Influence of threaded pipe structural parameters on the conveyance of lithium-ion battery anode materials

Abstract

Particle stratification occurs during the pneumatic conveyance of lithium-ion battery (LIB) anode materials, resulting in an uneven particle size distribution, which affects battery performance. To optimize the conveyance of lithium-ion battery anode material particles and achieve uniform mixing of large and small particles, this study proposes the inclusion of a threaded pipe section and evaluates this structure based on numerical simulations and experimental research. The results indicate that a pitch of 500 mm maximizes the mixing performance enhancement coefficient for the threaded pipe section. Additionally, the mixing performance is best for a channel comprising 4 threaded pipe sections (the enhancement coefficient exceeds 1.6). The final structure with 4 threaded pipe sections, 500 mm pitch, and 4 channels can be used for graphitic anodes in LIBs under conditions of a small pressure drop and excellent mixing performance. This structure also provides uniform particle transportation.