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

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.

Interleaved PFC balance charger with passive lossless snubber for series-connected batteries

“…In this paper, the constant-current/constant-voltage (CC/CV) charging method shown in Fig. 2 is used to charge each battery [24][25][26][27]. The charging process of each battery in the developed circuit can be independently controlled by the corresponding active switch.…”

Design and implementation of a battery test system with energy recycling technique

“…becomes one of the main items for development in science and technology. The lithium-ion batteries as a mainstream power source for various electric vehicles have turned a popular research topic, especially the research focus on state of charge (SOC) and state of health (SOH) [2,3]. A typical battery test system captures the battery's characteristics from the sampling circuit [4], and the electronic load discharge energy of battery by constant current (CC) or step current.…”