The first OnePlus phone that charges for record 15 minutes goes official as the Ace

The charging and discharging process can be simply viewed as the movement of lithium ions between positive and negative electrodes. While charging and discharging, lithium ions are running between the positive and negative electrode through electrolyte conduction. When active lithium ions cannot return to the positive side because of overcurrent, they become “dead lithium”, causing the capacity of the battery to degrade. Therefore, it is essential to control the charging current and voltage in a reasonable range to prevent overcurrent and overcharge and maintain as many active lithium ions as possible to protect the batteries.

Through three years of research and innovation, the OPPO Research Institute has conducted a significant number of tests on battery performance. By constantly optimizing the accuracy of the battery model, the Smart Battery Health Algorithm is able to determine the safest charging current based on different battery capacities, charging adapters, battery conditions, and stages of charging, therefore maximizing the activity of lithium-ions and prolonging the battery’s lifespan.

The Solid Electrolyte Interphase, also known as SEI, is formed by the reduction reaction of a small amount of polar solvent in the electrolyte after obtaining some electrons while charging and discharging lithium-ion batteries. It is distributed on the surface of the positive and negative electrode, which effectively protects the electrode material from damage caused by solvent molecules and improves the charging cycle performance of the electrodes. Battery Healing Technology helps the battery to continuously repair the SEI during the charging and discharging cycle, making the SEI more stable and durable in real time. Furthermore, it reduces the damage inflicted to the electrodes due to charging and discharging, therefore enhancing the battery performance and extending battery lifespan.