An intelligent control method and system for battery production based on multi-source data

Abstract

The present invention discloses an intelligent control method and system for battery production based on multi-source data, which relates to the technical field of battery production processes. It includes obtaining battery base material information, and based on the battery base material information and the battery production process design, obtaining electrode mixed slurry based on the battery electrode material information and electrode auxiliary material information through material mixing. This solution accurately evaluates the particle size distribution of the electrode mixed slurry through the slurry particle size distribution index to ensure the uniformity of the slurry. By using the slurry mixing uniformity coefficient, detection points are set for the electrode mixed slurry to achieve dynamic setting of the detection points, improving the detection efficiency while ensuring detection accuracy. By using the battery performance index, the optimal thickness of the electrode sheet is set to ensure the maximization of battery production quality. Through battery test data, the stability and reliability of battery quality are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of battery production processes, and specifically to an intelligent control method and system for battery production based on multi-source data. Background Art

[0002] Under the background of the global active promotion of the green energy transformation, as a key energy storage component, the market demand for batteries has shown an explosive growth. From the booming development of electric vehicles to the widespread popularity of various portable electronic devices, the application scenarios of batteries have been continuously expanded. At the same time, the market has put forward extremely stringent requirements for the performance, quality and safety of batteries. Due to the excessive dependence on manual experience in the traditional battery production mode, it is difficult to ensure the consistency and stability of products in the face of complex and changeable production conditions, resulting in low production efficiency and serious waste of resources. To break through these development bottlenecks, the introduction of advanced intelligent control technology has become an inevitable choice for the upgrading of the battery industry. The rise of multi-source data fusion technology has brought new opportunities for the intelligent control of battery production. By integrating multi-dimensional information such as process parameter data and quality inspection data generated during the production process, it can realize the refined and intelligent management of the whole process of battery production, and also promote the entire battery industry to develop in the direction of green, efficient and sustainable.

[0003] Currently, there are still problems in the management of battery production, such as the inability to accurately analyze the electrode mixed slurry during the battery production process. The uniformity of the electrode mixed slurry greatly affects the performance of the battery. If the indexes such as particle size distribution, viscosity, conductivity, and solid content of the slurry are detected separately, the detection cost is relatively high and the time cost is large. However, if only several of these indexes are detected, it is impossible to ensure the uniformity of the slurry, and it is impossible to set an optimal value for the thickness of the electrode sheet according to the actual application conditions of the battery, and it is impossible to accurately detect the battery. Summary of the Invention

[0004] To solve the above technical problems, an intelligent control method and system for battery production based on multi-source data are provided. The technical solution solves the problems proposed in the above background art, such as the inability to accurately analyze the electrode mixed slurry during the battery production process. The uniformity of the electrode mixed slurry greatly affects the performance of the battery. If the indexes such as particle size distribution, viscosity, conductivity, and solid content of the slurry are detected separately, the detection cost is relatively high and the time cost is large. However, if only several of these indexes are detected, it is impossible to ensure the uniformity of the slurry, and it is impossible to set an optimal value for the thickness of the electrode sheet according to the actual application conditions of the battery, and it is impossible to accurately detect the battery.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] An intelligent control method for battery production based on multi-source data, comprising:

[0007] Obtain battery basic material information, where the battery basic material information includes battery substrate material information and battery electrode material information;

[0008] According to the battery basic material information and based on the battery production process design, obtain electrode auxiliary material information, where the electrode auxiliary material information includes binder information and conductive additive information;

[0009] According to the battery electrode material information and the electrode auxiliary material information, and based on material mixing, obtain electrode mixed slurry;

[0010] Based on the analysis of mixing uniformity, detect the electrode mixed slurry to determine whether it meets the production standards. If not, adjust the feeding ratio of the battery electrode material and the electrode auxiliary material and the material mixing settings until the electrode mixed slurry meets the production standards. If so, coat the battery substrate according to the electrode mixed slurry information to obtain battery electrode sheets;

[0011] According to the battery electrode sheets, detect the thickness of the electrode sheets to obtain electrode sheet thickness data;

[0012] According to the electrode sheet thickness data, determine whether the thickness of the electrode sheets meets the production standards. If not, adjust the thickness of the electrode sheets. If so, package and inject liquid into the electrode sheets to obtain basic batteries;

[0013] Activate the basic batteries and obtain battery test data based on charge and discharge tests;

[0014] According to the battery test data, determine whether the basic batteries meet the production standards. If not, adjust the basic batteries until the reference batteries meet the production standards. If so, the basic batteries are qualified.

[0015] Preferably, the detecting the electrode mixed slurry based on the analysis of mixing uniformity to determine whether it meets the production standards specifically includes:

[0016] Based on the analysis of mixing uniformity, perform particle size distribution detection on the electrode mixed slurry to obtain mixed slurry particle size distribution information;

[0017] According to the mixed slurry particle size distribution information, obtain particle size distribution curve information, where the particle size distribution curve represents the proportion of particles with different particle sizes in the electrode mixed slurry;

[0018] According to the particle size distribution curve information, obtain the first characteristic particle size, the second characteristic particle size, and the third characteristic particle size;

[0019] Among them, 90% of the particle sizes in the electrode mixed paste are smaller than the first characteristic particle size, 50% of the particle sizes in the electrode mixed paste are smaller than the second characteristic particle size, and 10% of the particle sizes in the electrode mixed paste are smaller than the third characteristic particle size;

[0020] According to the first characteristic particle size, the second characteristic particle size and the third characteristic particle size, based on the particle size distribution width calculation formula, obtain the polydispersity index;

[0021] According to the particle size distribution curve information, obtain the particle size distribution coefficient;

[0022] According to the polydispersity index and the particle size distribution coefficient, obtain the particle size distribution index of the paste;

[0023] According to the battery electrode material information, based on the material property analysis, obtain the particle size distribution index threshold of the paste;

[0024] According to the particle size distribution index of the paste and the particle size distribution index threshold of the paste, judge whether the particle size distribution of the electrode mixed paste meets the production standard;

[0025] If the particle size distribution of the electrode mixed paste does not meet the production standard, adjust the material mixing settings. If the particle size distribution index of the paste still does not meet the production standard after adjusting the material mixing settings, adjust the feeding ratios of the battery electrode material and the electrode auxiliary material until the electrode mixed paste meets the production standard. The material mixing settings include mixing time, mixing speed and mixing temperature;

[0026] If the particle size distribution of the electrode mixed paste meets the production standard, perform viscosity detection and conductivity detection on the electrode mixed paste to judge whether the electrode mixed paste meets the production standard. If not, adjust the types and feeding ratios of the battery electrode material and the electrode auxiliary material. If so, coat the battery substrate according to the electrode mixed paste information to obtain the battery electrode sheet;

[0027] Among them, if the particle size distribution index of the paste meets , then the particle size distribution of the electrode mixed paste meets the production standard. If or , then the particle size distribution of the electrode mixed paste does not meet the production standard. and are the particle size distribution index thresholds of the paste;

[0028] The calculation formula of the particle size distribution index of the paste is:

[0029] ;

[0030] In the formula, represents the particle size distribution index of the paste, is the first characteristic particle size, is the second characteristic particle size is the third characteristic particle size is the particle size distribution coefficient

[0031] Preferably, obtaining the particle size distribution coefficient according to the particle size distribution curve information specifically includes:

[0032] Obtaining the particle size proportion information according to the particle size distribution curve information, where the particle size proportion information represents the proportion information of each particle size in the electrode mixed paste;

[0033] Obtaining the calibrated particle size information according to the particle size proportion information based on the surface area weighted average particle size calculation formula;

[0034] Taking the average value of the first characteristic particle size and the third characteristic particle size as the characteristic particle size;

[0035] Sorting the calibrated particle size, the characteristic particle size, and the second characteristic particle size in ascending order of particle size value to obtain the particle size order information, where the particle size order information includes the first intermediate particle size, the second intermediate particle size, and the third intermediate particle size;

[0036] Obtaining the particle size distribution coefficient according to the particle size order information;

[0037] Among them, the particle size distribution coefficient is specifically:

[0038] ;

[0039] In the formula, is the particle size distribution coefficient, , and are the first intermediate particle size, the second intermediate particle size, and the third intermediate particle size respectively, is the first characteristic particle size, is the second characteristic particle size, is the third characteristic particle size, is the surface area weighted average particle size, represents the particle size value of the i-th kind of particle, represents the proportion of the particle size value of the i-th kind of particle, max represents the maximum value, min represents the minimum value, and mid represents the intermediate value.

[0040] Preferably, performing viscosity detection and conductivity detection on the electrode mixed paste to determine whether the electrode mixed paste meets the production standard specifically includes:

[0041] Obtaining the slurry mixing uniformity coefficient according to the slurry particle size distribution index and the slurry particle size distribution index threshold;

[0042] Set detection points for the electrode mixed paste according to the paste mixing uniformity coefficient, and obtain the detection point information;

[0043] Based on the detection point information, perform viscosity detection and conductivity detection on the electrode mixed paste to obtain the paste detection data for each point. The paste detection data includes paste viscosity data and paste conductivity data;

[0044] According to the battery electrode material information and electrode auxiliary material information, based on the production process analysis, obtain the paste viscosity threshold and paste conductivity threshold. Both the paste viscosity threshold and paste conductivity threshold are range thresholds;

[0045] According to the paste detection data, paste viscosity threshold and paste conductivity threshold, determine whether the viscosity and conductivity of the electrode mixed paste meet the production standards. If not, adjust the types and dosing ratios of the battery electrode materials and electrode auxiliary materials. If so, coat the battery substrate according to the electrode mixed paste information to obtain the battery electrode sheet;

[0046] Among them, if the paste mixing uniformity coefficient , set detection points at the center of the axis of the electrode mixed paste, 1 cm above the bottom of the electrode mixed paste on the axis, and 1 cm below the top of the electrode mixed paste on the axis;

[0047] If , set detection points at 1 / 4, 1 / 2, and 3 / 4 of the depth of the electrode mixed paste, and at 1 / 3 and 2 / 3 of the radius at the same depth of the electrode mixed paste;

[0048] ;

[0049] In the formula, T is the paste mixing uniformity coefficient, represents the paste particle size distribution index, and are the paste particle size distribution index thresholds.

[0050] Preferably, the coating of the battery substrate according to the electrode mixed paste information to obtain the battery electrode sheet specifically includes:

[0051] Obtain the battery production process information, which includes the electrode sheet standard thickness information;

[0052] According to the battery production process information, obtain the maximum standard thickness and minimum standard thickness of the electrode sheet;

[0053] Obtain the historical battery production data, which includes historical battery production material information and historical battery parameter information;

[0054] Based on the battery substrate material and the battery electrode material, screen the historical battery production data to obtain battery production reference data, where the battery production reference data represents the historical battery production data corresponding to the batteries produced with the same battery substrate material and battery electrode material in the historical battery production data;

[0055] According to the battery production reference data, obtain the historical electrode sheet thickness data, battery capacity data, and battery charge-discharge efficiency information;

[0056] Based on the battery application requirements, set weights for the battery capacity and the battery charge-discharge efficiency respectively;

[0057] According to the set weights, battery capacity data, and battery charge-discharge efficiency information, obtain the battery performance index;

[0058] Based on the historical electrode sheet thickness data, take the electrode sheet thickness corresponding to the maximum value of the battery performance index as the optimal electrode sheet thickness;

[0059] According to the optimal electrode sheet thickness, coat the battery substrate to obtain the battery electrode sheet;

[0060] The battery performance index is:

[0061] ;

[0062] In the formula, S is the battery performance index, is the weight of the battery capacity, C is the battery capacity, is the weight of the battery charge-discharge efficiency, is the battery charge-discharge efficiency.

[0063] Preferably, the judging whether the electrode sheet thickness meets the production standard according to the electrode sheet thickness data specifically includes:

[0064] According to the electrode sheet thickness data, obtain the maximum electrode sheet thickness and the minimum electrode sheet thickness;

[0065] Take the difference between the maximum electrode sheet thickness and the minimum electrode sheet thickness as the electrode sheet thickness difference value;

[0066] Obtain the nearest electrode sheet thickness;

[0067] Take the ratio of the electrode sheet thickness difference value to the nearest electrode sheet thickness as the electrode sheet thickness uniformity index;

[0068] Based on the electrode sheet thickness difference standard, judge whether the electrode sheet thickness meets the production standard according to the electrode sheet thickness uniformity index. If not, adjust the electrode sheet thickness. If so, obtain the battery separator information according to the battery base material information;

[0069] The battery is encapsulated according to the battery electrode sheet and the battery separator to obtain an encapsulated battery;

[0070] The battery electrolyte information is obtained according to the battery electrode material information and the electrode auxiliary material information;

[0071] Based on the battery electrolyte information, the encapsulated battery is filled with liquid to obtain a basic battery;

[0072] The basic battery is activated, and based on the charge and discharge test, battery test data is obtained, where the battery test data includes the battery charging time, the battery discharging time, and the battery capacity;

[0073] The battery capacity information and the battery charge and discharge efficiency information are obtained according to the battery test data;

[0074] Based on the battery design standard, the battery capacity threshold and the battery charge and discharge efficiency threshold are obtained;

[0075] According to the battery capacity, the battery charge and discharge efficiency, the battery capacity threshold, and the battery charge and discharge efficiency threshold, it is judged whether the basic battery meets the production standard. If not, the basic battery is adjusted until the reference battery meets the production standard. If so, the basic battery is qualified.

[0076] Furthermore, an intelligent control system for battery production based on multi-source data is proposed to implement the control method as described above, including:

[0077] The main control module is used to detect the electrode mixed paste, judge whether it meets the production standard, judge whether the electrode sheet thickness meets the production standard according to the electrode sheet thickness data, judge whether the basic battery meets the production standard according to the battery test data, obtain the particle size distribution curve information according to the particle size distribution information of the mixed paste, obtain the first characteristic particle size, the second characteristic particle size, and the third characteristic particle size according to the particle size distribution curve information, obtain the particle size proportion information according to the particle size distribution curve information, obtain the calibrated particle size information based on the surface area weighted average particle size calculation formula according to the particle size proportion information, and set the detection points for the electrode mixed paste according to the slurry mixing uniformity coefficient to obtain the detection point information;

[0078] An information acquisition module, which is used to acquire battery base material information, battery substrate material information, battery electrode material information, and historical battery production data. Based on the battery production process design according to the battery base material information, it acquires electrode auxiliary material information, binder information, and conductive additive information, performs particle size distribution detection on the electrode mixed slurry to obtain the mixed slurry particle size distribution information, performs viscosity detection and conductivity detection on the electrode mixed slurry to obtain slurry detection data, measures the thickness of the electrode sheet according to the battery electrode sheet to obtain electrode sheet thickness data, activates the basic battery, and based on charge and discharge tests, obtains battery test data;

[0079] An evaluation module, which is used to obtain the polydispersity index based on the particle size distribution width calculation formula according to the first characteristic particle size, the second characteristic particle size, and the third characteristic particle size, obtain the particle size distribution coefficient according to the particle size distribution curve information, obtain the slurry particle size distribution index according to the polydispersity index and the particle size distribution coefficient, obtain the slurry mixing uniformity coefficient according to the slurry particle size distribution index and the slurry particle size distribution index threshold, obtain the battery performance index according to the set weight, battery capacity data, and battery charge and discharge efficiency information, and use the ratio of the electrode sheet thickness difference value to the most recent thickness of the electrode sheet as the electrode sheet thickness uniformity index;

[0080] A display module, which interacts with the main control module and is used to output and display the mixed slurry particle size distribution information, the slurry particle size distribution index, the slurry detection data, and the battery test data, and set the weights of the battery capacity and the battery charge and discharge efficiency.

[0081] Optionally, the main control module specifically includes:

[0082] A control unit, which is used to obtain the particle size distribution curve information according to the mixed slurry particle size distribution information, obtain the first characteristic particle size, the second characteristic particle size, and the third characteristic particle size according to the particle size distribution curve information, obtain the particle size proportion information according to the particle size distribution curve information, obtain the calibrated particle size information based on the surface area weighted average particle size calculation formula according to the particle size proportion information, set detection points for the electrode mixed slurry according to the slurry mixing uniformity coefficient, and obtain the detection point information;

[0083] An information receiving unit, which interacts with the information acquisition module and the evaluation module and is used to receive data and transmit it to the judgment unit;

[0084] A judgment unit, which is used to detect the electrode mixed slurry to judge whether it meets the production standard, judge whether the electrode sheet thickness meets the production standard according to the electrode sheet thickness data, and judge whether the basic battery meets the production standard according to the battery test data.

[0085] Optionally, the information acquisition module specifically includes:

[0086] A first acquisition unit, which is used to acquire battery base material information, battery substrate material information, battery electrode material information, and historical battery production data, and based on the battery base material information and battery production process design, acquire electrode auxiliary material information, binder information, and conductive additive information;

[0087] A second acquisition unit, which is used to detect the particle size distribution of the electrode mixed slurry to obtain the mixed slurry particle size distribution information, detect the viscosity and conductivity of the electrode mixed slurry to obtain the slurry detection data, detect the thickness of the electrode sheet based on the battery electrode sheet to obtain the electrode sheet thickness data, activate the basic battery, and based on charge and discharge tests, obtain the battery test data.

[0088] Optionally, the evaluation module specifically includes:

[0089] A first evaluation unit, which is used to obtain the polydispersity index based on the first characteristic particle size, the second characteristic particle size, and the third characteristic particle size according to the particle size distribution width calculation formula, obtain the particle size distribution coefficient according to the particle size distribution curve information, and obtain the slurry particle size distribution index according to the polydispersity index and the particle size distribution coefficient;

[0090] A second evaluation unit, which is used to obtain the slurry mixing uniformity coefficient according to the slurry particle size distribution index and the slurry particle size distribution index threshold, obtain the battery performance index according to the set weight, battery capacity data, and battery charge and discharge efficiency information, and use the ratio of the electrode sheet thickness difference value to the latest thickness of the electrode sheet as the electrode sheet thickness uniformity index.

[0091] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0092] The present invention proposes a battery production intelligent control method and system based on multi-source data. By means of the slurry particle size distribution index, the particle size distribution condition of the electrode mixed slurry is accurately evaluated to ensure the uniformity of the slurry. By means of the slurry mixing uniformity coefficient, detection points are set for the electrode mixed slurry to realize the dynamic setting of the detection points, improving the detection efficiency while ensuring the detection accuracy. By means of the battery performance index, the optimal thickness of the electrode sheet is set to ensure the maximization of battery production quality. By means of the battery test data, the stability and reliability of the battery quality are ensured. Description of the Drawings

[0093] Figure 1 It is a flowchart of a battery production intelligent control method based on multi-source data proposed by the present invention;

[0094] Figure 2 It is the flow chart for obtaining the particle size distribution index of the slurry in the present invention;

[0095] Figure 3 It is the flow chart for obtaining the battery electrode sheet in the present invention;

[0096] Figure 4 It is the flow chart for obtaining the optimal thickness of the electrode sheet in the present invention;

[0097] Figure 5 It is the structural block diagram of an intelligent control system for battery production based on multi-source data proposed by the present invention. Specific embodiments

[0098] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments in the following description are only examples, and those skilled in the art can think of other obvious variations.

[0099] Refer to Figure 1 - Figure 4 As shown, an intelligent control method for battery production based on multi-source data in an embodiment of the present invention includes:

[0100] Obtain battery basic material information, where the battery basic material information includes battery substrate material information and battery electrode material information;

[0101] According to the battery basic material information and based on the battery production process design, obtain electrode auxiliary material information, where the electrode auxiliary material information includes binder information and conductive additive information;

[0102] According to the battery electrode material information and the electrode auxiliary material information and based on material mixing, obtain electrode mixed slurry;

[0103] Based on the analysis of mixing uniformity, detect the electrode mixed slurry to determine whether it meets the production standard. If not, adjust the feeding ratio of the battery electrode material and the electrode auxiliary material and the material mixing settings until the electrode mixed slurry meets the production standard. If so, coat the battery substrate according to the electrode mixed slurry information to obtain a battery electrode sheet;

[0104] Specifically, based on the analysis of mixing uniformity, detect the electrode mixed slurry to determine whether it meets the production standard, which specifically includes:

[0105] Based on the analysis of mixing uniformity, perform a particle size distribution detection on the electrode mixed slurry to obtain the particle size distribution information of the mixed slurry;

[0106] According to the particle size distribution information of the mixed slurry, obtain the particle size distribution curve information, where the particle size distribution curve represents the proportion of particles with different particle sizes in the electrode mixed slurry;

[0107] Obtain the first characteristic particle size, the second characteristic particle size, and the third characteristic particle size according to the particle size distribution curve information;

[0108] Among them, 90% of the particle sizes in the electrode mixed slurry are less than the first characteristic particle size, 50% of the particle sizes in the electrode mixed slurry are less than the second characteristic particle size, and 10% of the particle sizes in the electrode mixed slurry are less than the third characteristic particle size;

[0109] Based on the first characteristic particle size, the second characteristic particle size, and the third characteristic particle size, obtain the polydispersity index according to the particle size distribution width calculation formula;

[0110] Obtain the particle size distribution coefficient according to the particle size distribution curve information;

[0111] Obtain the slurry particle size distribution index according to the polydispersity index and the particle size distribution coefficient;

[0112] Based on the battery electrode material information and through material property analysis, obtain the threshold value of the slurry particle size distribution index;

[0113] Judge whether the particle size distribution of the electrode mixed slurry meets the production standard according to the slurry particle size distribution index and the threshold value of the slurry particle size distribution index;

[0114] If the particle size distribution of the electrode mixed slurry does not meet the production standard, adjust the material mixing settings. If the slurry particle size distribution index still does not meet the production standard after adjusting the material mixing settings, adjust the feeding ratios of the battery electrode material and the electrode auxiliary material until the electrode mixed slurry meets the production standard. The material mixing settings include mixing time, mixing speed, and mixing temperature;

[0115] If the particle size distribution of the electrode mixed slurry meets the production standard, conduct viscosity detection and conductivity detection on the electrode mixed slurry to judge whether the electrode mixed slurry meets the production standard. If not, adjust the types and feeding ratios of the battery electrode material and the electrode auxiliary material. If so, coat the battery substrate according to the electrode mixed slurry information to obtain the battery electrode sheet;

[0116] Among them, if the slurry particle size distribution index meets , then the particle size distribution of the electrode mixed slurry meets the production standard. If or , then the particle size distribution of the electrode mixed slurry does not meet the production standard, and are the threshold values of the slurry particle size distribution index;

[0117] The calculation formula of the slurry particle size distribution index is:

[0118] ;

[0119] In the formula, represents the slurry particle size distribution index, is the first characteristic particle size, is the second characteristic particle size, is the third characteristic particle size, is the particle size distribution coefficient.

[0120] In this solution, by detecting the particle size distribution of the electrode mixed slurry, the proportion of particles with different particle sizes in the electrode mixed slurry is obtained. Through the proportion data, the first characteristic particle size, the second characteristic particle size, and the third characteristic particle size are obtained. According to the first characteristic particle size, the second characteristic particle size, and the third characteristic particle size, based on the particle size distribution width calculation formula, the polydispersity index is obtained. According to the polydispersity index and the particle size distribution coefficient, the slurry particle size distribution index is obtained. According to the slurry particle size distribution index and the slurry particle size distribution index threshold, it is judged whether the particle size distribution of the electrode mixed slurry meets the production standard;

[0121] It can be understood that after the electrode material is determined, the positive electrode material (such as lithium cobaltate, nickel cobalt lithium cobaltate) or the negative electrode material (such as graphite, silicon) of the battery, through a special mixing device (such as a planetary mixer, a ball mill, etc.), the positive and negative electrode materials are uniformly mixed with a binder (such as polyvinylidene fluoride PVDF) and a conductive additive (such as carbon black). The mixed material slurry is uniformly coated on a substrate film (the positive electrode is generally coated on aluminum foil, and the negative electrode is coated on copper foil) to obtain an electrode sheet. For battery production, the quality of the electrode sheet directly affects the performance of the battery, including conductivity, stability, and life, etc. Therefore, the process needs to ensure the uniform distribution of all materials. During the mixing process, the uniformity of the mixing process is usually monitored through indicators such as particle size distribution, viscosity, solid content, infrared spectroscopy analysis, conductivity, etc. Among them, the monitoring of the viscosity distribution is particularly important. The particle size distribution directly affects the conductivity and stability of the battery electrode material. Finer particles can increase the specific surface area of the electrode material, thereby improving the capacity and charge-discharge rate of the battery. However, too small particle size may lead to increased viscosity, uneven coating, etc. Therefore, in this solution, based on the detection of the particle size distribution, it is extended to the detection of other indicators. The particle size distribution should be as narrow as possible. A uniform particle size distribution helps the uniform mixing of materials and avoids the formation of agglomeration phenomena, resulting in unstable battery performance;

[0122] It should be noted that in the particle size distribution detection, the polydispersity index (Span) is a commonly used index to measure the width or dispersion of particle distribution, and is usually used to characterize the uniformity of particle or particle size distribution. The Span value is usually used in particle size analysis, especially in the fields of colloids, suspensions, powder materials, etc., to evaluate the dispersion of samples. Therefore, through the slurry particle size distribution index, an accurate evaluation of the slurry particle size distribution can be achieved.

[0123] In this embodiment, the threshold of the slurry particle size distribution index is set according to the battery electrode material. For lithium-ion batteries, it is more ideal if the threshold of the slurry particle size distribution index is between 0.1 and 0.3. When the slurry particle size distribution index exceeds 0.3, it means that the particle size distribution in the slurry is relatively wide and the particle size difference is large, which will lead to uneven distribution of the electrode material during the coating process, affect the performance consistency of the electrode, and reduce the charge-discharge efficiency and cycle stability of the battery. If the slurry particle size distribution index is less than 0.1, it indicates that the particle size distribution is too concentrated, the input cost is relatively high when preparing the slurry, or in some cases, it is not conducive to forming a good electrode microstructure and affects the battery performance. The threshold of the slurry particle size distribution index for sodium-ion batteries is between 0.15 and 0.3. If it exceeds this range, it may affect the insertion and extraction processes of sodium ions in the electrode, resulting in problems such as rapid capacity decay and poor rate performance of the battery. For solid-state batteries, due to higher requirements for the uniformity and stability of the electrode slurry, the threshold of its slurry particle size distribution index is between 0.1 and 0.2, and it is preferably around 0.15. If the slurry particle size distribution index is higher than 0.2, it may cause poor interfacial contact between the solid electrolyte and the electrode material, increase the interfacial resistance, and seriously affect the overall performance and safety of the battery.

[0124] It can be understood that according to the particle packing theory, when the particle size distribution is relatively uniform, that is, the polydispersity index is relatively low, the particles can be packed more closely and regularly, and the porosity of the formed electrode structure is more uniform, which is beneficial to the transport and diffusion of lithium ions, sodium ions, etc. in the electrode material, thereby improving the charge-discharge performance and cycle stability of the battery. On the contrary, if the polydispersity index is too high and the particle size difference is large, it will cause the voids between large particles to be insufficiently filled by small particles, forming an uneven pore structure and hindering ion transport. During the charge-discharge process of the battery, the interfacial interaction between the electrode material and the electrolyte or solid electrolyte is crucial. The electrode slurry with an appropriate polydispersity index can form a more uniform and stable interface between the active material and the electrolyte after forming the electrode, reduce the interfacial resistance, and is beneficial to the migration and charge transfer of ions at the interface. If the polydispersity index exceeds the reasonable range, the interface structure will be uneven and the local interfacial resistance will increase, affecting the overall performance of the battery.

[0125] Numerous scientific research institutions and battery manufacturing enterprises have conducted performance tests on electrode slurries with different dispersity indices through a large number of experimental studies. For example, in the research of lithium-ion batteries, experiments were carried out to fabricate electrodes and assemble batteries using lithium iron phosphate cathode slurries with polydispersity indices of 0.15, 0.25, and 0.35 respectively, and then conduct charge-discharge cycle tests. The results showed that after 100 cycles, the capacity retention rates of the batteries with polydispersity indices of 0.15 and 0.25 were 95% and 90% respectively, while the capacity retention rate of the battery with a polydispersity index of 0.35 was only 80%. Specifically, for example, in the research published online in the journal *ACS Applied Electronic Materials* on August 1, 2023 by researchers from Tokyo University of Science in Japan, a rheometer was combined with a spectrometer device, using methyl cellulose as a dispersant to measure the electrochemical impedance of acetylene black slurry, conducting experiments under the influence of shear stress at different frequencies to obtain a rheological impedance spectrum, and developing an equivalent circuit model. The experiment found that the bulk resistance of acetylene black was independent of the shear rate but decreased with the increase in the concentration of methyl cellulose, and the resistance measured at each methyl cellulose concentration increased with the increase in the shear rate. In the research *Study on the Dispersibility Characterization of Lithium Battery Conductive Slurries*, conductive slurries (conductive carbon black and carbon nanotubes) were used as the research object, and nuclear magnetic resonance technology was used as a tool to quantitatively evaluate conductive slurries with different degrees of dispersion by measuring the relaxation time and relaxation spectrum of the conductive slurries. Three types of conductive carbon black particles with a specific surface area of 62 - 67 m² / g and three types of carbon nanotube powders with a specific surface area between 90 - 260 m² / g were used in the experiment, revealing significant differences in the slurry dispersibility of carbon black particles and carbon nanotube materials. The review article *Conveying Advanced Li‐ion Battery Materials into Practice The Impact of Electrode Slurry Preparation Skills* summarized the preparation techniques of advanced lithium-ion battery electrode slurries and their impact on electrode morphology and performance. It was pointed out in the article that surfactants were beneficial for the dispersion of aggregates by reducing the contact angle between the particle surface and the slurry solvent, etc.; experimental contents such as the surfactant-assisted stirring process (SIC process) were also introduced, such as experiments of mixing highly aspect ratio conductive agents (carbon nanotubes, CNT) with binder solutions (polyacrylic acid, PAA), to prove the impact of relevant processes on slurry dispersion and electrode performance.

[0126] Specifically, according to the information of the particle size distribution curve, the particle size distribution coefficient is obtained, specifically including:

[0127] According to the particle size distribution curve information, obtain the particle size proportion information, where the particle size proportion information represents the proportion information of each particle size in the electrode mixing slurry;

[0128] According to the particle size proportion information, based on the surface area weighted average particle size calculation formula, obtain the calibrated particle size information;

[0129] Take the average value of the first characteristic particle size and the third characteristic particle size as the characteristic particle size;

[0130] Sort the calibrated particle size, the characteristic particle size, and the second characteristic particle size in ascending order of particle size value to obtain the particle size order information, where the particle size order information includes the first intermediate particle size, the second intermediate particle size, and the third intermediate particle size;

[0131] According to the particle size order information, obtain the particle size distribution coefficient;

[0132] Among them, the particle size distribution coefficient is specifically:

[0133] ;

[0134] In the formula, is the particle size distribution coefficient, , and are the first intermediate particle size, the second intermediate particle size, and the third intermediate particle size respectively, is the first characteristic particle size, is the second characteristic particle size, is the third characteristic particle size, is the surface area weighted average particle size, represents the particle size value of the i-th kind of particle, represents the proportion of the particle size value of the i-th kind of particle, max represents the maximum value, min represents the minimum value, and mid represents the intermediate value.

[0135] In this solution, through the particle size proportion information, based on the surface area weighted average particle size calculation formula, obtain the calibrated particle size, sort the calibrated particle size, the characteristic particle size, and the second characteristic particle size in ascending order of particle size value to obtain the particle size order information, that is, take the minimum value among the three data as the first intermediate particle size, the maximum value as the third intermediate particle size, and the remaining one as the second intermediate particle size, and obtain the particle size distribution coefficient through the particle size order information;

[0136] It can be understood that the calibrated particle size, that is, the surface area weighted average particle size, and the materials in the electrode mixing slurry often involve various powders (such as conductive agents, active materials, binders, etc.), and their performance is closely related to the performance of the final battery. The reactivity, ion conductivity, etc. of the electrode material are all related to the specific surface area of the material. Use It can more accurately reflect the influence of particles in the slurry on these properties. The characteristic particle size represents the median value of the slurry particle size, and the second characteristic particle size represents the median value of the slurry particle size. These three pieces of data all reflect the average particle size of the slurry from different aspects, but differences among the three are caused by factors such as mixing settings. Through the particle size distribution coefficient, the differences among the three are evaluated. In this solution, if only the polydispersity index is used to analyze the particle size distribution of the slurry, the complexity of the distribution state cannot be described, and it is greatly affected by extreme particles. Therefore, through the particle size distribution coefficient, the particle size distribution of the slurry is further corrected to ensure the accuracy and stability of the data.

[0137] Specifically, the viscosity and conductivity of the electrode mixed slurry are detected to determine whether the electrode mixed slurry meets the production standards, which specifically includes:

[0138] According to the slurry particle size distribution index and the slurry particle size distribution index threshold, the slurry mixing uniformity coefficient is obtained;

[0139] According to the slurry mixing uniformity coefficient, detection points are set for the electrode mixed slurry to obtain detection point information;

[0140] Based on the detection point information, the viscosity and conductivity of the electrode mixed slurry are detected to obtain the slurry detection data for each point. The slurry detection data includes slurry viscosity data and slurry conductivity data;

[0141] According to the battery electrode material information and the electrode auxiliary material information, based on production process analysis, the slurry viscosity threshold and the slurry conductivity threshold are obtained. Both the slurry viscosity threshold and the slurry conductivity threshold are range thresholds;

[0142] According to the slurry detection data, the slurry viscosity threshold, and the slurry conductivity threshold, it is determined whether the viscosity and conductivity of the electrode mixed slurry meet the production standards. If not, the types and feeding ratios of the battery electrode materials and the electrode auxiliary materials are adjusted. If so, according to the electrode mixed slurry information, the battery substrate is coated to obtain the battery electrode sheet;

[0143] Among them, if the slurry mixing uniformity coefficient , detection points are set at the center of the axis of the electrode mixed slurry, 1 cm above the bottom of the electrode mixed slurry on the central axis, and 1 cm below the top of the electrode mixed slurry on the central axis;

[0144] If , detection points are set at 1 / 4, 1 / 2, and 3 / 4 of the depth of the electrode mixed slurry, and at 1 / 3 and 2 / 3 of the radius at the same depth of the electrode mixed slurry;

[0145] ;

[0146] Where T is the slurry mixing uniformity coefficient, represents the slurry particle size distribution index, and are the thresholds of the slurry particle size distribution index.

[0147] In this solution, by means of the slurry mixing uniformity coefficient, detection points are set for the electrode mixed slurry, and the detection point information is obtained. By dynamically adjusting the number of detection points, the detection efficiency is greatly improved, and the accuracy of detection is ensured at the same time. Based on the detection point information, the viscosity and conductivity of the electrode mixed slurry are detected to obtain the slurry detection data of each point. According to the slurry detection data, the slurry viscosity threshold and the slurry conductivity threshold, it is judged whether the viscosity and conductivity of the electrode mixed slurry meet the production standards;

[0148] It can be understood that when the polydispersity index is relatively low within the threshold range, it means that the particle size distribution of each component in the slurry is more concentrated and uniform. During the preparation process of electrodes such as coating, it can make the active material, conductive agent, etc. more evenly distributed, so that the electrodes are more consistent in microstructure. In this way, during the charge and discharge process of the battery, the reaction consistency at each part of the electrode is higher, the performance such as the charge and discharge efficiency and capacity of the battery is more stable, and the performance difference between batches is also smaller, which is beneficial to improving the yield and overall quality stability of battery products. A lower polydispersity index can make the interface formed when the electrode slurry contacts the current collector and electrolyte more uniform and stable. Taking a lithium-ion battery as an example, this helps the lithium ions to be transmitted more smoothly and evenly at the electrode / electrolyte interface, reduces the lithium ion transmission barrier caused by the interface unevenness, reduces the interface resistance, and further improves the overall performance and cycle life of the battery. Therefore, within the threshold of the slurry particle size distribution index, the lower the slurry particle size distribution index, the better the slurry uniformity, and at this time, the fewer the detection point requirements for viscosity detection and conductivity detection. For example, when the container of the electrode mixed slurry is cylindrical, if the overall uniformity of the electrode mixed slurry is good, a small number of detection points can be selected at typical positions such as the middle of the slurry, such as at the 1 / 2 position of the height and radius of the container. If the uniformity is poor, multi-point detection is required at different height and radius positions, such as setting detection points at 1 / 4, 1 / 2, and 3 / 4 of the container height, and at 1 / 3 and 2 / 3 of the radius, to comprehensively understand the slurry characteristics;

[0149] Therefore, further, for a cylindrical slurry barrel, points can be set at different heights near the barrel wall and on the central axis. For a square slurry tank, detection points can be selected at the four corners, the center, and the midpoints of each side. For a large storage tank, due to the large amount of slurry, more detection points need to be set at different height levels and different radial positions, and a grid-like distribution of detection points can be adopted. For containers with special structures such as stirring paddles, in addition to setting points on the container body, points also need to be set near the stirring paddle and at the edge of the area swept by the paddle blade to detect the influence of stirring on the slurry properties.

[0150] In this embodiment, different viscosity thresholds and conductivity thresholds are set according to different battery types. For lithium-ion batteries, the viscosity of the negative electrode slurry is between 1000 and 3000 cP (centipoise). Graphite materials or other negative electrode active materials are often used for the negative electrode slurry. Moderate viscosity can ensure good coating performance and help form a uniform electrode. The viscosity of the positive electrode slurry usually needs to be between 2000 and 5000 cP, and the viscosity range of the sodium-ion battery slurry is 2000 - 6000 cP. The viscosity of the lead-acid battery slurry is usually relatively high, with a viscosity range between 3000 and 8000 cP. The viscosity requirement for the zinc-air battery slurry is generally low, between 1000 and 2000 cP. The conductivity of the negative electrode slurry of lithium-ion batteries is 10 S / m to 50 S / m, and the conductivity of the positive electrode slurry is 30 S / m to 80 S / m. The conductivity of the sodium-ion battery slurry is between to , that is, about 0.1 S / m to 1 S / m. The conductivity of lead-acid batteries is relatively high, between 50 S / m and 200 S / m. Because the sulfuric acid electrolyte of lead-acid batteries itself has good conductivity, when mixed with lead paste, etc. to form a slurry, the conductivity also remains at a relatively high level. The conductivity of the zinc-air battery slurry is in the order of 100 mS / cm to 300 mS / cm, that is, about 1 S / m to 3 S / m.

[0151] Specifically, according to the information of the electrode mixed slurry, the battery substrate is coated to obtain a battery electrode sheet, which specifically includes:

[0152] Obtain historical battery production data, where the historical battery production data includes historical battery production material information and historical battery parameter information;

[0153] Based on the battery substrate material and the battery electrode material, screen the historical battery production data to obtain battery production reference data, where the battery production reference data represents the historical battery production data corresponding to the batteries produced with the same battery substrate material and battery electrode material in the historical battery production data;

[0154] According to the battery production reference data, obtain historical electrode sheet thickness data, battery capacity data, and battery charge and discharge efficiency information;

[0155] Based on the battery application requirements, set weights for the battery capacity and the battery charge and discharge efficiency respectively;

[0156] According to the set weights, battery capacity data, and battery charge and discharge efficiency information, obtain the battery performance index;

[0157] Based on the historical electrode sheet thickness data, take the electrode sheet thickness corresponding to the maximum value of the battery performance index as the optimal thickness of the electrode sheet;

[0158] Coat the battery substrate according to the optimal thickness of the electrode sheet to obtain the battery electrode sheet;

[0159] The battery performance index is as follows:

[0160] ;

[0161] In the formula, S is the battery performance index, is the weight of the battery capacity, C is the battery capacity, is the weight of the battery charge-discharge efficiency, is the battery charge-discharge efficiency.

[0162] In this solution, based on the battery substrate material and the battery electrode material, screen the historical battery production data, screen out the historical battery data that is the same as the material of the battery to be produced, by setting weights for the battery capacity and the battery charge-discharge efficiency respectively, according to the set weights, battery capacity data and battery charge-discharge efficiency information, obtain the battery performance index, and based on the historical electrode sheet thickness data, take the electrode sheet thickness corresponding to the maximum value of the battery performance index as the optimal thickness of the electrode sheet.

[0163] It can be understood that different types of batteries and design requirements may vary. The coating thickness will affect the battery capacity. If it is too thin, the capacity will be insufficient. If it is too thick, it may affect the battery charge-discharge efficiency and even increase the internal resistance. Therefore, different weights are set for the battery capacity and the charge-discharge efficiency according to the actual application scenario of the battery. In this embodiment, , 。

[0164] Detect the thickness of the electrode sheet according to the battery electrode sheet to obtain the electrode sheet thickness data;

[0165] Judge whether the electrode sheet thickness meets the production standard according to the electrode sheet thickness data. If not, adjust the electrode sheet thickness. If so, package and inject electrolyte into the electrode sheet to obtain the basic battery;

[0166] Activate the basic battery and obtain the battery test data based on the charge-discharge test;

[0167] Judge whether the basic battery meets the production standard according to the battery test data. If not, adjust the basic battery until the reference battery meets the production standard. If so, the basic battery is qualified.

[0168] Specifically, judging whether the electrode sheet thickness meets the production standard according to the electrode sheet thickness data specifically includes:

[0169] Obtain the maximum thickness and the minimum thickness of the electrode sheet according to the electrode sheet thickness data;

[0170] Take the difference between the maximum thickness and the minimum thickness of the electrode sheet as the thickness difference value of the electrode sheet;

[0171] Obtain the nearest thickness of the electrode sheet;

[0172] Take the ratio of the thickness difference value of the electrode sheet to the nearest thickness of the electrode sheet as the thickness uniformity index of the electrode sheet;

[0173] Based on the electrode sheet thickness difference standard, judge whether the electrode sheet thickness meets the production standard according to the electrode sheet thickness uniformity index. If not, adjust the electrode sheet thickness. If so, obtain the battery separator information according to the battery base material information;

[0174] Package the battery according to the battery electrode sheet and the battery separator to obtain the packaged battery;

[0175] Obtain the battery electrolyte information according to the battery electrode material information and the electrode auxiliary material information;

[0176] Based on the battery electrolyte information, inject the packaged battery to obtain the basic battery;

[0177] Activate the basic battery, and based on the charge and discharge test, obtain the battery test data, where the battery test data includes the battery charging time, the battery discharging time, and the battery capacity;

[0178] Obtain the battery capacity information and the battery charge and discharge efficiency information according to the battery test data;

[0179] Based on the battery design standard, obtain the battery capacity threshold and the battery charge and discharge efficiency threshold;

[0180] Judge whether the basic battery meets the production standard according to the battery capacity, the battery charge and discharge efficiency, the battery capacity threshold, and the battery charge and discharge efficiency threshold. If not, adjust the basic battery until the reference battery meets the production standard. If so, the basic battery is qualified.

[0181] In this solution, by taking the ratio of the thickness difference value of the electrode sheet to the nearest thickness of the electrode sheet as the thickness uniformity index of the electrode sheet, based on the electrode sheet thickness difference standard, judge whether the electrode sheet thickness meets the production standard according to the electrode sheet thickness uniformity index, activate the basic battery, and based on the charge and discharge test, obtain the battery test data. Judge whether the basic battery meets the production standard according to the battery capacity, the battery charge and discharge efficiency, the battery capacity threshold, and the battery charge and discharge efficiency threshold. If the basic battery does not meet the production standard, analyze the problems of the basic battery according to the battery test data, and adjust the basic battery according to the analysis results;

[0182] It is understandable that during the coating process, the distribution of the electrode material should be uniform, and there should be no obvious thickness difference or uneven coating on the surface. The uniform thickness of the electrode sheet can ensure the same capacity of each battery cell, improving the performance and lifespan of the battery. In this embodiment, the threshold value of the electrode sheet thickness uniformity index is 0.04. If the electrode sheet thickness uniformity index is less than or equal to 0.04, the electrode sheet thickness meets the production standard. Through the battery design data, the designed battery capacity is obtained. According to the designed battery capacity, the battery capacity threshold is obtained. If the measured battery capacity is greater than or equal to 90% of the designed capacity, the battery capacity is qualified. The battery charge-discharge efficiency threshold is 85%.

[0183] Referring Figure 5 as shown, further, in combination with the above-mentioned intelligent control method for battery production based on multi-source data, an intelligent control system for battery production based on multi-source data is proposed, including:

[0184] A main control module, which is used to detect the electrode mixed slurry, judge whether it meets the production standard, judge whether the electrode sheet thickness meets the production standard according to the electrode sheet thickness data, judge whether the basic battery meets the production standard according to the battery test data, obtain the particle size distribution curve information according to the particle size distribution information of the mixed slurry, obtain the first characteristic particle size, the second characteristic particle size and the third characteristic particle size according to the particle size distribution curve information, obtain the particle size proportion information according to the particle size distribution curve information, obtain the calibrated particle size information based on the surface area weighted average particle size calculation formula according to the particle size proportion information, set the detection points for the electrode mixed slurry according to the slurry mixing uniformity coefficient, and obtain the detection point information;

[0185] An information acquisition module, which is used to acquire the battery base material information, the battery substrate material information, the battery electrode material information and the historical battery production data, obtain the electrode auxiliary material information, the binder information and the conductive additive information based on the battery production process design according to the battery base material information, conduct particle size distribution detection on the electrode mixed slurry to obtain the particle size distribution information of the mixed slurry, conduct viscosity detection and conductivity detection on the electrode mixed slurry to obtain the slurry detection data, detect the electrode sheet thickness according to the battery electrode sheet to obtain the electrode sheet thickness data, activate the basic battery, and obtain the battery test data based on the charge-discharge test;

[0186] An evaluation module, which is used to obtain a polydispersity index based on a particle size distribution width calculation formula according to a first characteristic particle size, a second characteristic particle size, and a third characteristic particle size, obtain a particle size distribution coefficient according to particle size distribution curve information, obtain a slurry particle size distribution index according to the polydispersity index and the particle size distribution coefficient, obtain a slurry mixing uniformity coefficient according to the slurry particle size distribution index and a slurry particle size distribution index threshold, obtain a battery performance index according to set weights, battery capacity data, and battery charge and discharge efficiency information, and use the ratio of the electrode sheet thickness difference value to the nearest thickness of the electrode sheet as the electrode sheet thickness uniformity index;

[0187] A display module, which interacts with the main control module and is used to output and display slurry particle size distribution information, slurry particle size distribution index, slurry detection data, and battery test data, and set weights for battery capacity and battery charge and discharge efficiency.

[0188] The main control module specifically includes:

[0189] A control unit, which is used to obtain particle size distribution curve information according to slurry particle size distribution information, obtain a first characteristic particle size, a second characteristic particle size, and a third characteristic particle size according to the particle size distribution curve information, obtain particle size proportion information according to the particle size distribution curve information, obtain calibrated particle size information based on a surface area weighted average particle size calculation formula according to the particle size proportion information, set detection points for the electrode mixing slurry according to the slurry mixing uniformity coefficient, and obtain detection point information;

[0190] An information receiving unit, which interacts with the information acquisition module and the evaluation module and is used to receive data and transmit it to the judgment unit;

[0191] A judgment unit, which is used to detect the electrode mixing slurry, judge whether it meets the production standard, judge whether the electrode sheet thickness meets the production standard according to the electrode sheet thickness data, and judge whether the basic battery meets the production standard according to the battery test data.

[0192] The information acquisition module specifically includes:

[0193] A first acquisition unit, which is used to acquire battery basic material information, battery substrate material information, battery electrode material information, and historical battery production data, and acquire electrode auxiliary material information, binder information, and conductive additive information based on battery production process design according to the battery basic material information;

[0194] A second acquisition unit, which is configured to perform particle size distribution detection on the electrode mixed paste to obtain the particle size distribution information of the mixed paste, perform viscosity detection and conductivity detection on the electrode mixed paste to obtain the paste detection data, detect the thickness of the electrode sheet according to the battery electrode sheet to obtain the electrode sheet thickness data, activate the basic battery, and obtain the battery test data based on the charge and discharge test.

[0195] An evaluation module, specifically including:

[0196] A first evaluation unit, which is configured to obtain the polydispersity index based on the first characteristic particle size, the second characteristic particle size, and the third characteristic particle size according to the particle size distribution width calculation formula, obtain the particle size distribution coefficient according to the particle size distribution curve information, and obtain the paste particle size distribution index according to the polydispersity index and the particle size distribution coefficient;

[0197] A second evaluation unit, which is configured to obtain the paste mixing uniformity coefficient according to the paste particle size distribution index and the paste particle size distribution index threshold, obtain the battery performance index according to the set weight, battery capacity data, and battery charge and discharge efficiency information, and use the ratio of the electrode sheet thickness difference value to the nearest thickness of the electrode sheet as the electrode sheet thickness uniformity index.

[0198] In summary, the advantages of the present invention are as follows. The paste particle size distribution index is obtained through the polydispersity index and the particle size distribution coefficient. The particle size distribution condition of the electrode mixed paste is accurately evaluated through the paste particle size distribution index to ensure the uniformity of the paste. The detection points of the electrode mixed paste are set through the paste mixing uniformity coefficient to obtain the detection point information, realizing the dynamic setting of the detection points, improving the detection efficiency while ensuring the detection accuracy. The optimal thickness of the electrode sheet is obtained through the battery performance index, and the maximum production quality of the battery is ensured through the optimal thickness of the electrode sheet. The stability and reliability of the battery quality are ensured through the battery test data.

[0199] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the principles described in the specification are only the principles of the present invention. Without departing from the spirit and scope of the present invention, various changes and improvements will occur to the present invention, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A battery production intelligent management and control method based on multi-source data, characterized in that: include: Acquire battery basic material information, wherein the battery basic material information includes battery substrate material information and battery electrode material information; According to the battery basic material information and based on the battery production process design, the electrode auxiliary material information is obtained, wherein the electrode auxiliary material information includes binder information and conductive additive information; According to the battery electrode material information and the electrode auxiliary material information, based on material mixing, an electrode mixed slurry is obtained; Based on the mixing uniformity analysis, the electrode mixed slurry is tested to determine whether it meets the production standards. If not, the proportion of battery electrode materials and electrode auxiliary materials and the material mixing settings are adjusted until the electrode mixed slurry meets the production standards. If so, the battery substrate is coated according to the electrode mixed slurry information to obtain the battery electrode sheet; According to the battery electrode sheet, the electrode sheet thickness is detected to obtain the electrode sheet thickness data; According to the electrode sheet thickness data, determine whether the electrode sheet thickness meets the production standard. If not, adjust the electrode sheet thickness. If yes, package and inject liquid into the electrode sheet to obtain a basic battery. Activate the basic battery and obtain battery test data based on charge and discharge tests; According to the battery test data, determine whether the basic battery meets the production standards. If not, adjust the basic battery until the benchmark battery meets the production standards. If yes, the basic battery is qualified; The mixing uniformity analysis is based on testing the electrode mixed slurry to determine whether it meets the production standards, specifically including: Based on the mixing uniformity analysis, the particle size distribution of the electrode mixed slurry is tested to obtain the particle size distribution information of the mixed slurry; According to the mixed slurry particle size distribution information, the particle size distribution curve information is obtained, wherein the particle size distribution curve indicates the proportion of particles of different particle sizes in the electrode mixed slurry; According to the particle size distribution curve information, a first characteristic particle size, a second characteristic particle size and a third characteristic particle size are obtained; Wherein, 90% of the particles in the electrode mixed slurry have a particle size smaller than the first characteristic particle size, 50% of the particles in the electrode mixed slurry have a particle size smaller than the second characteristic particle size, and 10% of the particles in the electrode mixed slurry have a particle size smaller than the third characteristic particle size; According to the first characteristic particle size, the second characteristic particle size and the third characteristic particle size, based on a particle size distribution width calculation formula, a polydispersity index is obtained; According to the particle size distribution curve information, the particle size distribution coefficient is obtained; According to the polydispersity index and the particle size distribution coefficient, the particle size distribution index of the slurry is obtained; According to the battery electrode material information and based on the material property analysis, the slurry particle size distribution index threshold is obtained; According to the slurry particle size distribution index and the slurry particle size distribution index threshold, it is judged whether the particle size distribution of the electrode mixed slurry meets the production standard; If the particle size distribution of the electrode mixed slurry does not meet the production standards, the material mixing settings are adjusted. If the slurry particle size distribution index still does not meet the production standards after the material mixing settings are adjusted, the proportion of the battery electrode material and the electrode auxiliary material is adjusted until the electrode mixed slurry meets the production standards. The material mixing settings include mixing time, mixing speed and mixing temperature; If the particle size distribution of the electrode mixed slurry meets the production standards, the viscosity and conductivity tests are performed on the electrode mixed slurry to determine whether the electrode mixed slurry meets the production standards. If not, the types and proportions of the battery electrode materials and electrode auxiliary materials are adjusted. If yes, the battery substrate is coated according to the electrode mixed slurry information to obtain the battery electrode sheet. Among them, if the slurry particle size distribution index conform to , then the particle size distribution of the electrode mixed slurry meets the production standards. or , then the particle size distribution of the electrode mixed slurry does not meet the production standards. and is the slurry particle size distribution index threshold; The calculation formula of the slurry particle size distribution index is: ; In the formula, represents the slurry particle size distribution index, is the first characteristic granularity, is the second characteristic granularity, is the third characteristic particle size, is the particle size distribution coefficient; The step of obtaining the particle size distribution coefficient according to the particle size distribution curve information specifically includes: According to the particle size distribution curve information, the particle size ratio information is obtained, where the particle size ratio information represents the ratio information of each particle size in the electrode mixed slurry; According to the particle size ratio information, based on the surface area weighted average particle size calculation formula, the calibration particle size information is obtained; The average value of the first characteristic particle size and the third characteristic particle size is taken as the characteristic particle size; Sorting the calibrated particle size, the characteristic particle size and the second characteristic particle size in ascending order of particle size values ​​to obtain particle size sequence information, wherein the particle size sequence information includes a first intermediate particle size, a second intermediate particle size and a third intermediate particle size; According to the particle size order information, the particle size distribution coefficient is obtained; Wherein, the particle size distribution coefficient is specifically: ; In the formula, is the particle size distribution coefficient, , and are the first intermediate particle size, the second intermediate particle size and the third intermediate particle size, respectively. is the first characteristic granularity, is the second characteristic granularity, is the third characteristic particle size, is the surface area weighted average particle size, represents the particle size value of the i-th particle, It represents the ratio of the particle size value of the i-th particle, max represents the maximum value, min represents the minimum value, and mid represents the middle value; The viscosity test and the conductivity test of the electrode mixed slurry are performed to determine whether the electrode mixed slurry meets the production standards, specifically including: According to the slurry particle size distribution index and the slurry particle size distribution index threshold, the slurry mixing uniformity coefficient is obtained; According to the slurry mixing uniformity coefficient, detection points are set for the electrode mixed slurry to obtain detection point information; Based on the detection point information, viscosity detection and conductivity detection are performed on the electrode mixed slurry to obtain slurry detection data at each point, wherein the slurry detection data includes slurry viscosity data and slurry conductivity data; According to the battery electrode material information and the electrode auxiliary material information, based on the production process analysis, the slurry viscosity threshold and the slurry conductivity threshold are obtained, and the slurry viscosity threshold and the slurry conductivity threshold are both range thresholds; According to the slurry test data, the slurry viscosity threshold and the slurry conductivity threshold, it is judged whether the viscosity and conductivity of the electrode mixed slurry meet the production standards. If not, the types and proportions of the battery electrode materials and electrode auxiliary materials are adjusted. If yes, the battery substrate is coated according to the electrode mixed slurry information to obtain the battery electrode sheet; Among them, if the slurry mixing uniformity coefficient , detection points are set at the center of the central axis of the electrode mixed slurry, 1 cm above the bottom of the electrode mixed slurry on the central axis, and 1 cm below the top of the electrode mixed slurry on the central axis; like , then detection points are set at 1 / 4, 1 / 2, and 3 / 4 of the depth of the electrode mixed slurry, and at 1 / 3 and 2 / 3 of the radius of the same depth of the electrode mixed slurry; ; Where T is the slurry mixing uniformity coefficient, represents the slurry particle size distribution index, and is the threshold value of slurry particle size distribution index.

2. The method for intelligent battery production management and control based on multi-source data according to claim 1, characterized in that: The method of coating the battery substrate according to the electrode mixed slurry information to obtain the battery electrode sheet specifically includes: Acquire historical battery production data, wherein the historical battery production data includes historical battery production material information and historical battery parameter information; Based on the battery substrate material and the battery electrode material, the historical battery production data is screened to obtain the battery production reference data, wherein the battery production reference data represents the historical battery production data corresponding to the batteries produced with the same battery substrate material and battery electrode material in the historical battery production data; Based on the battery production reference data, obtain historical electrode sheet thickness data, battery capacity data and battery charge and discharge efficiency information; Based on the battery application requirements, weights are set for battery capacity and battery charge and discharge efficiency respectively; Obtain the battery performance index based on the set weight, battery capacity data, and battery charge and discharge efficiency information; Based on the historical electrode sheet thickness data, the electrode sheet thickness corresponding to the maximum value of the battery performance index is used as the optimal electrode sheet thickness; According to the optimal thickness of the electrode sheet, the battery substrate is coated to obtain the battery electrode sheet; The battery performance index is: ; Where S is the battery performance index, is the weight of battery capacity, C is the battery capacity, is the weight of battery charging and discharging efficiency, It is the battery charging and discharging efficiency.

3. The method for intelligent battery production management and control based on multi-source data according to claim 1, characterized in that: The step of judging whether the electrode sheet thickness meets the production standard according to the electrode sheet thickness data specifically includes: According to the electrode sheet thickness data, the maximum thickness of the electrode sheet and the minimum thickness of the electrode sheet are obtained; The difference between the maximum thickness of the electrode sheet and the minimum thickness of the electrode sheet is taken as the electrode sheet thickness difference value; Get the latest thickness of the electrode sheet; The ratio of the electrode sheet thickness difference value to the electrode sheet's closest thickness is used as the electrode sheet thickness uniformity index; Based on the electrode sheet thickness difference standard and the electrode sheet thickness uniformity index, determine whether the electrode sheet thickness meets the production standard. If not, adjust the electrode sheet thickness. If yes, obtain the battery separator information based on the battery basic material information. Packaging the battery according to the battery electrode sheets and the battery separator to obtain a packaged battery; Obtaining battery electrolyte information according to battery electrode material information and electrode auxiliary material information; Based on the battery electrolyte information, the packaged battery is injected with electrolyte to obtain a basic battery; Activate the basic battery and obtain battery test data based on the charge and discharge test, wherein the battery test data includes battery charging time, battery discharging time and battery capacity; According to the battery test data, obtain the battery capacity information and battery charge and discharge efficiency information; Based on the battery design standard, obtain the battery capacity threshold and the battery charge and discharge efficiency threshold; According to the battery capacity, battery charge and discharge efficiency, battery capacity threshold and battery charge and discharge efficiency threshold, it is judged whether the basic battery meets the production standards. If not, the basic battery is adjusted until the benchmark battery meets the production standards. If so, the basic battery is qualified.

4. A battery production intelligent management and control system based on multi-source data, used to implement the management and control method according to any one of claims 1 to 3, characterized in that: include: A main control module, wherein the main control module is used to detect the electrode mixed slurry to determine whether it meets the production standards, determine whether the electrode sheet thickness meets the production standards based on the electrode sheet thickness data, determine whether the basic battery meets the production standards based on the battery test data, obtain the particle size distribution curve information based on the mixed slurry particle size distribution information, obtain the first characteristic particle size, the second characteristic particle size and the third characteristic particle size based on the particle size distribution curve information, obtain the particle size ratio information based on the particle size ratio information, obtain the calibrated particle size information based on the surface area weighted average particle size calculation formula, set the detection point for the electrode mixed slurry according to the slurry mixing uniformity coefficient, and obtain the detection point information; An information acquisition module, wherein the information acquisition module is used to acquire battery basic material information, battery substrate material information, battery electrode material information and historical battery production data, acquire electrode auxiliary material information, adhesive information and conductive additive information based on battery production process design according to battery basic material information, perform particle size distribution detection on electrode mixed slurry to acquire mixed slurry particle size distribution information, perform viscosity detection and conductivity detection on electrode mixed slurry to acquire slurry detection data, detect electrode sheet thickness according to battery electrode sheet to acquire electrode sheet thickness data, activate basic battery, and acquire battery test data based on charge and discharge test; An evaluation module, the evaluation module is used to obtain a polydispersity index based on a particle size distribution width calculation formula according to the first characteristic particle size, the second characteristic particle size and the third characteristic particle size, obtain a particle size distribution coefficient according to the particle size distribution curve information, obtain a slurry particle size distribution index according to the polydispersity index and the particle size distribution coefficient, obtain a slurry mixing uniformity coefficient according to the slurry particle size distribution index and the slurry particle size distribution index threshold, obtain a battery performance index according to a set weight, battery capacity data and battery charge and discharge efficiency information, and use the ratio of the electrode sheet thickness difference value to the electrode sheet's most recent thickness as the electrode sheet thickness uniformity index; A display module interacts with the main control module to output and display mixed slurry particle size distribution information, slurry particle size distribution index, slurry detection data and battery test data, and to set weights for battery capacity and battery charge and discharge efficiency.

5. The battery production intelligent management and control system based on multi-source data according to claim 4 is characterized in that: The main control module specifically includes: A control unit, the control unit is used to obtain particle size distribution curve information according to the mixed slurry particle size distribution information, obtain the first characteristic particle size, the second characteristic particle size and the third characteristic particle size according to the particle size distribution curve information, obtain particle size ratio information according to the particle size distribution curve information, obtain calibrated particle size information based on the particle size ratio information and the surface area weighted average particle size calculation formula, set detection points for the electrode mixed slurry according to the slurry mixing uniformity coefficient, and obtain detection point information; An information receiving unit, which interacts with the information acquisition module and the evaluation module to receive data and transmit it to the judgment unit; The judgment unit is used to detect the electrode mixed slurry to determine whether it meets the production standards, determine whether the electrode sheet thickness meets the production standards based on the electrode sheet thickness data, and determine whether the basic battery meets the production standards based on the battery test data.

6. The battery production intelligent management and control system based on multi-source data according to claim 4 is characterized in that: The information acquisition module specifically includes: A first acquisition unit, the first acquisition unit is used to acquire battery basic material information, battery substrate material information, battery electrode material information and historical battery production data, and acquire electrode auxiliary material information, adhesive information and conductive additive information based on the battery basic material information and battery production process design; The second acquisition unit is used to perform particle size distribution detection on the electrode mixed slurry, obtain the mixed slurry particle size distribution information, perform viscosity detection and conductivity detection on the electrode mixed slurry, obtain slurry detection data, detect the electrode sheet thickness according to the battery electrode sheet, obtain the electrode sheet thickness data, activate the basic battery, and obtain the battery test data based on the charge and discharge test.

7. The battery production intelligent management and control system based on multi-source data according to claim 4 is characterized in that: The evaluation module specifically includes: A first evaluation unit, the first evaluation unit is used to obtain a polydispersity index based on a particle size distribution width calculation formula according to the first characteristic particle size, the second characteristic particle size and the third characteristic particle size, obtain a particle size distribution coefficient according to the particle size distribution curve information, and obtain a slurry particle size distribution index according to the polydispersity index and the particle size distribution coefficient; The second evaluation unit is used to obtain the slurry mixing uniformity coefficient according to the slurry particle size distribution index and the slurry particle size distribution index threshold, obtain the battery performance index according to the set weight, battery capacity data and battery charge and discharge efficiency information, and use the ratio of the electrode sheet thickness difference value and the electrode sheet's most recent thickness as the electrode sheet thickness uniformity index.

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