A Comparison of Online Electrochemical Spectroscopy Impedance Estimation of Batteries

Varnosfaderani, Mina Abedi; Strickland, Dani

doi:10.1109/access.2018.2808412

Cited by 34 publications

(10 citation statements)

References 43 publications

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“…An AC current injector for batteries was implemented using buck, synchronous buck, boost, and resonant power converters [1][2][3][4][7][8][9][10]. A synchronous buck converter for AC current injection to battery was used in this paper as shown in Figure 3.…”

Section: Topologies and Modulationmentioning

confidence: 99%

“…Batteries are DC electrochemical energy storage devices which are mainly utilized as DC source or load in applications. However, AC current injection in a battery is necessary to preheat in cold weather, to measure the internal impedance, to balance the capacity based on impedance, and to charge by sinusoidal ripple current method [1][2][3][4]. Conventionally, AC current is injected to rechargeable batteries using linear circuits which work offline (the batteries are disconnected from the applications) [5,6].…”

Section: Introductionmentioning

confidence: 99%

“…Conventionally, AC current is injected to rechargeable batteries using linear circuits which work offline (the batteries are disconnected from the applications) [5,6]. Recently, power converters are being used to inject AC current to rechargeable batteries which can be operated either offline or online (the battery is connected to the applications) [1][2][3][4][7][8][9][10][11][12][13]. A buck converter topology was used to inject AC current on top of DC charging current in [9].…”

Section: Introductionmentioning

confidence: 99%

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Versatile AC Current Control Technique for a Battery Using Power Converters

Islam

Park

2021

Batteries

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Although a battery is a DC device, AC current is often necessary for testing, preheating, impedance spectroscopy, and advanced charging. This paper presents a versatile control technique to inject AC current to a battery. Synchronous buck and H-bridge topologies are operated in bidirectional mode and controlled by uni-polar and bi-polar pulse width modulation techniques for the AC current injection. The input and output passive circuits are specially designed considering AC current and the properties of the battery. A controller is proposed considering a small internal impedance, small AC ripple voltage, and variable DC offset voltage of a battery. The controller is capable of maintaining stable operation of AC current injection in two power quadrant within a small DC voltage boundary of a battery. The controller is comprised of a feedback compensator, a feedforward term, and an estimator. The feedback gain is designed considering the internal impedance. The feedforward gain is designed based on estimated open circuit battery voltage and input voltage. The open circuit voltage estimator is designed based on filters and battery model. For validation, AC current is injected to a Valence U-12XP battery. The battery is rated for 40 Ah nominal capacity and 13.8 V nominal voltage The controller successfully injected AC current to a battery with +10 A, 0 A and −10 A DC currents. The magnitude and frequency of the AC current was up to 5 A and 2 kHz respectively.

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Section: Topologies and Modulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Versatile AC Current Control Technique for a Battery Using Power Converters

Islam

Park

2021

Batteries

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“…In this paper, a power converter that is typically used to interface the battery with the load for current and voltage regulation functions, is utilized for online condition monitoring of the batteries through closed loop control of the power converter and duty-cycle perturbation. The major advantage derived from using a converter to carry out Electrochemical Impedance Spectroscopy measurement is that it obliterates disturbances in the system that might have occurred due to a disconnection of the system in operation or an application of an external ac signal through a signal generator [13], [20] - [24].…”

Section: Online Condition Monitoring Systemmentioning

confidence: 99%

Online Impedance Estimation of Sealed Lead Acid & Lithium Nickel - Cobalt - Manganese Oxide Batteries using a Rapid Excitation Signal

Alao¹,

Barendse²

2020

Preprint

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Electrochemical Impedance Spectroscopy (EIS) has gained traction as a technique apt for condition monitoring of batteries. The drawback of EIS is that it is only applicable when the system is offline (i.e. it must be disconnected from the load), takes a long time to complete and requires an expensive equipment for measurement. This work aims to adapt the EIS to serve as an in-situ measurement technique, that can be utilized for online condition monitoring of two unique battery chemistries – lead acid and lithium NCM. This work develops in twofold – firstly, the Chirp broadband signal is proposed amongst a variety of other broadband signals to significantly shorten the time required for EIS measurement. Subsequently, a power converter that is typically used to interface a battery with the load for current and voltage regulation functions, is utilized for online condition monitoring of both batteries through closed loop control of the power converter and duty-cycle perturbation. This combined approach presents a novel low-cost technique for online condition monitoring of batteries, with the ability to complete battery characterization in a very short time. In this regard, EIS measurement is completed for a lead acid battery (with lowest EIS characterization frequency of 0.1Hz) in 5 seconds and lithium NCM battery (with lowest EIS characterization frequency of 20mHz) in 25 seconds.

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“…A large number of works, dealing with EIS measurements performed on batteries by means of relatively large and expensive laboratory instrumentation, have been published [20,21]. Different solutions to perform EIS in operating conditions have been proposed in the literature [22]. Most of them modify circuits that are already present in the battery and load management system (e.g., DC/DC and DC/AC converters, charge balancing system) to produce the stimulus for the EIS and use off-the-shelf components for detecting the response [23,24].…”

Section: Introductionmentioning

confidence: 99%

An ASIC-Based Miniaturized System for Online Multi-Measurand Monitoring of Lithium-Ion Batteries

et al. 2021

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To better asses the ageing and to reduce the hazards involved in the use of Lithium-Ion Batteries, multi-measurand monitoring units and strategies are urged. In this paper, a Cell Management Unit, based on the SENSIPLUS chip, a recently introduced multichannel, multi-mode sensor interface, is described. SENSIPLUS is a single System on a Chip combined with a reduced number of external components, resulting in a highly miniaturized device, built on 20 × 8 mm2 printed circuit board. Thanks to SENSIPLUS’ versatility, the proposed system is capable of performing direct measurements (EIS, cell voltage) on the cell it is applied to, and reading different kinds of sensors. The SENSIPLUS versatile digital communication interface, combined with a digital isolator, enable connection of several devices to a single bus for parallel monitoring a large number of cells connected in series. Experiments performed by connecting the proposed system to a commercial Lithium-Ion Battery and to capacitive and resistive sensors are described. In particular, the capability of measuring the cell internal impedance with a resolution of 120 μΩ is demonstrated.

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A Comparison of Online Electrochemical Spectroscopy Impedance Estimation of Batteries

Cited by 34 publications

References 43 publications

Versatile AC Current Control Technique for a Battery Using Power Converters

Versatile AC Current Control Technique for a Battery Using Power Converters

Online Impedance Estimation of Sealed Lead Acid & Lithium Nickel - Cobalt - Manganese Oxide Batteries using a Rapid Excitation Signal

An ASIC-Based Miniaturized System for Online Multi-Measurand Monitoring of Lithium-Ion Batteries

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