| Summary: | 碩士 === 崑山科技大學 === 電機工程研究所 === 97 === The lead-acid batteries has economic benefits, and widely used in various applications such as automotive power system, uninterruptible power system telecom power supply, and so on. However, charge the battery with the charger after the electric energy is used. The main aim of this thesis is to improve the charge efficiency and prolong the battery lifetime. Accordingly, a battery charge with class D-E resonant converter is proposed in this thesis.
In the proposed battery chargers with Class D-E resonant converter bears the advantages such as simpler circuit structures, smaller volume, lighter weight, higher efficiency, low switching loss, as well as lower cost. An L-C resonant tank is used that results in oscillating output voltage and charging current and thus provides zero-voltage and/or zero-current switching. The operating principles and equivalent circuit are analyzed and discussed in detail. Simulation and experimental results are conducted for a 12V-12Ah lead-acid battery to verify the feasibility, can reach an efficiency higher than 80%.
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