for the negative pressure formation production line according to claim 8, characterized in that: The heat dissipation monitoring system comprises a temperature sensor; the temperature sensor is arranged inside the press.

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