Explosion-Proof Dust Collection for Lithium Battery Production
Release Date：
Apr 14,2026
The production process of lithium batteries can be divided into front-end processes and back-end processes. The front-end processes mainly include mixing, coating, rolling, slitting, tab forming, die-cutting, and others, involving equipment such as mixers, coaters, rolling mills, slitting machines, tab forming machines, die-cutting machines, etc. Slurry mixing involves uniformly blending the solid materials for the positive and negative electrodes, then adding solvent and stirring into a slurry. Coating is the process of uniformly applying the mixed slurry onto metal foil and drying it to produce positive and negative electrode sheets. Rolling further compacts the coated electrode sheets, thereby increasing the energy density of the battery.<br>
During lithium battery production, from material mixing, coating, and rolling through to winding and welding, fine powders or oil mists are generated. The dust collection in this context features low airflow, fire protection, explosion protection, and high-efficiency purification. Tenzon configures different fire-proof or explosion-proof high-efficiency dust collectors — such as the MULT, HT, and LT series — according to the fume and dust characteristics at each workstation, and employs filter cartridges and filter plates as the filter media.
TECHNOLOGY
— The lithium-ion battery manufacturing process is divided into upstream (front-end) and downstream (back-end) stages. Key upstream processes include mixing, coating, calendering, slitting, electrode sheet formation, and die-cutting, utilizing equipment such as mixers, coaters, calenders, slitters, sheet-forming machines, and die-cutters. Slurry mixing involves blending solid cathode and anode materials with a solvent to create a uniform slurry. Coating entails applying this slurry evenly onto metal foils and drying them to produce cathode and anode sheets. Calendering involves further compacting the coated electrode sheets to enhance the battery's energy density.
— Lithium-ion battery production—spanning processes from material mixing, coating, and calendering to winding and welding—generates fine dust or oily fumes. Dust extraction systems for these operations must handle low air volumes while ensuring fire safety, explosion protection, and high-efficiency purification. Based on the specific characteristics of the fumes and dust at each workstation, Tenzon deploys high-efficiency dust collectors—such as the MULT, HT, and LT series—featuring fire-resistant or explosion-proof capabilities and utilizing filter cartridges or filter plates as the filtration media.
Key safety features
— For flammable and explosive dust, the dust collection system requires explosion zoning analysis and specific safety configurations based on the Lower Explosive Limit (LEL) and ignition temperature. Key safety configurations include:
✓ Duct air velocity exceeding 23 m/s; ✓ Grounding of ducts and the dust collector; ✓ Steep-angle dust hoppers to prevent dust accumulation; ✓ Rotary discharge valve (star valve); ✓ Dust collector equipped with flameless explosion venting panels or directional explosion venting panels (venting toward a safe area); ✓ Safety explosion isolation valve on the inlet duct; ✓ Explosion-resistant structural reinforcement for the dust collector and inlet duct; ✓ Explosion-proof electrical control cabinet (compliant with explosion zoning); ✓ Spark-resistant materials at the fan inlet; ✓ Explosion-proof motors for the fan and discharge valve (compliant with explosion zoning).
