| Summary: | 碩士 === 國立臺北科技大學 === 電機工程研究所 === 105 === This thesis presents a lithium battery charger with variable charging current and automatic voltage compensation control schemes. A digital signal processor (DSP) is used as the core of control to monitor the voltage and current of two battery packs to control the charging current and depending on the internal resistance of battery pack to do automatic voltage compensation to achieve battery pack balance and fast charging. In order to improve the charging efficiency of the charger, the lithium battery pack is adopted with 4S2P (4 series 2 parallel) connections for charging. There are three charging modes：trickle current mode - constant current mode - constant voltage mode.
In this thesis, a DSP TMS320F28035 is produced by Texas Instruments is used. The system voltage is 19.5V, the switching frequency is 60 KHz, using the lithium batterie cell of Panasonic UR14650R (1000 mAh). The lithium battery pack is adopted with 4S2P (4 series 2 parallel) connections for charging application. The experimental results have verified the feasibility of the proposed architecture.
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