On-chip Wide Range Bidirectional Current Sensor for Li-ion Battery Management System

AbstractAn on-chip wide range bidirectional current sensor for monitoring Li-ion battery model 18650 is proposed in this paper. In order to detect the bidirectional current, two feedback sensing loops are employed. The feedback sensing loops generate differential sensed current signals. The output summation driver is included to convert the differential current signals to a single-ended output voltage signal and improve the driving ability. The proposed design is implemented using a typical 0.25

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On-chip Wide Range Bidirectional Current Sensor for Li-ion Battery Management System

Nano Devices and Sensors ◽

10.1515/9781501501531-007 ◽

2016 ◽

Author(s):

Tzung-Je Lee ◽

Yen-Ting Chen

Keyword(s):

Management System ◽

Current Sensor ◽

Battery Management System ◽

Battery Management ◽

Li Ion Battery ◽

Wide Range ◽

Li Ion ◽

On Chip

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Approximations for Partial Differential Equations Appearing in Li-Ion Battery Models

Volume 1: Aerial Vehicles; Aerospace Control; Alternative Energy; Automotive Control Systems; Battery Systems; Beams and Flexible Structures; Biologically-Inspired Control and its Applications; Bio-Medical and Bio-Mechanical Systems; Biomedical Robots and Rehab; Bipeds and Locomotion; Control Design Methods for Adv. Powertrain Systems and Components; Control of Adv. Combustion Engines, Building Energy Systems, Mechanical Systems; Control, Monitoring, and Energy Harvesting of Vibratory Systems ◽

10.1115/dscc2013-4072 ◽

2013 ◽

Cited By ~ 2

Author(s):

Nalin A. Chaturvedi ◽

Jake F. Christensen ◽

Reinhardt Klein ◽

Aleksandar Kojic

Keyword(s):

High Energy ◽

High Energy Density ◽

Particle Model ◽

Approximation Technique ◽

Battery Management System ◽

Battery Management ◽

Li Ion Battery ◽

Battery Model ◽

Constant Diffusion ◽

Li Ion

Li-ion based batteries are believed to be the most promising battery system for HEV/PHEV/EV applications due to their high energy density, lack of hysteresis and low self-discharge currents. However, designing a battery, along with its Battery Management System (BMS), that can guarantee safe and reliable operation, is a challenge since aging and other mechanisms involving optimal charge and discharge of the battery are not sufficiently well understood. In a previous article [1], we presented a model that has been studied in [2]–[5] to understand the operation of a Li-ion battery. In this article, we continue our work and present an approximation technique that can be applied to a generic battery model. These approximation method is based on projecting solutions to a Hilbert subspace formed by taking the span of an countably infinite set of basis functions. In this article, we apply this method to the key diffusion equation in the battery model, thus providing a fast approximation for the single particle model (SPM) for both variable and constant diffusion case.

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Estimation of State of Charge (SoC) Using Modified Coulomb Counting Method With Open Circuit Compensation For Battery Management System (BMS)

JAREE (Journal on Advanced Research in Electrical Engineering) ◽

10.12962/jaree.v5i1.150 ◽

2021 ◽

Vol 5 (1) ◽

Author(s):

Puspita Ningrum ◽

Novie Ayub Windarko ◽

Suhariningsih Suhariningsih

Keyword(s):

Management System ◽

Voltage Divider ◽

Open Circuit ◽

Voltage Sensor ◽

State Of Charge ◽

Battery Management System ◽

Battery Management ◽

Li Ion Battery ◽

Control Center ◽

Li Ion

Abstract— Battery is one of the important components in the development of renewable energy technology. This paper presents a method for estimating the State of Charge (SoC) for a 4Ah Li-ion battery. State of Charge (SoC) is the status of the capacity in the battery in the form of a percentage which makes it easier to monitor the battery during use. Coulomb calculations are widely used, but this method still contains errors during integration. In this paper, SoC measurement using Open Circuit Voltage Compensation is used for the determination of the initial SoC, so that the initial SoC reading is more precise, because if the initial SoC reading only uses a voltage sensor, the initial SoC reading is less precise which affects the next n second SoC reading. In this paper, we present a battery management system design or commonly known as BMS (Battery Management System) which focuses on the monitoring function. BMS uses a voltage sensor in the form of a voltage divider circuit and an ACS 712 current sensor to send information about the battery condition to the microcontroller as the control center. Besides, BMS is equipped with a protection relay to protect the battery. The estimation results of the 12volt 4Ah Li-ion battery SoC with the actual reading show an error of less than 1%.Keywords—Battery Management System, Modified Coulomb Counting, State of Charge.

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