Traditional dielectric Film for electric vehicles (EV) Battery features ultra‑thin substrate, which tends to trigger various defects during production, including bonding offset, corner overlapping material, surface scratches and peeling failure. Meanwhile, it delivers limited dielectric withstand voltage performance and insufficient adhesion. Manual handling of corner positions may easily lead to moisture ingress and liquid leakage risks, resulting in weak overall protection reliability.Leveraging innovative integration of 3D printing and precision dispensing technologies, Rocktin has self‑developed a 3D digital spraying solution and pioneered the vertical side‑spray process to achieve one‑shot three‑side forming with precisely controllable coating thickness, zero‑splash and zero‑residue spraying. The fully‑automatic high‑speed equipment completes spraying and curing on six sides of a Battery Cell within 2 seconds. When paired with dedicated high‑viscosity functional materials, the solution greatly improves the Battery Cell’s dielectric withstand voltage, corrosion resistance and coating adhesion. It fundamentally eliminates the inherent drawbacks of conventional dielectric Film, delivers long‑term stable protection for fast‑charging Batteries, and supports integrated customized solutions covering both equipment and adhesive materials