Charger automatically tracking an optimal charging frequency for sinusoidal wave batteries

摘要

A device and a method automatically trace and fix a resonance frequency of the batteries for offering an optimal charging frequency to the batteries. The device and method utilize a resonance frequency f_r that charges batteries with a sinusoidal wave, automatic tracing function, and a fixed current. While the resonance frequency f_r is adopted in a charging device and served as the optimum charging frequency, the using life of the batteries could be extended.