CN-122029394-A - Electrode drying process monitoring system and method

Abstract

According to one embodiment of the present invention, an electrode drying process monitoring system may include a sensor unit measuring a moisture measurement value and a temperature measurement value of an electrode surface for each of a plurality of sections within a drying furnace in which the drying process is performed each time the electrode drying process is performed, and a control unit identifying the number of mass-affecting sections affecting the electrode mass from the plurality of sections within the drying furnace based on the moisture measurement value and the temperature measurement value, determining a reference value based on whether the moisture measurement value is less than or equal to a correction and whether the number of mass-affecting sections is greater than or equal to the reference number, determining whether a drying furnace condition needs to be corrected for a state of the drying furnace, and controlling progress of a subsequent drying process by adjusting the drying furnace condition according to a result of the determination of necessity of correcting the drying furnace condition.

Inventors

• Liang Xiguang
• Zheng Yiche
• Jin Yuanzan
• ZHANG ENBIN
• GAO MINGJUN

Assignees

• 株式会社LG新能源

Dates

Publication Date

20260512

Application Date

20250729

Priority Date

20240801

Claims (20)

1. 1. An electrode drying process monitoring system for performing a plurality of sections within a drying oven of an electrode drying process, the electrode drying process monitoring system comprising: a sensor portion configured to measure a moisture content and a temperature of an electrode surface in each of the plurality of sections each time the electrode drying process is performed to determine a moisture measurement value and a temperature measurement value, and A control section configured to: Determining a number of mass-affecting sections that affect electrode mass based on the moisture measurement and the temperature measurement in each of the plurality of sections; Determining whether a condition of the drying oven needs to be corrected for a state of the drying oven based on whether the moisture measurement value is less than or equal to a correction determination reference value and whether the number of quality-affecting sections is greater than or equal to a reference number, and And controlling the progress of the next drying process by adjusting the conditions of the drying furnace according to the determination result of whether the conditions of the drying furnace need to be corrected.
2. 2. The electrode drying process monitoring system according to claim 1, wherein the sensor portion comprises: an electrode surface moisture measurement section configured to calculate an average value of moisture content of the electrode surface in real time for each of the plurality of sections to determine the moisture measurement value, and An electrode surface temperature measurement section configured to measure a temperature of the electrode surface in real time for each of the plurality of sections, and determine an average value of the measured temperatures as the temperature measurement value.
3. 3. The electrode drying process monitoring system according to claim 1, wherein the sensor portion comprises: an electrode surface moisture measurement portion configured to measure a moisture content of the electrode surface at a specific point of each of the plurality of sections to determine the moisture measurement value, and An electrode surface temperature measurement configured to measure a temperature of the electrode surface at a particular point of each of the plurality of sections to determine the temperature measurement.
4. 4. The electrode drying process monitoring system according to claim 1, wherein the control portion includes a section-by-section characteristic determination portion configured to determine, based on the moisture measurement value and the temperature measurement value of each of the plurality of sections within the drying furnace, which of the quality-affected section, a drying-completed section, and a regular section each corresponds to each of the drying process.
5. 5. The electrode drying process monitoring system according to claim 4, wherein the section-by-section characteristic determining section is configured to: Determining whether each of the plurality of segments corresponds to the quality-affecting segment based on whether the moisture measurement and the temperature measurement for that segment correspond to a first reference range, and Based on whether the moisture measurement value and the temperature measurement value for each of the plurality of sections correspond to a second reference range that is greater than the first reference range, it is determined whether the section corresponds to the drying-completed section.
6. 6. The electrode drying process monitoring system according to claim 4, wherein the section-by-section characteristic determining section is configured to determine, for each of the plurality of sections, whether the section corresponds to the quality-affecting section based on a rate of change of the moisture measurement value for each of the plurality of sections and whether the rate of change of the temperature measurement value for each of the plurality of sections corresponds to a section-setting reference value.
7. 7. The electrode drying process monitoring system according to claim 1, wherein the control section includes a correction necessity determining section configured to: If the moisture measurement value is less than or equal to the correction determination reference value and the number of the quality-affecting sections is greater than or equal to the reference number, it is determined that correction of the condition of the drying oven is not necessary, or If the moisture measurement exceeds the correction determination reference value or the number of quality-affecting zones is less than the reference number, it is determined that a correction to the conditions of the drying oven is required.
8. 8. The electrode drying process monitoring system according to claim 7, wherein when the correction necessity determining section determines that correction of the condition of the drying oven is required, the correction necessity determining section is configured to: If the number of times of correction of the velocity of the hot air received from the storage portion is greater than or equal to the reference number of times, it is determined that the internal temperature of the drying oven needs to be corrected, or If the number of times of correction of the hot air velocity is smaller than the reference number of times, it is determined that the velocity of hot air supplied into the drying oven needs to be corrected.
9. 9. The electrode drying process monitoring system according to claim 1, wherein the control section includes a drying oven adjustment section, and The drying oven adjustment section is configured to: If a determination result that correction of the condition of the drying oven is required is received, a control signal for correcting the speed of hot air supplied into the drying oven is transmitted to a circulation fan installed at the drying oven, or And if a determination result is received without correcting the condition of the drying oven, transmitting a control signal for maintaining the condition of the drying oven to a circulation fan and a heating part installed at the drying oven.
10. 10. The electrode drying process monitoring system according to claim 9, wherein the drying oven adjustment section is configured to send a control signal for correcting the hot air speed to the circulation fan, and at the same time, the drying oven adjustment section counts the number of times of correction of the hot air speed stored in the storage section.
11. 11. The electrode drying process monitoring system of claim 9, wherein the drying oven adjustment section is configured to: If a result of the determination that the speed of the hot air supplied into the drying oven needs to be corrected is received, a control signal for correcting the speed of the hot air is sent to the circulation fan, and And if a determination result that the internal temperature of the drying oven needs to be corrected is received, transmitting a control signal for correcting the temperature of the hot air to the circulation fan or transmitting a control signal for correcting the temperature of the heating part to the heating part.
12. 12. The electrode drying process monitoring system according to claim 9, wherein when a determination result that correction of a condition of the drying oven is required is received, the drying oven adjusting section is configured to send a control signal for correcting the speed of the hot air to the circulation fan installed in an immediately preceding section of a specific section of the drying oven if the moisture measured value of the specific section exceeds the correction determination reference value.
13. 13. The electrode drying process monitoring system according to claim 9, wherein when a determination result that correction of the condition of the drying oven is required is received, the drying oven adjusting section is configured to send a control signal for correcting the speed of the hot air to the circulation fans installed at front and rear sections of the quality affecting section if the number of sections corresponding to the quality affecting section among the plurality of sections of the drying oven is less than the reference number.
14. 14. The electrode drying process monitoring system according to claim 11, wherein, when a determination result that correction of a condition of the drying oven is required is received, the drying oven adjustment section is configured to, if the moisture measurement value of a specific section among the plurality of sections of the drying oven exceeds the correction determination reference value: Sending a control signal for correcting the temperature of the hot wind to the circulation fan installed in the immediately preceding section of the specific section among the sections of the drying furnace, or A control signal for correcting the temperature of the heating portion is transmitted to the heating portion installed in an immediately preceding section of the specific section.
15. 15. The electrode drying process monitoring system according to claim 11, wherein when a determination result that correction of the condition of the drying oven is required is received, the drying oven adjusting section is configured to transmit a control signal for correcting the temperature of the hot air to the circulation fans installed in front and rear sections of the quality affecting section or transmit a control signal for correcting the temperature of the heating section installed in front and rear sections of the quality affecting section if the number of sections corresponding to the quality affecting section among the plurality of sections of the drying oven is less than the reference number.
16. 16. An electrode drying process monitoring method, comprising the steps of: Obtaining, by a control portion, first drying process data from a sensor portion, the first drying process data including a first moisture measurement value and a first temperature measurement value for each of a plurality of sections within a drying furnace in which a first drying process is performed, and designating, by the control portion, a number of first quality-affecting sections that affect electrode quality among the plurality of sections based on the first moisture measurement value and the first temperature measurement value; Determining, by the control section, based on the number of the first quality-affecting sections and the first moisture measurement value, whether a first drying furnace condition needs to be corrected for a state of the drying furnace performing the first drying process, and And performing, by the control portion, a second drying process by adjusting a speed of hot air inside the drying oven if it is determined that correction is required for the first drying oven condition, and performing, by the control portion, the second drying process in a state in which the first drying oven condition is maintained if it is determined that correction is not required for the first drying oven condition.
17. 17. The electrode drying process monitoring method of claim 16, wherein determining whether correction of the first drying oven condition is required comprises determining that correction of the first drying oven condition is required if the number of first quality affecting zones is less than a reference number and the first moisture measurement exceeds a correction determination reference value.
18. 18. The electrode drying process monitoring method according to claim 16, wherein the step of performing the second drying process comprises the steps of: if it is determined that the first drying oven condition needs to be corrected, a control signal for correcting the speed of hot air supplied into the drying oven is transmitted to a circulation fan installed at the drying oven and the number of times of correction of the speed of hot air is counted, or And if it is determined that correction of the first drying oven condition is not required, transmitting a control signal for maintaining the first drying oven condition to the circulation fan and the heating part.
19. 19. The electrode drying process monitoring method according to claim 18, wherein the step of counting the number of corrections of the hot air velocity comprises the steps of: correcting the speed of the circulation fan installed in an immediately preceding section of a specific section among the plurality of sections of the drying furnace if the moisture measured value of the specific section exceeds a correction determination reference value, and If the number of sections corresponding to the first quality affecting section among the plurality of sections of the drying furnace is less than a reference number, the speed of the circulation fan installed in the front and rear sections of the first quality affecting section is corrected.
20. 20. The electrode drying process monitoring method according to claim 16, further comprising the steps of: Obtaining, by the control portion, second drying process data from the sensor portion, the second drying process data including a second moisture measurement value and a second temperature measurement value for each of the plurality of sections within the drying oven in which the second drying process is performed, and designating, by the control portion, a number of second quality-affecting sections among the plurality of sections based on the second moisture measurement value and the second temperature measurement value; determining, by the control portion, whether or not a second drying furnace condition needs to be corrected for a state of the drying furnace performing the second drying process based on the number of the second quality-affecting sections and the second moisture measurement value, and determining, by the control portion, a type of the second drying furnace condition that needs to be corrected based on the number of times of correction of the speed of hot air received from the storage portion, and The control portion performs a third drying process by adjusting the speed of the hot air supplied into the drying oven if it is determined that the correction is required for the second drying oven condition and the speed of the hot air supplied into the drying oven is determined to be required for the correction among the second drying oven condition, performs the third drying process by adjusting the temperature of the hot air supplied into the drying oven or the temperature of a heating portion installed in the drying oven if it is determined that the correction is required for the second drying oven condition and the internal temperature of the drying oven among the second drying oven condition is determined to be required for the correction, and performs the third drying process by the control portion in a state in which the second drying oven condition is maintained if it is determined that the correction is not required for the second drying oven condition.

Description

Electrode drying process monitoring system and method Technical Field Cross Reference to Related Applications The present application claims priority and benefit from korean patent application 10-2024-0102273, filed on month 8 and 1 of 2024, to the korean intellectual property department, the entire contents of which are incorporated herein by reference. The present disclosure relates to an electrode drying process monitoring system and an electrode drying process monitoring method. Background The electrode manufacturing process used in the secondary battery includes an electrode drying process that dries the slurry after coating using a drying oven. While the electrode drying process is performed, a section where capillary migration of the binder included in the electrode occurs is generated. Capillary migration of the binder can affect the quality of the electrode. For example, if capillary migration of the binder occurs rapidly in a relatively short period of time, the binder may be disproportionately distributed such that the major quality of the electrode is degraded (e.g., defects such as thermal wrinkles or cracks may be generated in the appearance of the electrode, or the adhesion of the electrode is degraded). Therefore, it is necessary to monitor the electrode drying process and correct the state of the drying furnace due to the monitoring to maintain and improve the quality of the electrode. However, conventionally, a drying furnace performing a drying process is divided into a plurality of sections, and the process is performed by measuring the temperature of the electrode surface for each section, or by visually checking the dry state of the electrode surface, which is, however, unquantifiable and largely dependent on subjective determination by a person, so there is a problem that consistency cannot be ensured. Disclosure of Invention Technical problem It is an object of the present disclosure to provide a system and method for monitoring an electrode drying process, which can control the electrode drying process based on an analysis result of data obtained in an electrode drying furnace, thereby improving the quality of an electrode. Technical proposal An electrode drying process monitoring system for performing a plurality of sections within a drying furnace of an electrode drying process according to an embodiment of the present disclosure includes a sensor section that measures a moisture content and a temperature of an electrode surface in each of the plurality of sections each time the electrode drying process is performed to determine a moisture measurement value and a temperature measurement value, and a control section that determines a number of mass-affecting sections affecting an electrode mass based on the moisture measurement value and the temperature measurement value in each of the plurality of sections, determines whether a condition of the drying furnace needs to be corrected for a state of the drying furnace based on whether the moisture measurement value is less than or equal to a correction determination reference value and the number of mass-affecting sections is greater than or equal to a reference number, and controls a progress of a next drying process by adjusting the condition of the drying furnace according to a determination result of whether the correction of the condition of the drying furnace is required. The sensor part may include an electrode surface moisture measuring part calculating an average value of moisture contents of the electrode surface in real time for each of the plurality of sections to determine the moisture measurement value, and an electrode surface temperature measuring part measuring a temperature of the electrode surface in real time for each of the plurality of sections and determining the average value of the measured temperatures as the temperature measurement value. The sensor part may include an electrode surface moisture measuring part that measures a moisture content of the electrode surface at a specific point of each of the plurality of sections to determine the moisture measurement value, and an electrode surface temperature measuring part that measures a temperature of the electrode surface at a specific point of each of the plurality of sections to determine the temperature measurement value. The control part may include a section-by-section characteristic determining part that determines which of the quality-affected section, a drying-completed section, and a conventional section each corresponds to each of the plurality of sections within the drying furnace, based on the moisture measurement value and the temperature measurement value of each of the plurality of sections each time the drying process is performed. The section-by-section characteristic determining section may determine whether each of the plurality of sections corresponds to the quality-affected section based on whether the moisture measurement value and the te