Fast battery charger MCU with adaptive pwm controller using runtime tracking of polarization curve

Daejin Park, Mengdi Yin, Sungho Kwak, Jeonghun Cho

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

In this paper, a fast li-ion battery charger microcontroller (MCU) based on configurable pulse width modulation (PWM) controller by tracking the polarization curve of battery cells is proposed in order to inject the maximum charge-current without battery degradation and its fully customdesigned MCU is implemented as a system-on-chip (SoC) using 0.18 um Embedded Flash CMOS process. The evaluation results show that a newly designed charger is about 18.6% faster than the conventional constantcurrent (CC) charging method with the temperature rise within a reasonable range. The implemented charger system by tracking the battery cell polarization curve results in charging 4 cells of battery to about 80% of its maximum capacity in less than 56 minutes and 13°C maximum temperature rise without damaging the battery.

Original languageEnglish
Article number20160131
JournalIEICE Electronics Express
Volume13
Issue number8
DOIs
StatePublished - 25 Mar 2016

Keywords

  • Fast battery charger
  • Microcontroller
  • Polarization
  • Pulse width modulation

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