A method for stabilizing electrode suspension height and an oven

Abstract

This application discloses a method for stabilizing the suspension height of electrode sheets and an oven. The method includes: monitoring the suspension height of the electrode sheets within the oven, and acquiring the frequency of the fan and the opening degree of the air valve within the oven. When the suspension height is outside the stable height range, the opening degree and / or frequency are adjusted until the suspension height enters the stable height range. Therefore, when the electrode sheet deviates from the stable height range, the opening degree of the air valve and / or the frequency of the fan can be dynamically adjusted, achieving closed-loop precise control of the electrode sheet suspension height. This suppresses the vibration amplitude of the electrode sheet within the oven, ensuring that the electrode sheet remains within a dynamically stable height fluctuation range, thereby improving the uniformity of the coating on the electrode sheet surface and ensuring the quality of electrode sheet production.

Description

Technical Field

[0001] This application relates to the field of electrode baking technology, and more specifically, to a method for stabilizing the suspension height of electrodes and an oven. Background Technology

[0002] In the coating and drying process of lithium battery electrode production, the electrode sheets in the oven need to be kept in a suspended state and dried by hot air. The industry generally adopts the suspension method of blowing hot air through the upper and lower nozzles. This method can realize the continuous drying process of the electrode sheets and is the core process of electrode coating production.

[0003] However, the above-mentioned suspension drying method is prone to positional vibration of the continuously moving electrode due to the hot air action of the upper and lower nozzles, and there is no effective means to control the amplitude of the vibration. The coating on the electrode surface is prone to uneven thickness due to the vibration, resulting in poor production quality of the electrode and reducing the overall performance of the lithium battery.

[0004] Maintaining the electrodes within the oven at a stable height within a set range is crucial to prevent uneven coating thickness due to vibration and to ensure electrode production quality. Summary of the Invention

[0005] In view of the above problems, this application provides a method for stabilizing the suspension height of electrode sheets and an oven, so as to maintain the electrode sheets in the oven within a set height range, avoid uneven thickness of the coating on the sheet surface due to vibration, and ensure the quality of electrode sheet production.

[0006] To achieve the above objectives, the following specific solutions are proposed:

[0007] A method for stabilizing the suspension height of an electrode includes:

[0008] Monitor the suspension height of the electrode in the oven, and obtain the frequency of the fan and the opening degree of the air valve in the oven;

[0009] When the suspension height is outside the stable height range, adjust the opening and / or the frequency until the suspension height enters the stable height range.

[0010] Optionally, when the suspension height is outside the stable height range, the opening degree and / or the frequency are adjusted until the suspension height enters the stable height range, including:

[0011] When the suspension height is outside the stable height range, if the opening is less than the upper limit and greater than the lower limit, the opening is adjusted step by step in the direction of the suspension height moving closer to the stable height range until the suspension height enters the stable height range, and then the adjustment of the opening is stopped.

[0012] When the opening is not less than the upper limit of the opening or not greater than the lower limit of the opening, if the suspension height does not enter the stable height range, the frequency is adjusted step by step in the direction of adjustment that moves the suspension height closer to the stable height range, until the suspension height enters the stable height range, and then the frequency adjustment is stopped.

[0013] Optionally, the step-by-step adjustment of the opening includes:

[0014] The opening degree is adjusted by a preset single adjustment amount of the air valve;

[0015] If the floating height does not enter the stable height range after the delay time of the adjusted air valve opening is adjusted, the process returns to the step of adjusting the opening with the preset single adjustment amount of the air valve.

[0016] Optionally, the step-by-step adjustment of the frequency includes:

[0017] The frequency is adjusted by a preset single adjustment amount of the fan;

[0018] If the suspension height does not enter the stable height range after the frequency adjustment delay time of the fan, the process returns to the step of adjusting the frequency with a preset single fan adjustment amount.

[0019] Optionally, the fan is used to control the blowing speed of the lower air nozzle in the oven, and the air valve is used to control the air volume of the upper air nozzle in the oven.

[0020] When the suspension height is outside the stable height range, adjust the opening and / or the frequency until the suspension height enters the stable height range, including:

[0021] When the suspension height is greater than the upper limit of the stable height range, the opening is increased and / or the frequency is decreased until the suspension height enters the stable height range;

[0022] When the suspension height is less than the lower limit of the stable height range, the opening is reduced and / or the frequency is increased until the suspension height enters the stable height range.

[0023] Optionally, increasing the opening and / or decreasing the frequency until the suspension height enters the stable height range includes:

[0024] If the opening is less than the upper limit of the opening, the opening is increased until the suspension height enters the stable height range, and then the opening is stopped from being increased.

[0025] If the opening reaches the upper limit of the opening, the frequency is reduced until the suspension height enters the stable height range, and then the frequency reduction is stopped.

[0026] When the opening reaches its upper limit during the increase, the increase in opening is stopped, and the frequency is reduced until the suspension height enters the stable height range, at which point the reduction in frequency is stopped.

[0027] Optionally, the electrode suspension height stability control method further includes:

[0028] When the frequency reaches the lower limit during the reduction process, if the suspension height does not enter the stable height range, the frequency reduction will stop and a control value error message will be sent to the upper-level system.

[0029] Optionally, reducing the opening and / or increasing the frequency until the suspension height enters the stable height range includes:

[0030] If the opening is greater than the lower limit of the opening, the opening is reduced until the suspension height enters the stable height range, and then the reduction of the opening is stopped.

[0031] If the opening degree reaches the lower limit of the opening degree, the frequency is increased until the suspension height enters the stable height range, and then the frequency is stopped from being increased.

[0032] When the opening reaches the lower limit during the reduction process, the reduction of the opening is stopped, and the frequency is increased until the suspension height enters the stable height range, at which point the increase of the frequency is stopped.

[0033] Optionally, the electrode suspension height stability control method further includes:

[0034] When the frequency reaches its upper limit during the increase, if the suspension height does not enter the stable height range, the frequency increase will stop, and a control value error message will be sent to the superior system.

[0035] An oven includes an electrode suspension height stabilization control device, the electrode suspension height stabilization control device being used to execute the electrode suspension height stabilization control method described above, the electrode suspension height stabilization control device comprising:

[0036] The electrode height monitoring module is used to monitor the suspension height of the electrode in the oven;

[0037] The fan and valve parameter acquisition module is used to acquire the frequency of the fan and the opening degree of the valve in the oven.

[0038] The fan valve parameter adjustment module is used to adjust the opening degree and / or the frequency when the suspension height is outside the stable height range, until the suspension height enters the stable height range.

[0039] Optionally, the fan valve parameter adjustment module includes:

[0040] The damper opening adjustment module is used to adjust the opening in steps in the direction of the floating height moving closer to the stable height range when the floating height is outside the stable height range. If the opening is less than the upper limit and greater than the lower limit, the module will stop adjusting the opening until the floating height enters the stable height range.

[0041] The fan frequency adjustment module is used to adjust the frequency in steps in the direction of the floating height moving closer to the stable height range when the opening degree is not less than the upper limit of the opening degree or not greater than the lower limit of the opening degree, until the floating height enters the stable height range, and then stop adjusting the frequency.

[0042] Optionally, the damper opening adjustment module includes:

[0043] A single-step opening adjustment module is used to adjust the opening by a preset single adjustment amount of the air valve;

[0044] The opening adjustment module is used to return to the single-step opening adjustment module if the suspension height does not enter the stable height range after adjusting the delay time of the air valve after the opening adjustment.

[0045] Optionally, the fan frequency regulation module includes:

[0046] A single-step frequency adjustment module is used to adjust the frequency by a preset single-step adjustment amount of the fan;

[0047] The frequency adjustment module is used to return to the single-step frequency adjustment module if the floating height does not enter the stable height range after the delay time of the fan after frequency adjustment.

[0048] Optionally, the fan is used to control the blowing speed of the lower air nozzle in the oven, and the air valve is used to control the air volume of the upper air nozzle in the oven.

[0049] The fan valve parameter adjustment module includes:

[0050] An electrode height adjustment module is used to increase the opening degree and / or decrease the frequency when the suspension height is greater than the upper limit of the stable height range, until the suspension height enters the stable height range;

[0051] The electrode low adjustment module is used to reduce the opening degree and / or increase the frequency when the suspension height is less than the lower limit of the stable height range, until the suspension height enters the stable height range.

[0052] Optionally, the electrode height adjustment module includes:

[0053] An opening increase module is used to increase the opening if the opening is less than the upper limit of the opening, until the suspension height enters the stable height range, and then stop increasing the opening.

[0054] The frequency reduction module is used to reduce the frequency if the opening reaches the upper limit of the opening, until the suspension height enters the stable height range, and then stop reducing the frequency.

[0055] The frequency opening adjustment module is used to stop increasing the opening and reduce the frequency when the opening reaches the upper limit during the increase process, until the suspension height enters the stable height range, and then stop reducing the frequency.

[0056] Optionally, the electrode suspension height stabilization control device further includes:

[0057] The first error reporting module is used to stop reducing the frequency and send a control value error message to the upper-level system when the frequency reaches the lower limit during the reduction process and the suspension height does not enter the stable height range.

[0058] Optionally, the electrode under-low adjustment module includes:

[0059] An opening reduction module is used to reduce the opening if the opening is greater than the lower limit of the opening, until the suspension height enters the stable height range, and then stop reducing the opening.

[0060] A frequency increasing module is used to increase the frequency if the opening degree reaches the lower limit of the opening degree, until the suspension height enters the stable height range, and then stop increasing the frequency;

[0061] The frequency opening adjustment module is used to stop decreasing the opening when the opening reaches the lower limit during the decreasing process, and to increase the frequency until the suspension height enters the stable height range, at which point the frequency increase stops.

[0062] Optionally, the electrode suspension height stabilization control device further includes:

[0063] The second error reporting module is used to stop increasing the frequency and send a control value error message to the superior system when the frequency reaches the upper limit during the increase of the frequency and the floating height has not entered the stable height range.

[0064] By employing the above technical solution, this application monitors the suspension height of the electrode sheet within the oven and obtains the frequency of the fan and the opening degree of the air valve within the oven. When the suspension height is outside the stable height range, the opening degree and / or frequency are adjusted until the suspension height enters the stable height range. Therefore, when the electrode sheet deviates from the stable height range, the opening degree of the air valve and / or the fan frequency can be dynamically adjusted, achieving closed-loop precise control of the electrode sheet's suspension height. This suppresses the vibration amplitude of the electrode sheet within the oven, ensuring that the electrode sheet always maintains a dynamically stable height fluctuation range, thereby improving the uniformity of the coating on the electrode sheet surface and guaranteeing the quality of electrode sheet production. Attached Figure Description

[0065] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0066] Figure 1 This is a schematic diagram of a process for achieving stable control of the electrode suspension height provided in an embodiment of this application;

[0067] Figure 2 A schematic diagram of a process for adjusting the fan valve of the oven electrode sheet according to an embodiment of this application;

[0068] Figure 3 This is a schematic diagram of a device structure for achieving stable control of electrode suspension height, provided in an embodiment of this application. Detailed Implementation

[0069] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0070] The proposed solution can be implemented based on a terminal with data processing capabilities, such as a computer, cloud, or server.

[0071] Next, combined Figure 1 The electrode suspension height stability control method of this application may include the following steps:

[0072] Step S110: Monitor the suspension height of the electrode in the oven, and obtain the frequency of the fan in the oven and the opening degree of the air valve used to control the air volume of the fan.

[0073] The oven can be equipped with an upper air nozzle at the top and a lower air nozzle at the bottom. A fan can be used to control the airflow speed of the lower air nozzle inside the oven, and an air valve can be used to control the airflow volume of the upper air nozzle inside the oven.

[0074] Understandably, the larger the opening of the damper, the greater the airflow from the upper nozzle, which causes the electrode to move downwards due to the increased airflow from above; conversely, the smaller the opening of the damper, the smaller the airflow from the upper nozzle, which causes the electrode to move upwards due to the decreased airflow from above. Similarly, the higher the frequency of the fan, the greater the airflow speed from the lower nozzle, which causes the electrode to move upwards due to the increased airflow from below; conversely, the lower the fan frequency, the lower the airflow speed from the lower nozzle, which causes the electrode to move upwards due to the decreased airflow from below.

[0075] Step S120: When the suspension height is outside the stable height range, adjust the opening and / or frequency until the suspension height enters the stable height range.

[0076] The stable height range can represent the height range in the oven that allows the coating thickness to be uniform after the electrode is dried. For example, the stable height range can be a value with the standard height position as the zero point, offset upwards by 0.5 mm and downwards by 0.5 mm.

[0077] It is understandable that when the electrode deviates from the stable height range, it is prone to vertical shaking, resulting in uneven thickness of the electrode coating after drying. Therefore, when the suspension height is outside the stable height range, it is necessary to control the air valve and fan to stabilize the electrode back to the stable height range.

[0078] For example, first read the opening data of the air valve and the frequency data of the fan, then check the validity of the opening and frequency data to ensure they are within their upper and lower limits. Monitor the suspension height of the electrode in the oven in real time and determine its relationship with the stable height range. If the suspension height is within the stable height range (between the upper and lower limits), the electrode is currently in a stable state and no height adjustment is needed. If the suspension height is outside the stable height range, adjust the opening of the air valve, adjust the frequency of the fan, or adjust both the opening of the air valve and the frequency of the fan to eventually stabilize the electrode back to the stable height range.

[0079] The electrode suspension height stabilization control method provided in this embodiment monitors the suspension height of the electrode in the drying oven and obtains the frequency of the fan in the oven and the opening degree of the air valve used to control the air volume of the fan. When the suspension height is outside the stable height range, the opening degree and / or frequency are adjusted until the suspension height enters the stable height range. Therefore, when the electrode deviates from the stable height range, the opening degree of the air valve and / or the fan frequency can be dynamically adjusted, achieving closed-loop precise control of the electrode suspension height, suppressing the vibration amplitude of the electrode in the drying oven, and keeping the electrode within a dynamically stable height fluctuation range. This improves the uniformity of the coating on the electrode surface and ensures the quality of electrode production.

[0080] In some embodiments of this application, the adjustment method for the electrode is described, specifically regarding step S120 above, where the opening and / or frequency are adjusted until the suspension height enters the stable height range when the suspension height is outside the stable height range. This process may include:

[0081] S1. When the suspension height is outside the stable height range, if the opening is less than the upper limit and greater than the lower limit, the opening is adjusted step by step in the direction of the suspension height moving towards the stable height range until the suspension height enters the stable height range, and then the adjustment of the opening is stopped.

[0082] The upper and lower limits of the opening can be determined based on the safety performance of the air valve in the electrode baking scenario. For example, the upper limit of the air valve opening is 50%, and the lower limit of the air valve opening is 10%.

[0083] Specifically, when the electrode's suspension height deviates from the stable height range, the adjustment direction of the air valve can be determined based on the actual direction of this deviation. For example, if the electrode's suspension height is higher than the stable height range, the air valve opening can be adjusted step-by-step to increase the upper air pressure, creating a downward force to push the electrode down to the stable range. If the electrode's suspension height is lower than the stable height range, the air valve opening can be adjusted step-by-step to decrease the upper downward air pressure, relying on the existing lower lifting force to push the electrode up. The entire adjustment process can be performed step-by-step according to the preset single adjustment step size of the air valve. After each adjustment, the change in the electrode's suspension height is monitored in real time until the electrode's suspension height returns to the stable height range. At this point, the adjustment of the air valve opening is immediately stopped, maintaining the current air valve opening parameter to ensure the electrode remains in a stable suspension state.

[0084] Understandably, by adjusting the opening in steps, the real-time status of the electrode can be monitored after each adjustment, thus achieving high-precision opening adjustment.

[0085] More specifically, the process of gradually adjusting the opening can include:

[0086] S11. Adjust the opening degree using the preset single adjustment amount of the air valve.

[0087] The single adjustment amount of the air valve can be customized, with a setting range of 2% to 5%.

[0088] S12. After adjusting the delay time of the air valve after adjusting the opening degree, if the suspension height does not enter the stable height range, return to execute S11.

[0089] The damper adjustment delay time can be determined after a pre-test of the damper's response; specifically, it can be 2 seconds. The damper adjustment delay time represents the shortest time from when the adjustment control command is issued to the damper until the damper completes its adjustment action.

[0090] Understandably, if a new adjustment control command is issued after a delay period following the initial adjustment of the damper, this new command will not be based on the state of the electrodes after the damper has completed its adjustment. This indicates that the new command cannot achieve precise control. Therefore, it is necessary to adjust the damper's opening again only after the initial adjustment delay period to ensure accurate adjustment each time.

[0091] S2. When the opening is not less than the upper limit of the opening or not greater than the lower limit of the opening, if the suspension height does not enter the stable height range, the frequency is adjusted step by step in the direction of the suspension height moving closer to the stable height range until the suspension height enters the stable height range, and then the frequency adjustment is stopped.

[0092] Specifically, after the step-by-step adjustment of the damper opening is completed, if the electrode suspension height still has not entered the stable height range, but the damper opening has reached the preset upper or lower limit, and height correction cannot be achieved by further adjusting the damper, then the fan frequency adjustment is initiated. Based on the actual direction of the electrode's deviation from the stable height range, the direction of fan frequency adjustment is determined. If the electrode suspension height is higher than the stable height range, the fan frequency is adjusted step-by-step in the direction of decreasing the fan frequency to reduce the downward lifting force of the hot air, allowing the electrode to naturally move downward under gravity. If the electrode suspension height is lower than the stable height range, the fan frequency is adjusted step-by-step in the direction of increasing the fan frequency to increase the wind speed and pressure of the hot air, increasing the upward lifting force to push the electrode upward. The adjustment process is carried out step-by-step according to the preset single fan adjustment step size. After each adjustment, the electrode suspension height is monitored in real time until the electrode suspension height successfully returns to the stable height range. At this point, the fan frequency adjustment is immediately stopped, maintaining the current fan frequency parameters to achieve precise correction of the electrode suspension height.

[0093] The process of step-by-step frequency adjustment may include:

[0094] S21. Adjust the frequency using the preset single adjustment amount of the fan.

[0095] The single adjustment amount of the fan can be customized, and the setting range is 0.5Hz~3Hz.

[0096] S22. After adjusting the delay time of the fan after frequency adjustment, if the suspension height does not enter the stable height range, return to execute S21.

[0097] The fan adjustment delay time can be determined after a pre-test of the fan's response; specifically, it can be 5 seconds. The fan adjustment delay time represents the shortest time from when the adjustment control command is issued to the fan until the fan completes the adjustment action.

[0098] Understandably, if a new adjustment control command is issued after a delay period following the initial adjustment of the fan, this new command will not be based on the electrode state after the fan has completed its adjustment. This indicates that the new command cannot achieve precise control. Therefore, it is necessary to perform the next frequency adjustment only after the fan has completed its initial adjustment delay period, ensuring precise adjustment each time.

[0099] Furthermore, the case S2 in this embodiment also includes the case where the opening is not less than the upper limit of the opening or not greater than the lower limit of the opening when the suspension height is outside the stable height range. In this case, the frequency can still be adjusted step by step in the direction of adjustment that moves the suspension height closer to the stable height range until the suspension height enters the stable height range, and then the frequency adjustment is stopped.

[0100] The electrode suspension height stabilization control method provided in this embodiment improves the operational space for electrode adjustment by adjusting the opening degree between the upper and lower limits when it is necessary to adjust the electrode suspension height back to the stable height range, and by supplementing the adjustment frequency when the opening degree exceeds the adjustment range. Simultaneously, the step-by-step adjustment method allows for real-time monitoring of the electrode status after each adjustment, thereby ensuring the accuracy of electrode adjustment. In some embodiments of this application, the process of adjusting the opening degree and / or frequency until the suspension height enters the stable height range in step S120, which involves adjusting the opening degree and / or frequency when the suspension height is outside the stable height range, is described for different deviation directions of the electrode. This process may include the following two cases:

[0101] The first method is to increase the opening and / or decrease the frequency when the suspension height is greater than the upper limit of the stable height range, until the suspension height enters the stable height range.

[0102] It is understandable that since the air valve controls the airflow of the upper nozzle and the fan controls the airflow speed of the lower nozzle, if the suspension height is greater than the upper limit of the stable height range, it means that the electrode is too high. At this time, it is necessary to reduce the suspension height of the electrode. This can be achieved by increasing the opening to increase the airflow of the upper nozzle, thereby increasing the downward pressure on the electrode, or by decreasing the frequency to reduce the airflow speed of the lower nozzle, thereby reducing the downward support force on the electrode. Alternatively, both increasing the opening and decreasing the frequency can be done to reduce the suspension height of the electrode.

[0103] Specifically, the process of increasing the opening degree and / or decreasing the frequency until the suspension height enters a stable height range depends on the upper and lower limits of the damper, and can include the following three situations:

[0104] 1) If the opening is less than the upper limit, increase the opening until the suspension height enters the stable height range, then stop increasing the opening.

[0105] It is understandable that when the opening has not reached the upper limit, it indicates that the air valve still has room for adjustment. Therefore, the air valve opening can be increased by stepping on it until the suspension height enters a stable height range, and then the adjustment is completed.

[0106] 2) If the opening reaches the upper limit, reduce the frequency until the suspension height enters a stable height range, then stop reducing the frequency.

[0107] Understandably, when the opening reaches its maximum, it indicates that the damper has no further adjustment range. This also suggests that the support force below the electrode is too great, meaning the lower nozzle is providing excessive airflow to the electrode. Therefore, the fan frequency can be reduced to decrease the support force below the electrode, causing the electrode height to drop. The fan frequency can be reduced using a step-by-step adjustment until the suspension height is monitored to enter a stable range, at which point the adjustment is complete.

[0108] 3) When the opening reaches its upper limit during the increase, stop increasing the opening and reduce the frequency until the suspension height enters a stable height range, then stop reducing the frequency.

[0109] Understandably, adjusting the opening degree alone may not be sufficient to bring the electrode back to a stable height range. If, during the adjustment process, the opening degree reaches its upper limit after a certain step and cannot be increased further, then the increase in opening degree needs to be stopped to ensure the safety of the electrode baking process. At the same time, the fan adjustment logic is invoked to reduce the fan frequency, which can also cause the electrode height to drop until the suspension height is detected to enter a stable height range, thus completing the adjustment.

[0110] In addition, the fan frequency has upper and lower limits for adjustment. For example, the lower limit of the fan frequency is 30Hz and the upper limit of the fan frequency is 48Hz. When the fan frequency is adjusted to reach or fall below the lower limit, if the electrode suspension height still does not enter the stable height range, it indicates that there may be an error in the control parameter settings (such as unreasonable upper and lower limit settings for the damper opening or fan frequency). At this time, it is necessary to immediately stop reducing the fan frequency to avoid safety hazards, and at the same time, a control value error message can be sent to the upper-level system.

[0111] The second method is to reduce the opening and / or increase the frequency when the suspension height is less than the lower limit of the stable height range, until the suspension height enters the stable height range.

[0112] It is understandable that since the air valve controls the airflow of the upper nozzle and the fan controls the airflow speed of the lower nozzle, if the suspension height is less than the lower limit of the stable height range, it means that the electrode is too low. At this time, it is necessary to raise the suspension height of the electrode. This can be achieved by reducing the opening to reduce the airflow of the upper nozzle and reducing the downward pressure on the electrode, or by increasing the fan frequency to increase the airflow speed of the lower nozzle and provide greater support to the electrode. Alternatively, both the opening and the frequency can be increased, which can raise the suspension height of the electrode.

[0113] Specifically, the process of reducing the opening and / or increasing the frequency until the suspension height enters a stable range depends on the upper and lower limits of the damper, and can include the following three scenarios:

[0114] 1. If the opening is greater than the lower limit, reduce the opening until the suspension height enters the stable height range, then stop reducing the opening.

[0115] It is understandable that when the opening does not reach the lower limit, it indicates that the air valve still has room for adjustment. Therefore, the air valve opening can be reduced by gradually decreasing it in a step-by-step manner until the suspension height enters a stable height range, thus completing the adjustment.

[0116] 2. If the opening reaches the lower limit, increase the frequency until the suspension height enters a stable height range, then stop increasing the frequency.

[0117] Understandably, when the opening reaches its lower limit, it indicates that the damper has no further room for adjustment. This also suggests that the support force below the electrode is too weak, meaning the airflow from the lower nozzle to the electrode is insufficient. Therefore, the fan frequency can be increased to increase the support force below the electrode, thus raising its height. The fan frequency can be increased using a step-by-step adjustment until the suspension height is monitored to enter a stable range, at which point the adjustment is complete.

[0118] 3. When the opening reaches the lower limit during the reduction process, stop reducing the opening and increase the frequency until the suspension height enters the stable height range, then stop increasing the frequency.

[0119] Understandably, it may not be possible to adjust the electrode back to a stable height range simply by adjusting the opening. That is, during the adjustment process of reducing the opening, for example, after a certain step, the air valve has reached the lower limit of the opening and cannot be further reduced. In this case, it is necessary to stop reducing the opening to ensure the safety of the electrode baking process. At the same time, the logic of the fan adjustment is called to increase the fan frequency, which can also raise the height of the electrode until the suspension height is detected to enter the stable height range, and the adjustment is completed.

[0120] In addition, since the fan frequency has upper and lower adjustment limits, if the electrode suspension height still does not enter the stable height range when the fan frequency is adjusted to reach or exceed the upper limit, it indicates that there may be an error in the control parameter settings (such as unreasonable upper and lower limit settings for the damper opening or fan frequency). At this time, it is necessary to immediately stop increasing the fan frequency to avoid safety hazards, and at the same time, a control value error message can be sent to the upper-level system.

[0121] Based on the various situations and sub-situations described in this embodiment, the process of adjusting the fan and air valve of the oven electrode sheet described in this embodiment can be referred to... Figure 2 , Figure 2 The adjustment process of the electrode is shown under different conditions when adjustment is required, specifically including:

[0122] Step S210: Determine whether the electrode is too high or too low. If the electrode is too high, proceed to step S220. If the electrode is too low, proceed to step S230.

[0123] Step S220: Determine whether the air valve has reached its upper limit. If yes, proceed to step S240; otherwise, proceed to step S250.

[0124] Step S230: Determine whether the air valve has reached the lower limit. If yes, proceed to step S260; otherwise, proceed to step S270.

[0125] Step S240: Reduce the fan frequency by setting a preset single fan adjustment amount as each step.

[0126] Step S250: Increase the opening of the air valve by each step using the preset single adjustment amount of the air valve.

[0127] Step S260: Increase the fan frequency by using a preset single fan adjustment amount as each step.

[0128] Step S270: Reduce the opening of the air valve by each step using the preset single adjustment amount of the air valve.

[0129] This application also provides an oven, which may include an electrode suspension height stabilization control device, which can be used to execute the electrode suspension height stabilization control method implemented in the foregoing embodiments.

[0130] The apparatus for achieving stable control of electrode suspension height provided in the embodiments of this application will be described below. The apparatus for achieving stable control of electrode suspension height described below can be referred to in correspondence with the method for achieving stable control of electrode suspension height described above.

[0131] See Figure 3 , Figure 3 This is a schematic diagram of a device for achieving stable control of electrode suspension height disclosed in an embodiment of this application.

[0132] like Figure 3 As shown, the device may include:

[0133] Electrode height monitoring module 11 is used to monitor the suspension height of the electrode in the oven;

[0134] The fan and valve parameter acquisition module 12 is used to acquire the frequency of the fan in the oven and the opening degree of the valve.

[0135] The fan valve parameter adjustment module 13 is used to adjust the opening degree and / or the frequency when the suspension height is outside the stable height range, until the suspension height enters the stable height range.

[0136] Optionally, the fan valve parameter adjustment module includes:

[0137] The damper opening adjustment module is used to adjust the opening in steps in the direction of the floating height moving closer to the stable height range when the floating height is outside the stable height range. If the opening is less than the upper limit and greater than the lower limit, the module will stop adjusting the opening until the floating height enters the stable height range.

[0138] The fan frequency adjustment module is used to adjust the frequency in steps in the direction of the floating height moving closer to the stable height range when the opening degree is not less than the upper limit of the opening degree or not greater than the lower limit of the opening degree, until the floating height enters the stable height range, and then stop adjusting the frequency.

[0139] Optionally, the damper opening adjustment module includes:

[0140] A single-step opening adjustment module is used to adjust the opening by a preset single adjustment amount of the air valve;

[0141] The opening adjustment module is used to return to the single-step opening adjustment module if the suspension height does not enter the stable height range after adjusting the delay time of the air valve after the opening adjustment.

[0142] Optionally, the fan frequency regulation module includes:

[0143] A single-step frequency adjustment module is used to adjust the frequency by a preset single-step adjustment amount of the fan;

[0144] The frequency adjustment module is used to return to the single-step frequency adjustment module if the floating height does not enter the stable height range after the delay time of the fan after frequency adjustment.

[0145] Optionally, the fan is used to control the blowing speed of the lower air nozzle in the oven, and the air valve is used to control the air volume of the upper air nozzle in the oven.

[0146] The fan valve parameter adjustment module includes:

[0147] An electrode height adjustment module is used to increase the opening degree and / or decrease the frequency when the suspension height is greater than the upper limit of the stable height range, until the suspension height enters the stable height range;

[0148] The electrode low adjustment module is used to reduce the opening degree and / or increase the frequency when the suspension height is less than the lower limit of the stable height range, until the suspension height enters the stable height range.

[0149] Optionally, the electrode height adjustment module includes:

[0150] An opening increase module is used to increase the opening if the opening is less than the upper limit of the opening, until the suspension height enters the stable height range, and then stop increasing the opening.

[0151] The frequency reduction module is used to reduce the frequency if the opening reaches the upper limit of the opening, until the suspension height enters the stable height range, and then stop reducing the frequency.

[0152] The frequency opening adjustment module is used to stop increasing the opening and reduce the frequency when the opening reaches the upper limit during the increase process, until the suspension height enters the stable height range, and then stop reducing the frequency.

[0153] Optionally, the electrode suspension height stabilization control device further includes:

[0154] The first error reporting module is used to stop reducing the frequency and send a control value error message to the upper-level system when the frequency reaches the lower limit during the reduction process and the suspension height does not enter the stable height range.

[0155] Optionally, the electrode under-low adjustment module includes:

[0156] An opening reduction module is used to reduce the opening if the opening is greater than the lower limit of the opening, until the suspension height enters the stable height range, and then stop reducing the opening.

[0157] A frequency increasing module is used to increase the frequency if the opening degree reaches the lower limit of the opening degree, until the suspension height enters the stable height range, and then stop increasing the frequency;

[0158] The frequency opening adjustment module is used to stop decreasing the opening when the opening reaches the lower limit during the decreasing process, and to increase the frequency until the suspension height enters the stable height range, at which point the frequency increase stops.

[0159] Optionally, the electrode suspension height stabilization control device further includes:

[0160] The second error reporting module is used to stop increasing the frequency and send a control value error message to the superior system when the frequency reaches the upper limit during the increase of the frequency and the floating height has not entered the stable height range.

[0161] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0162] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The various embodiments can be combined as needed, and the same or similar parts can be referred to each other.

[0163] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for stabilizing the suspension height of an electrode, characterized in that, include: Monitor the suspension height of the electrode in the oven, and obtain the frequency of the fan and the opening degree of the air valve in the oven; When the suspension height is outside the stable height range, adjust the opening and / or the frequency until the suspension height enters the stable height range.

2. The method for stabilizing electrode suspension height according to claim 1, characterized in that, When the suspension height is outside the stable height range, adjust the opening and / or the frequency until the suspension height enters the stable height range, including: When the suspension height is outside the stable height range, if the opening is less than the upper limit and greater than the lower limit, the opening is adjusted step by step in the direction of the suspension height moving closer to the stable height range until the suspension height enters the stable height range, and then the adjustment of the opening is stopped. When the opening is not less than the upper limit of the opening or not greater than the lower limit of the opening, if the suspension height does not enter the stable height range, the frequency is adjusted step by step in the direction of adjustment that moves the suspension height closer to the stable height range, until the suspension height enters the stable height range, and then the frequency adjustment is stopped.

3. The method for stabilizing electrode suspension height according to claim 2, characterized in that, The step-by-step adjustment of the opening includes: The opening degree is adjusted by a preset single adjustment amount of the air valve; If the floating height does not enter the stable height range after the delay time of the adjusted air valve opening is adjusted, the process returns to the step of adjusting the opening with the preset single adjustment amount of the air valve.

4. The method for stabilizing electrode suspension height according to claim 2, characterized in that, The step-by-step adjustment of the frequency includes: The frequency is adjusted by a preset single adjustment amount of the fan; If the suspension height does not enter the stable height range after the frequency adjustment delay time of the fan, the process returns to the step of adjusting the frequency with a preset single fan adjustment amount.

5. The method for stabilizing electrode suspension height according to claim 1, characterized in that, The fan is used to control the blowing speed of the lower air nozzle in the oven, and the air valve is used to control the air volume of the upper air nozzle in the oven. When the suspension height is outside the stable height range, adjust the opening and / or the frequency until the suspension height enters the stable height range, including: When the suspension height is greater than the upper limit of the stable height range, the opening is increased and / or the frequency is decreased until the suspension height enters the stable height range; When the suspension height is less than the lower limit of the stable height range, the opening is reduced and / or the frequency is increased until the suspension height enters the stable height range.

6. The method for stabilizing electrode suspension height according to claim 5, characterized in that, Increasing the opening and / or decreasing the frequency until the suspension height enters the stable height range includes: If the opening is less than the upper limit of the opening, the opening is increased until the suspension height enters the stable height range, and then the opening is stopped from being increased. If the opening reaches the upper limit of the opening, the frequency is reduced until the suspension height enters the stable height range, and then the frequency reduction is stopped. When the opening reaches its upper limit during the increase, the increase in opening is stopped, and the frequency is reduced until the suspension height enters the stable height range, at which point the reduction in frequency is stopped.

7. The method for stabilizing electrode suspension height according to claim 6, characterized in that, Also includes: When the frequency reaches the lower limit during the reduction process, if the suspension height does not enter the stable height range, the frequency reduction will stop and a control value error message will be sent to the upper-level system.

8. The method for stabilizing electrode suspension height according to claim 5, characterized in that, Decrease the opening and / or increase the frequency until the suspension height enters the stable height range, including: If the opening is greater than the lower limit of the opening, the opening is reduced until the suspension height enters the stable height range, and then the reduction of the opening is stopped. If the opening degree reaches the lower limit of the opening degree, the frequency is increased until the suspension height enters the stable height range, and then the frequency is stopped from being increased. When the opening reaches the lower limit during the reduction process, the reduction of the opening is stopped, and the frequency is increased until the suspension height enters the stable height range, at which point the increase of the frequency is stopped.

9. The method for stabilizing electrode suspension height according to claim 8, characterized in that, Also includes: When the frequency reaches its upper limit during the increase, if the suspension height does not enter the stable height range, the frequency increase will stop, and a control value error message will be sent to the superior system.

10. An oven, characterized in that, The device includes an electrode suspension height stabilization control device, which is used to perform the electrode suspension height stabilization control method as described in claims 1-9, and the electrode suspension height stabilization control device includes: The electrode height monitoring module is used to monitor the suspension height of the electrode in the oven; The fan and valve parameter acquisition module is used to acquire the frequency of the fan and the opening degree of the valve in the oven. The fan valve parameter adjustment module is used to adjust the opening degree and / or the frequency when the suspension height is outside the stable height range, until the suspension height enters the stable height range.

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