Intelligent management and control method and system for battery production based on multi-source data

Abstract

The invention discloses an intelligent management and control method and system for battery production based on multi-source data, and relates to the technical field of battery production processes, and the method comprises the steps: obtaining battery basic material information, designing based on a battery production process according to the battery basic material information, designing based on a battery electrode material information and an electrode auxiliary material information, and based on material mixing. And obtaining electrode mixed slurry. According to the scheme, the uniformity of the slurry is ensured by accurately evaluating the slurry particle size distribution index and the particle size distribution condition of the electrode mixed slurry, the dynamic setting of the detection point position is realized by setting the detection point position for the electrode mixed slurry through the slurry mixing uniformity coefficient, the detection efficiency is improved while the detection accuracy is ensured, and the detection cost is reduced. By setting the optimal thickness of the electrode plate through the battery performance index, the battery production quality maximization is ensured, and the stability and the reliability of the battery quality are ensured through the battery test data.

Description

Technical Field

[0001] The present invention relates to the technical field of battery production technology, and in particular to a battery production intelligent management and control method and system based on multi-source data. Background Art

[0002] Under the background of the global promotion of green energy transformation, the market demand for batteries as key energy storage components has shown explosive growth. From the vigorous development of electric vehicles to the widespread popularity of various portable electronic devices, the application scenarios of batteries are constantly expanding. At the same time, the market has put forward extremely stringent requirements for the performance, quality and safety of batteries. The traditional battery production model is overly dependent on manual experience. When faced with complex and changing production conditions, it is difficult to ensure the consistency and stability of products, resulting in low production efficiency and serious waste of resources. In order to break through these development bottlenecks, the introduction of advanced intelligent management and 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 management and control of battery production. By integrating multi-dimensional information such as process parameter data and quality inspection data generated during the production process, the refined and intelligent management of the entire battery production process can be realized, and the entire battery industry can be promoted to develop in a green, efficient and sustainable direction.

[0003] At present, the management of battery production still has the problem of being unable 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 particle size distribution, viscosity, conductivity, solid content and other indicators of the slurry are tested separately, the testing cost is high and the time cost is large. However, if only a few of the indicators are tested, the uniformity of the slurry cannot be ensured, and an optimal value for the thickness of the electrode sheet cannot be established based on the actual application conditions of the battery, and the battery cannot be accurately tested. Summary of the invention

[0004] In order to solve the above technical problems, a method and system for intelligent control of battery production based on multi-source data are provided. The technical solution solves the problem that it is impossible to accurately analyze the electrode mixed slurry in the battery production process proposed in the above background technology. The uniformity of the electrode mixed slurry greatly affects the performance of the battery. If the particle size distribution, viscosity, conductivity, solid content and other indicators of the slurry are tested separately, the testing cost is high and the time cost is large. However, if only a few of the indicators are tested, the uniformity of the slurry cannot be ensured, and an optimal value for the thickness of the electrode sheet cannot be established according to the actual application conditions of the battery, and the battery cannot be accurately tested.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is: A battery production intelligent management and control method based on multi-source data, comprising: 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; Based on 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 so, the basic battery is qualified.

[0006] Preferably, the electrode mixed slurry is tested based on the mixing uniformity analysis 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 represents 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; Obtaining 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; 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, It 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.

[0007] Preferably, 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.

[0008] Preferably, 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, It represents the slurry particle size distribution index, and is the threshold value of slurry particle size distribution index.

[0009] Preferably, the process of coating the battery substrate according to the electrode mixed slurry information to obtain the battery electrode sheet specifically includes: Acquire battery production process information, wherein the battery production process information includes standard thickness information of electrode sheets; According to the battery production process information, the maximum standard thickness and the minimum standard thickness of the electrode sheet are obtained; 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.

[0010] Preferably, judging whether the thickness of the electrode sheet 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.

[0011] Furthermore, a battery production intelligent management and control system based on multi-source data is proposed to implement the above-mentioned management and control method, including: 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.

[0012] Optionally, 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.

[0013] Optionally, 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.

[0014] Optionally, 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.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention proposes an intelligent control method and system for battery production based on multi-source data. The particle size distribution status of the electrode mixed slurry is accurately evaluated through the slurry particle size distribution index to ensure the uniformity of the slurry. The detection points are set for the electrode mixed slurry through the slurry mixing uniformity coefficient to achieve dynamic setting of the detection points, thereby improving the detection efficiency while ensuring the detection accuracy. The optimal thickness of the electrode sheet is set through the battery performance index to ensure the maximization of the battery production quality. The stability and reliability of the battery quality are ensured through the battery test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a flow chart of a battery production intelligent management and control method based on multi-source data proposed by the present invention; Figure 2 A flow chart for obtaining the slurry particle size distribution index in the present invention; Figure 3 Obtaining a flow chart for the battery electrode sheet in the present invention; Figure 4 A flow chart for obtaining the optimal thickness of the electrode sheet in the present invention; Figure 5 This is a structural block diagram of a battery production intelligent management and control system based on multi-source data proposed by the present invention. DETAILED DESCRIPTION

[0017] 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 described below are only examples, and those skilled in the art may think of other obvious variations.

[0018] Reference Figure 1 - Figure 4 As shown, a battery production intelligent management and control method based on multi-source data in an embodiment of the present invention includes: 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; Specifically, based on the mixing uniformity analysis, the electrode mixed slurry is tested to determine whether it meets the production standards, 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, It 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.

[0019] In this scheme, the particle size distribution of the electrode mixed slurry is detected to obtain the proportion of particles of different particle sizes in the electrode mixed slurry, and the first characteristic particle size, the second characteristic particle size and the third characteristic particle size are obtained through the proportion data. 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, and 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; It is understandable that after determining the electrode material, the positive electrode material (such as lithium cobalt oxide, nickel cobalt cobalt oxide) or negative electrode material (such as graphite, silicon) of the battery is uniformly mixed with a binder (such as polyvinylidene fluoride PVDF) and a conductive additive (such as carbon black) through special mixing equipment (such as planetary mixers, ball mills, etc.), and the mixed material slurry is evenly coated on the base 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. Therefore, the process needs to ensure that all materials are evenly distributed. 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, and conductivity. Among them, the monitoring of 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 and discharge rate of the battery. However, too small a particle size may lead to increased viscosity and uneven coating. Therefore, in this scheme, the particle size distribution is used as a benchmark and extended to other indicators. The particle size distribution should be as narrow as possible. Uniform particle size distribution helps to mix the materials evenly and avoid agglomeration, which leads to unstable battery performance. It should be noted that in particle size distribution detection, the polydispersity index (Span) is a common indicator to measure the width or dispersion of particle distribution. It 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, the slurry particle size distribution index can be used to accurately evaluate the slurry particle size distribution status.

[0020] In this embodiment, the slurry particle size distribution index threshold is set according to the battery electrode material. If it is a lithium-ion battery, the slurry particle size distribution index threshold is between 0.1-0.3, which is ideal. When the slurry particle size distribution index exceeds 0.3, it means that the particle size distribution in the slurry is wide and the particle size difference is large, which will cause the electrode material to be unevenly distributed during the coating process, affecting the performance consistency of the electrode, reducing the battery's charge and discharge efficiency, cycle stability, etc. If the slurry particle size distribution index is less than 0.1, it means that the particle size distribution is too concentrated, and the investment cost is high when preparing the slurry, or in some cases it is not conducive to forming a good electrode microstructure, affecting the battery performance. The slurry particle size distribution index threshold of the sodium ion battery is between 0.15-0.3. If it exceeds this range, the embedding and extraction process of sodium ions in the electrode may be affected, resulting in problems such as faster 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 slurry particle size distribution index threshold is between 0.1-0.2, preferably around 0.15. If the slurry particle size distribution index is higher than 0.2, the interface contact between the solid electrolyte and the electrode material may deteriorate, increase the interface resistance, and seriously affect the overall performance and safety of the battery.

[0021] It is understandable that according to the particle stacking theory, when the particle size distribution is relatively uniform, that is, the polydispersity index is low, the particles can be stacked more tightly and regularly, and the porosity of the electrode structure formed is more uniform, which is conducive to the transmission and diffusion of lithium ions, sodium ions, etc. in the electrode material, thereby improving the charge and 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, the gaps between large particles will be insufficiently filled by small particles, forming an uneven pore structure, hindering ion transmission. During the battery charging and discharging process, the interface interaction between the electrode material and the electrolyte or solid electrolyte is crucial. Electrode slurry with a suitable polydispersity index can form a more uniform and stable interface between the active material and the electrolyte after the electrode is formed, reduce the interface resistance, and facilitate the migration of ions and charge transfer at the interface. If the polydispersity index exceeds the reasonable range, the interface structure will be uneven, the local interface resistance will increase, and the overall performance of the battery will be affected.

[0022] Many scientific research institutions and battery manufacturers have conducted performance tests on electrode slurries with different dispersion indexes through a large number of experimental studies. For example, in the study of lithium-ion batteries, there are experiments in which lithium iron phosphate positive electrode slurries with polydispersity indexes of 0.15, 0.25 and 0.35 are made into electrodes and assembled into batteries for charge and discharge cycle tests. The results show that after 100 cycles, the capacity retention rates of batteries with polydispersity indexes of 0.15 and 0.25 are 95% and 90%, respectively, while the capacity retention rate of batteries with a polydispersity index of 0.35 is only 80%. Specifically, for example, in ACS Applied Electronic Materials: Researchers from Tokyo University of Science in Japan published their research online in this journal on August 1, 2023, combining a rheometer with a spectrometer device, using methyl cellulose as a dispersant, measuring the electrochemical impedance of acetylene black slurry, and conducting experiments under the influence of shear stress at different frequencies to obtain rheological impedance spectra, 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 of methylcellulose concentration. The resistance measured at each methylcellulose concentration increased with the increase of shear rate. "Characterization of Dispersion of Conductive Slurry for Lithium Batteries" takes conductive slurry (conductive carbon black and carbon nanotubes) as the research object, uses nuclear magnetic resonance technology as a tool, and quantitatively evaluates conductive slurries with different degrees of dispersion by measuring the relaxation time and relaxation spectrum of conductive slurries. The experiment used three types of conductive carbon black particles with a specific surface area of ​​62-67m² / g and three types of carbon nanotube powders with a specific surface area between 90-260m² / g, revealing the significant differences in the slurry dispersibility of carbon black particles and carbon nanotube materials. "Conveying Advanced Li-ion Battery Materials into Practice The Impact of Electrode Slurry Preparation Skills" reviews the preparation technology of advanced lithium-ion battery electrode slurries and their impact on electrode morphology and performance. The article points out that surfactants facilitate the dispersion of agglomerates by reducing the contact angle between the particle surface and the slurry solvent. It also introduces experimental contents such as the surfactant-assisted stirring process (SIC process), such as mixing high aspect ratio conductive agents (carbon nanotubes, CNTs) with adhesive solutions (polyacrylic acid, PAA), to demonstrate the influence of related processes on slurry dispersion and electrode performance.

[0023] Specifically, according to the particle size distribution curve information, the particle size distribution coefficient is obtained, which 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.

[0024] In this solution, the calibrated particle size is obtained based on the surface area weighted average particle size calculation formula through the particle size ratio information, and the calibrated particle size, the characteristic particle size and the second characteristic particle size are sorted in order from small to large according to the particle size value to obtain the particle size order information, that is, the minimum value of the three data is used as the first intermediate particle size, the maximum value is used as the third intermediate particle size, and the remaining one is used as the second intermediate particle size. The particle size distribution coefficient is obtained through the particle size order information; It is understandable that the nominal particle size, i.e. the surface area weighted average particle size, is the material in the electrode mixture slurry often involves a variety of powders (such as conductive agents, active materials, adhesives, etc.), and its performance is closely related to the performance of the final battery. The reactivity, ion conductivity and other properties of the electrode material are all related to the specific surface area of ​​the material. It can more accurately reflect the influence of particles in the slurry on these properties, and the characteristic particle size indicates the middle value of the slurry particle size, and the second characteristic particle size indicates the median value of the slurry particle size. These three data reflect the average particle size of the slurry from different levels, but the differences among the three are caused by factors such as mixing settings. The differences among the three are evaluated through the particle size distribution coefficient. In this scheme, if the slurry particle size distribution is only analyzed by the polydispersity index, the complexity of the distribution state cannot be described, and it is greatly affected by extreme particles. Therefore, the particle size distribution coefficient is used to further correct the slurry particle size distribution to ensure the accuracy and stability of the data.

[0025] Specifically, the viscosity and conductivity of the electrode mixed slurry are tested to determine whether the electrode mixed slurry meets the production standards, 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.

[0026] In this scheme, detection points are set for the electrode mixed slurry through the slurry mixing uniformity coefficient, and the detection point information is obtained. The detection efficiency is greatly improved by dynamically adjusting the number of detection points, while ensuring the accuracy of the detection. Based on the detection point information, the viscosity and conductivity of the electrode mixed slurry are tested 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; It is understandable that when the polydispersity index is lower within the threshold range, it means that the particle size distribution of each component in the slurry is more concentrated and uniform. In the electrode preparation process such as coating, the active material, conductive agent, etc. can be more evenly distributed, so that the electrode is more consistent in microstructure. In this way, during the battery charging and discharging process, the reaction consistency of each electrode is higher, the battery's charging and discharging efficiency, capacity performance and other performance are more stable, and the performance difference between batches will be smaller, which is conducive to improving the yield rate and overall quality stability of battery products. The lower polydispersity index can make the interface formed by the electrode slurry when it contacts the current collector and electrolyte more uniform and stable. Taking lithium-ion batteries as an example, this helps lithium ions to transfer more smoothly and evenly at the electrode / electrolyte interface, reduces barriers to lithium ion transfer caused by uneven interfaces, reduces interface resistance, and thus improves the overall performance and cycle life of the battery. Therefore, within the slurry particle size distribution index threshold, the lower the slurry particle size distribution index, the better the slurry uniformity, and the fewer points are needed 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 locations such as the middle of the slurry, such as at 1 / 2 of the container height and radius. If the uniformity is poor, multiple points need to be detected at different heights and radii, such as setting detection points at 1 / 4, 1 / 2, and 3 / 4 of the container height, and 1 / 3 and 2 / 3 of the radius, to fully understand the slurry characteristics; Therefore, further, for cylindrical slurry barrels, points can be set at different heights near the barrel wall and on the central axis. For square slurry tanks, detection points can be selected at the four corners, center and midpoints of each side. For large storage tanks, due to the large amount of slurry, it is necessary to set more detection points at different height levels and different radial positions, and grid-shaped distribution of detection points can be adopted. For containers with special structures such as stirring paddles, in addition to setting points on the main body of the container, points must also be set near the stirring paddle and at the edge of the area swept by the paddle to detect the effect of stirring on the properties of the slurry.

[0027] 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 1000-3000 cP (centipoise). Graphite materials or other negative electrode active materials are often used for negative electrode slurries. Moderate viscosity can ensure good coating properties and help form uniform electrodes. The viscosity of the positive electrode slurry usually needs to be between 2000-5000 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 higher, ranging from 3000-8000 cP. The slurry viscosity requirements of zinc-air batteries are generally lower, between 1000-2000 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 2000-6000 cP. to , which is about 0.1 S / m to 1 S / m. The conductivity of lead-acid batteries is relatively high, ranging from 50 S / m to 200 S / m. Because the sulfuric acid electrolyte of lead-acid batteries has good conductivity itself, when mixed with lead paste to form a slurry, the conductivity is also maintained at a high level. The conductivity of 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.

[0028] Specifically, according to the electrode mixed slurry information, the battery substrate is coated to obtain the battery electrode sheet, which 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.

[0029] In this scheme, the historical battery production data is screened based on the battery substrate material and the battery electrode material to screen out the historical battery data with the same battery material to be produced, and the battery performance index is obtained according to the set weights, battery capacity data and battery charge and discharge efficiency information by setting weights respectively. 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.

[0030] It is understandable that different types of batteries and design requirements may be different. The coating thickness will affect the capacity of the battery. Too thin will lead to insufficient capacity, while too thick may affect the charge and discharge efficiency of the battery and even increase the internal resistance. Therefore, different weights are set for the capacity and charge and discharge efficiency of the battery according to the actual application scenario of the battery. In this embodiment, , .

[0031] 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; Based on 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 so, the basic battery is qualified.

[0032] Specifically, according to the electrode sheet thickness data, it is judged whether the electrode sheet thickness meets the production standards, including: 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.

[0033] In this solution, the ratio of the electrode sheet thickness difference value to the electrode sheet's nearest thickness is used as the electrode sheet thickness uniformity index. Based on the electrode sheet thickness difference standard, the electrode sheet thickness is judged to be in compliance with the production standard according to the electrode sheet thickness uniformity index. The basic battery is activated. Based on the charge and discharge test, the battery test data is obtained. Based on 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 is in compliance with the production standard. If the basic battery does not meet the production standard, the basic battery is analyzed according to the battery test data, and the basic battery is adjusted according to the analysis results. 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 phenomenon on the surface. The uniform thickness of the electrode sheet can ensure the consistent capacity of each battery cell and improve the performance and life of the battery. In this embodiment, the electrode sheet thickness uniformity index threshold 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. The battery design capacity is obtained through the battery design data. According to the battery design capacity, the battery capacity threshold is obtained. If the battery test capacity is greater than or equal to 90% of the design capacity, the battery capacity is qualified, and the battery charge and discharge efficiency threshold is 85%.

[0034] Reference Figure 5 As shown, further, in combination with the above-mentioned battery production intelligent management and control method based on multi-source data, a battery production intelligent management and control system based on multi-source data is proposed, including: 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.

[0035] Main control module, including: 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.

[0036] Information acquisition module, specifically including: 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.

[0037] Assessment modules include: 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.

[0038] In summary, the advantages of the present invention are that the slurry particle size distribution index is obtained through the polydispersity index and the particle size distribution coefficient, and the particle size distribution condition of the electrode mixed slurry is accurately evaluated through the slurry particle size distribution index to ensure the uniformity of the slurry. Through the slurry mixing uniformity coefficient, detection points are set for the electrode mixed slurry, and the detection point information is obtained to achieve dynamic setting of the detection points, thereby improving the detection efficiency while ensuring the detection accuracy, obtaining the optimal thickness of the electrode sheet through the battery performance index, and ensuring the maximization of the battery production quality through the optimal thickness of the electrode sheet, and ensuring the stability and reliability of the battery quality through the battery test data.

[0039] 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 to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached 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; Based on 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 so, the basic battery is qualified.

2. The method for intelligent battery production management and control based on multi-source data according to claim 1, characterized in that: 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, It 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.

3. The method for intelligent battery production management and control based on multi-source data according to claim 2, characterized in that: 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.

4. The method for intelligent battery production management and control based on multi-source data according to claim 3, characterized in that: 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, It represents the slurry particle size distribution index, and is the threshold value of slurry particle size distribution index.

5. 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.

6. 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.

7. 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 6, 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.

8. The battery production intelligent management and control system based on multi-source data according to claim 7 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.

9. The battery production intelligent management and control system based on multi-source data according to claim 7, 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.

10. The battery production intelligent management and control system based on multi-source data according to claim 7, 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.

Images