| Title | A power-efficient acquisition front end for the Li-ion battery management systems |
| Authors | Bao, Yuanxin Ye, Le |
| Affiliation | Peking Univ, Sch Integrated Circuit, Beijing Lab Future IC Technol & Sci, Beijing, Peoples R China Peking Univ, Adv Inst Informat Technol, Hangzhou, Peoples R China |
| Keywords | BANDGAP REFERENCE |
| Issue Date | Nov-2022 |
| Publisher | MICROELECTRONICS JOURNAL |
| Abstract | This paper presents a Coulomb sensing method-based power-efficient acquisition front-end (AFE) for Li-ion battery management systems (BMSs). The AFE, based on two self-calibrated incremental analog-to-digital converters (ADCs), measures the instant current flows in and out of the Li-ion battery, the cell voltage, and the internal and external temperature of the chip to compensate for the state of charge. A switched-capacitor CMOS bandgap reference (BGR) is proposed to obtain stable reference voltage over an operating temperature range of the BMS. A wake-up comparator indicates that a large charging and discharging current occurs while the BMS is in sleeping mode. This solution significantly reduces the obtained samples and has better power efficiency than an always-acquisition method. A prototype was fabricated in the 110-nm CMOS process, achieving a DNL of -0.85/+1.7 LSB and an INL of -3.2/+4.2 LSB. The total current consumption of the normal operation and the sleeping mode from a battery is 23 mu A and 1.26 mu A, respectively. |
| URI | http://hdl.handle.net/20.500.11897/657646 |
| ISSN | 0026-2692 |
| DOI | 10.1016/j.mejo.2022.105598 |
| Indexed | EI SCI(E) |
| Appears in Collections: | 待认领 |
