The core of the electrolyte filling pump is corrosion resistance, high precision, and leak-proof, and the material selection directly determines its performance service life.

‌Main materials and applicable scenarios:‌

‌Fluorine plastic (PTFE/PVDF)‌: resistant to strong acid and alk, it is the first choice for electrolyte delivery, especially suitable for electrolytes containing LiPF₆. For example, both RMD series and E-WIC MD/W series magnetic drive pumps adopt this material.

‌316L stainless steel‌: has good corrosion resistance, suitable for general medicine filling, but note that its long-term resistance may not be as good as fluorine plastic.

‌Ceramics (zirconia/alumina)‌: high hardness, wear resistance, and strong chemical inertness, suitable for high-precision metering and corrosive liquids, such as lithium battery electrolyte filling pumps.

‌Other factors to consider when selecting a model‌

‌Temperature range‌: The working temperature of the electrolyte is usually between -20℃ and 100℃, and the material of the pump to adapt to this range.

‌Explosion-proof grade‌: The lithium battery workshop is an explosion-proof area, and the pump needs to reach Ex d IIB4 or above explosion-proof grade.

‌Seal structure‌: It is preferred to choose a fully enclosed isolation sleeve   magnetic coupling design, which completely eliminates the dynamic sealing and achieves zero leakage.