In the new energy lithium battery industry, the root cause of many product defects, customer complaints, and safety hazards often lies not in the chemical formula, but in micron-sized magnetic foreign particles. With the official implementation of two major national standards—GB 38031-2025 for electric vehicle power batteries and GB 44240-2024 for large-scale energy storage batteries—lithium battery safety has become a mandatory regulatory requirement.
During the grinding, mixing, conveying, and sintering processes, lithium battery cathode/anode materials, precursors, and graphite anodes are highly prone to generating minute metallic wear particles. These weakly magnetic particles are extremely small and present in trace amounts, making them impossible to fully capture with standard permanent magnetic equipment.
Yet, these seemingly insignificant impurities can directly lead to:
Micro-short circuits in cells, elevated self-discharge rates, reduced cycle life, and lower production yields; in severe cases, they can compromise entire batch deliveries and damage brand reputation.
As entry standards from leading battery manufacturers continue to rise, controlling magnetic foreign particles at the PPb (parts-per-billion) level has shifted from being a “bonus feature” to a “standard requirement” for new energy material suppliers.
Foshan Wandaye Technology’s high-gradient magnetic removal equipment, designed specifically for new energy powder and slurry applications, precisely solves the challenge of capturing ultra-fine, weakly magnetic impurities.
Unlike standard industrial iron-removal equipment, our systems feature comprehensive upgrades tailored to the lithium battery industry’s high standards:
1. High-gradient specialized magnetic media to capture micron-sized, weakly magnetic impurities
Precisely intercepts ultra-fine metal debris in materials such as LFP (Lithium Iron Phosphate), ternary materials, artificial graphite, silicon-carbon anodes, and precursors, effectively keeping magnetic foreign particle levels within strict industry limits.
2. Fully sealed, dust-free structure suitable for cleanroom environments
Features a specialized wear-resistant and anti-corrosive coating that prevents secondary metal contamination and preserves the powder’s original physicochemical properties, meeting the rigorous demands of new energy material production.
3. Constant-temperature operation via water and oil cooling; supports 24-hour continuous mass production
Eliminates issues such as excessive temperature rise, performance degradation, and frequent downtime during prolonged operation; ensures stable performance on high-capacity lithium battery production lines.
4. Fully automated, intelligent demagnetization; no residual magnetism or agglomeration
Achieves complete demagnetization upon power-off; utilizes a high-pressure flushing system to prevent slurry adhesion and powder residue, ensuring consistent material purity across every batch.
Value in Mass Production:
After implementing Foshan Wandaye Technology’s demagnetization solutions, numerous lithium battery material manufacturers have seen a drastic reduction in magnetic foreign matter content and cell defect rates, along with significant improvements in self-discharge performance. These companies have successfully passed rigorous spot checks by downstream battery manufacturers, thereby enhancing their market competitiveness.
Competition in the lithium battery industry has long since moved beyond mere production capacity and pricing; precise impurity control is the core competitive barrier in the high-end supply chain.
Foshan Wandaye Technology offers: free sample testing for lithium battery powders/slurries, customized demagnetization process solutions, integrated equipment for entire production lines, and comprehensive technical support.
Contact us anytime to discuss sample testing and optimize your production line’s demagnetization process to reduce defect rates.
