Low Parasitic Current `Half ON' Operation of Battery Protection IC

Matsunaga, Shinichiro; Sawada, M.; Sugimoto, M.; Fujishima, N.

doi:10.1109/ispsd.2007.4294929

Cited by 3 publications

(2 citation statements)

References 5 publications

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“…Currently, the Li‐ion battery, characterised by small size, large energy density and environmental protection, has been widely used in various portable electronic products. Li‐ion battery protection integrated circuits (ICs) have been widely used in battery management systems to protect Li‐ion batteries from various application faults [1–7]. In these ICs, voltage detection is an essential function to protect Li‐ion batteries from over‐charge and over‐discharge.…”

Section: Introductionmentioning

confidence: 99%

Novel broken line detection circuit for multi‐cells Li‐ion battery protection ICs

Liu

Sun

et al. 2019

IET Circuits, Devices & Systems

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To reduce the excessive power consumption and eliminate the battery voltage imbalance caused in conventional method, a novel broken line detection scheme for Li-ion battery protection integrated circuits (ICs) is presented in this study. The main part of the proposed circuit consists of pull-up, pull-down current source, source-driven MOS, a control switch and a bias current source. A narrow pulse control signal is adopted to trigger broken line detection periodically so as to suppress the detection current consumption, while the disadvantage of battery voltage imbalance is overcome. The proposed circuit has been implemented in a seven cells Li-ion battery protection IC with 0.18 µm 45 V bipolar-CMOS-DMOS process successfully. The experimental results confirm that the chip can reliably detect the disconnections of Li-ion batteries and take protective measures in a wide cell voltage range from 2.2 to 4.2 V. Furthermore, based on the derivation in this study, the proposed technique can significantly reduce the detection current consumption of each cell, which is well beneficial for low power consumption and battery voltage balance.

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Section: Introductionmentioning

confidence: 99%

Novel broken line detection circuit for multi‐cells Li‐ion battery protection ICs

Liu

Sun

et al. 2019

IET Circuits, Devices & Systems

View full text Add to dashboard Cite

show abstract

“…Li-ion batteries, however, have safety problems such as characteristic degradation, short life cycle, overheating or exploding when they are in the state of over-charge, over-discharge, or over-current. To safeguard against these risks, a Li-Ion battery usually contains a battery protection integrated circuit (BPIC) that protects it from overcharging and over depleting by managing the charging/discharging path [1][2][3][4][5][6][7][8][9]. The main flaw in the conventional BPIC design is that it can enter into an unstable operational mode when the battery is in an over-discharged state.…”

Section: Introductionmentioning

confidence: 99%