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The specialized airflow pulverizer for electronic battery materials is designed to meet the processing needs of "ultra-fine, high-purity, narrow particle size, impurity free, and low pollution" battery materials. It is suitable for the processing of materials throughout the entire industry chain, including lithium batteries, sodium batteries, and energy storage batteries. Its application scenarios cover key materials such as battery positive and negative electrodes, electrolytes, and separators, as well as core scenarios such as high demand industrial production and laboratory research and development. The specific requirements are as follows:
1、 Ultra fine grinding of battery core materials (core essential scenario)
This is the core application scenario of a dedicated airflow pulverizer, which is designed to meet the ultra-fine processing requirements of key battery materials. The particle size after pulverization is adapted to meet the high energy density and high rate performance requirements of batteries, and is the core process of battery material preparation
1. Exclusive pulverization of positive electrode material
Suitable for processing positive electrode powders of ternary materials (NCM/NCA), lithium iron phosphate (LFP), lithium manganese iron phosphate (LMFP), lithium cobalt oxide, lithium manganese oxide, etc. After crushing, the particle size can be correctly controlled within D50=1-10 μ m, with narrow particle size distribution (span ≤ 2 μ m), no large particle impurities, ensuring the conductivity and compaction density of positive electrode materials, and suitable for the production of high endurance and high safety batteries.
Core adaptation conditions: grinding of positive electrode precursor after calcination, refinement of positive electrode material before modification, and low loss grinding of high nickel ternary materials.
2. Exclusive pulverization of negative electrode materials
Suitable for natural graphite, artificial graphite, silicon carbon negative electrode, hard carbon/soft carbon, lithium titanate and other negative electrode materials. After crushing, the particle size D50=5-20 μ m can achieve regular particle morphology without over crushing, ensuring the lithium insertion capacity and cycling stability of negative electrode materials, and meeting the needs of fast charging batteries.
Core adaptation conditions: ultrafine grinding of graphite ore after purification, uniform refinement of silicon carbon composite negative electrode, and pre-treatment of negative electrode material before granulation.
3. Grinding of electrolyte/diaphragm supporting materials
Suitable for electrolyte lithium salts (lithium hexafluorophosphate, lithium difluorosulfonyl imide), membrane coating materials (alumina, boehmite, silica), conductive agents (conductive carbon black, Ketchen black, carbon nanotubes), etc. After crushing, the particle size D50 is 0.5-5 μ m, the purity is ≥ 99.99%, and no metal impurities are introduced to avoid affecting the stability of the electrolyte and the insulation of the membrane.
2、 High purity battery material processing scenario (core adaptation scenario)
Electronic batteries have strict requirements for material purity (metal impurity content ≤ 10ppm), and dedicated airflow crushers eliminate pollution from structure to process, adapting to the processing needs of high-purity materials
1. Metal free processing scenario: Suitable for materials sensitive to metal impurities such as high nickel ternary (NCM811/955) and solid-state battery electrolytes (sulfides, oxides). The equipment chamber is made of ceramic (alumina, zirconia) and high-purity stainless steel materials, with no wear or slag, and the crushing process does not introduce heavy metal impurities such as iron and copper, ensuring battery cycle life and safety.
2. Low pollution processing scenarios: Suitable for battery materials such as medical energy storage batteries and aerospace batteries, the entire crushing process is sealed without dust leakage, avoiding oxidation of materials in contact with air (such as silicon carbon negative electrodes that are prone to oxidation), and there is no lubricating oil pollution, ensuring material purity and stable electrochemical performance.
3、 Processing scenarios with narrow particle size distribution and controllable morphology
The particle size uniformity of battery materials directly affects the consistency of batteries. A dedicated airflow crusher can correctly control the particle size distribution and adapt to scenarios with high requirements for particle morphology and particle size accuracy
1. Narrow distribution powder preparation scenario: Suitable for materials such as power batteries and consumer electronics batteries (mobile phones, laptops) that require high consistency of battery cells. After crushing, the particle size distribution coefficient CV value is ≤ 15%, with no coarse particles (D97 is correctly controllable), avoiding uneven charging and discharging of battery cells, local overheating, and improving battery yield.
2. Shape friendly crushing scenario: Suitable for materials such as silicon carbon negative electrode and lithium iron phosphate that are easily crushed and have high requirements for morphology, using supersonic airflow impact crushing without mechanical extrusion grinding, which can retain the original sphericity of particles (sphericity ≥ 0.85), avoid electrode cracking caused by excessive particle edges, and ensure battery cycling performance.
4、 Thermal sensitive, flammable and explosive battery material processing scenarios
Some battery materials have thermal sensitivity, flammability, and explosiveness, and specialized airflow crushers are suitable for processing in low-temperature and inert atmospheres to eliminate safety hazards
1. Grinding of thermosensitive materials: Suitable for thermosensitive materials such as lithium hexafluorophosphate and solid-state battery electrolytes (easily decomposed when heated), using air flow self cooling grinding, with a temperature rise of ≤ 5 ℃ during the grinding process, without material deterioration caused by high temperature, ensuring material chemical stability.
2. Crushing of flammable and explosive materials: Suitable for flammable and explosive powders such as silicon powder and some lithium based materials, it can be equipped with an inert gas circulation system such as nitrogen and argon gas. The whole process is crushed in an oxygen free environment, eliminating the risk of dust explosion and avoiding material oxidation and deterioration.
5、 Industrial mass production and large-scale processing scenarios
Adapting to the large-scale production demand of battery materials, balancing efficiency and stability, it is the core processing equipment for the large-scale production of the battery industry chain
1. Large scale continuous production scenario: Suitable for large-scale production lines of power battery enterprises, with a single machine processing capacity of up to 50-500kg/h, supporting 24-hour continuous operation, seamlessly connecting with subsequent processes such as batching, mixing, sintering, etc., achieving automated continuous production and adapting to the processing needs of 10000 ton battery materials.
2. Multi variety switching processing scenarios: Suitable for the rapid upgrading of battery material research and development, little batch production needs of multiple varieties, easy cleaning of equipment chambers, no material residue (residual amount ≤ 0.01%), and the ability to quickly switch between different materials such as ternary, lithium iron phosphate, graphite, etc., without the need for large-scale disassembly and cleaning, improving the flexibility of the production line.
6、 Laboratory research and development and little-scale trial production scenarios
Adapt to the little batch trial production and performance testing needs of battery material research and development stage, balancing accuracy and flexibility
1. R&D little/pilot test scenarios: Suitable for the R&D departments of universities and battery companies, the processing capacity of little specialized airflow crushers can be as low as 10-500g/batch, and the crushing pressure and grading speed can be correctly adjusted to quickly obtain performance data of materials with different particle sizes, assisting in the development of new material formulas.
2. Customized scenarios for special specification materials: Suitable for customized processing of new battery materials such as solid-state batteries and sodium ion batteries, with flexible adjustment of process parameters to meet the processing needs of niche and special particle sizes (such as D50<1 μ m ultrafine powder), laying the foundation for the industrialization of new batteries.
7、 Pre treatment scenario before modification of supporting battery materials
Adapt to the pre grinding requirements of battery material surface modification, coating and other processes to ensure the uniformity of modification
1. Refine the scene before coating: Suitable for processes such as ternary material coating and lithium iron phosphate carbon coating. After crushing, the powder has a uniform specific surface area, which can make the coating layer denser and more uniform, improving the material's cyclic stability and high-temperature performance.
2. Homogenization scenario before modification: Suitable for silicon carbon negative electrode composite modification, crushing the conductive agent before dispersion, refining the material particles uniformly, which can improve the bonding force between the modifier and the matrix material, and ensure the conductivity and structural stability of the battery material.
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