A 42nJ/conversion on-demand state-of-charge indicator for miniature IoT Li-ion batteries

Junwon Jeong; Seokhyeon Jeong; Chulwoo Kim; Dennis Sylvester; David Blaauw

doi:10.23919/VLSIC.2017.8008484

A 42nJ/conversion on-demand state-of-charge indicator for miniature IoT Li-ion batteries

Junwon Jeong, Seokhyeon Jeong, Chulwoo Kim, Dennis Sylvester, David Blaauw

School of Electrical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

2 Citations (Scopus)

Abstract

An energy efficient State-of-Charge (SOC) indication algorithm and integrated system for small IoT batteries are introduced in this paper. The system is implemented in a 180-nm CMOS technology. Based on a key finding that small Li-ion batteries exhibit a linear dependence between battery voltage and load current, we propose an instantaneous linear extrapolation (ILE) algorithm and circuit allowing on-demand estimation of SOC. Power consumption is 42nW and maximum SOC indication error is 1.7%.

Original language	English
Title of host publication	2017 Symposium on VLSI Circuits, VLSI Circuits 2017
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	C206-C207
ISBN (Electronic)	9784863486065
DOIs	https://doi.org/10.23919/VLSIC.2017.8008484
Publication status	Published - 2017 Aug 10
Event	31st Symposium on VLSI Circuits, VLSI Circuits 2017 - Kyoto, Japan Duration: 2017 Jun 5 → 2017 Jun 8

Other

Other	31st Symposium on VLSI Circuits, VLSI Circuits 2017
Country/Territory	Japan
City	Kyoto
Period	17/6/5 → 17/6/8

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.23919/VLSIC.2017.8008484

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A 42nJ/conversion on-demand state-of-charge indicator for miniature IoT Li-ion batteries. / Jeong, Junwon; Jeong, Seokhyeon; Kim, Chulwoo et al.

2017 Symposium on VLSI Circuits, VLSI Circuits 2017. Institute of Electrical and Electronics Engineers Inc., 2017. p. C206-C207 8008484.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Jeong, J, Jeong, S, Kim, C, Sylvester, D & Blaauw, D 2017, A 42nJ/conversion on-demand state-of-charge indicator for miniature IoT Li-ion batteries. in 2017 Symposium on VLSI Circuits, VLSI Circuits 2017., 8008484, Institute of Electrical and Electronics Engineers Inc., pp. C206-C207, 31st Symposium on VLSI Circuits, VLSI Circuits 2017, Kyoto, Japan, 17/6/5. https://doi.org/10.23919/VLSIC.2017.8008484

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AU - Blaauw, David

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AB - An energy efficient State-of-Charge (SOC) indication algorithm and integrated system for small IoT batteries are introduced in this paper. The system is implemented in a 180-nm CMOS technology. Based on a key finding that small Li-ion batteries exhibit a linear dependence between battery voltage and load current, we propose an instantaneous linear extrapolation (ILE) algorithm and circuit allowing on-demand estimation of SOC. Power consumption is 42nW and maximum SOC indication error is 1.7%.

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A 42nJ/conversion on-demand state-of-charge indicator for miniature IoT Li-ion batteries

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