Charger automatically tracking an optimal charging frequency for sinusoidal wave batteries
AssigneeNational Changhua University of Education
InventorLiang-Rui Chen
Life of this patent
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Abstract
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 fr that charges batteries with a sinusoidal wave, automatic tracing function, and a fixed current. While the resonance frequency fr is adopted in a charging device and served as the optimum charging frequency, the using life of the batteries could be extended.
Claims23
A method for charging batteries comprising a Sinusoidal Wave that is formed by at least either a charging voltage wave or a charging current wave at the same time.
A method for charging batteries comprising a Sinusoidal Wave with a DC offset formed by at least either a charging voltage wave or a charging current wave at the same time.
A device for charging batteries at least comprising a controllable sinusoidal power for outputting sinusoidal wave voltages or sinusoidal wave currents of different frequencies so as to charge said batteries.
A device for charging batteries at least comprising a phase comparator for determining a charging frequency of said batteries.
A device for charging batteries at least comprising a controllable sinusoidal wave power, a small-signal voltage detecting circuit, and a phase comparator;
- wherein,
- said controllable sinusoidal wave power receiving an output phase contrast signal of said phase comparator for changing an output frequency of said sinusoidal wave power until said output phase contrast signal of said phase comparator equals to zero or a determined value;
- said small-signal voltage detecting circuit measuring a charging voltage of said batteries and filtering out a DC part thereof for attaining a small-signal voltage signal, so that said small-signal voltage signal is simultaneously amplified and transmitted to said phase comparator;
- and
- said phase comparator receiving a current phase signal from said controllable sinusoidal wave power and a voltage phase signal from said small-signal voltage detecting circuit for comparing a phase contrast therebetween and transmitting a comparing result to said controllable sinusoidal wave power.
A device for charging batteries comprising a controllable sinusoidal wave power, a small-signal current detecting circuit, and a phase comparator;
- wherein,
- said controllable sinusoidal wave power receiving an output phase contrast signal of said phase comparator for changing an output frequency of said sinusoidal wave power until said output phase contrast signal of said phase comparator equals to zero or a determined value;
- said small-signal current detecting circuit measuring a charging current of said batteries and filtering out a DC part thereof for attaining a small-signal current signal, so that said small-signal current signal is simultaneously amplified and transmitted to said phase comparator;
- and
- said phase comparator receiving a voltage phase signal from said controllable sinusoidal wave power and a current phase signal from said small-signal current detecting circuit for comparing a phase contrast therebetween and transmitting a comparing result to said controllable sinusoidal wave power.
A device for charging batteries at least comprising a controllable sinusoidal wave power, a small-signal current detecting circuit, a small-signal voltage detecting circuit, and a phase comparator;
- wherein,
- said controllable sinusoidal wave power receiving an output phase contrast signal of said phase comparator for changing an output frequency of said sinusoidal wave power until said output phase contrast signal of said phase comparator equals to zero or a determined value;
- said small-signal current detecting circuit measuring a charging current of said batteries and filtering out a DC part thereof for attaining a small-signal current signal, so that said small-signal current signal is simultaneously amplified and transmitted to said phase comparator;
- said small-signal voltage detecting circuit measuring a charging voltage of said batteries and filtering out a DC part thereof for attaining a small-signal voltage signal, so that said small-signal voltage signal is simultaneously amplified and transmitted to said phase comparator;
- and
- said phase comparator receiving a voltage phase signal from said small-signal voltage detecting circuit and a current phase signal from said small-signal current detecting circuit for comparing a phase contrast therebetween and simultaneously transmitting a comparing result to said controllable sinusoidal wave power.
Dependencies are inferred from the claim text.