Limitation of estimation method of current density between battery electrodes by inverse analysis of noisy magnetic field

A high capacitance battery such as a lithium-ion battery is fabricated by interlaminating electrodes and separators. Since the strength of the separator is relatively low, many situations exist where damage in the separator sheet induces an initiation of short circuit or air gap between the electrod...

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Autores principales:	Yoshinao KISHIMOTO, Yukiyoshi KOBAYASHI, Toshihisa OHTSUKA, Takahito TOGO
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2017
Materias:	inverse problem electromagnetic measurement nondestructive inspection battery shell structure laminated construction Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/41e30feac363456bb983a55f0b75a80d
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spelling	oai:doaj.org-article:41e30feac363456bb983a55f0b75a80d2021-11-26T07:11:27ZLimitation of estimation method of current density between battery electrodes by inverse analysis of noisy magnetic field2187-974510.1299/mej.16-00672https://doaj.org/article/41e30feac363456bb983a55f0b75a80d2017-02-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/4/5/4_16-00672/_pdf/-char/enhttps://doaj.org/toc/2187-9745A high capacitance battery such as a lithium-ion battery is fabricated by interlaminating electrodes and separators. Since the strength of the separator is relatively low, many situations exist where damage in the separator sheet induces an initiation of short circuit or air gap between the electrodes. In order to prevent serious incidents by such short circuits and air gaps, it is important to evaluate the electrical contact state of the electrodes through the estimation of the current density between the electrodes. This study has developed a novel estimation method of the current density between the electrodes by the inverse analysis of the magnetic field around the battery, and established the methodology to find the limitation of the proposed method against the noisy magnetic field. In order to numerically investigate the basic behavior and the estimation error of the proposed method, a numerical simulation has been performed by using a single cell model consists of two electrodes and one separator. The correct distribution of the current density between the electrodes was given in advance, and the direct analysis was applied to obtain the simulation data of the magnetic flux density. Then the inverse analysis was applied to the simulation data with artificial disturbances. From the results of the numerical simulation, the followings were summarized: 1) It is confirmed that the possibility of the successful estimation depended on the standard deviation of the artificial disturbance. 2) The reference solution in the inverse analysis affected the selection of the regularization parameter and the estimation error against the standard deviation of the artificial disturbance. 3) The proposed method achieved the successful estimation with 90% probability if the disturbance in the magnetic flux density is less than the 30% as far as this numerical simulation.Yoshinao KISHIMOTOYukiyoshi KOBAYASHIToshihisa OHTSUKATakahito TOGOThe Japan Society of Mechanical Engineersarticleinverse problemelectromagnetic measurementnondestructive inspectionbatteryshell structurelaminated constructionMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 4, Iss 5, Pp 16-00672-16-00672 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	inverse problem electromagnetic measurement nondestructive inspection battery shell structure laminated construction Mechanical engineering and machinery TJ1-1570
spellingShingle	inverse problem electromagnetic measurement nondestructive inspection battery shell structure laminated construction Mechanical engineering and machinery TJ1-1570 Yoshinao KISHIMOTO Yukiyoshi KOBAYASHI Toshihisa OHTSUKA Takahito TOGO Limitation of estimation method of current density between battery electrodes by inverse analysis of noisy magnetic field
description	A high capacitance battery such as a lithium-ion battery is fabricated by interlaminating electrodes and separators. Since the strength of the separator is relatively low, many situations exist where damage in the separator sheet induces an initiation of short circuit or air gap between the electrodes. In order to prevent serious incidents by such short circuits and air gaps, it is important to evaluate the electrical contact state of the electrodes through the estimation of the current density between the electrodes. This study has developed a novel estimation method of the current density between the electrodes by the inverse analysis of the magnetic field around the battery, and established the methodology to find the limitation of the proposed method against the noisy magnetic field. In order to numerically investigate the basic behavior and the estimation error of the proposed method, a numerical simulation has been performed by using a single cell model consists of two electrodes and one separator. The correct distribution of the current density between the electrodes was given in advance, and the direct analysis was applied to obtain the simulation data of the magnetic flux density. Then the inverse analysis was applied to the simulation data with artificial disturbances. From the results of the numerical simulation, the followings were summarized: 1) It is confirmed that the possibility of the successful estimation depended on the standard deviation of the artificial disturbance. 2) The reference solution in the inverse analysis affected the selection of the regularization parameter and the estimation error against the standard deviation of the artificial disturbance. 3) The proposed method achieved the successful estimation with 90% probability if the disturbance in the magnetic flux density is less than the 30% as far as this numerical simulation.
format	article
author	Yoshinao KISHIMOTO Yukiyoshi KOBAYASHI Toshihisa OHTSUKA Takahito TOGO
author_facet	Yoshinao KISHIMOTO Yukiyoshi KOBAYASHI Toshihisa OHTSUKA Takahito TOGO
author_sort	Yoshinao KISHIMOTO
title	Limitation of estimation method of current density between battery electrodes by inverse analysis of noisy magnetic field
title_short	Limitation of estimation method of current density between battery electrodes by inverse analysis of noisy magnetic field
title_full	Limitation of estimation method of current density between battery electrodes by inverse analysis of noisy magnetic field
title_fullStr	Limitation of estimation method of current density between battery electrodes by inverse analysis of noisy magnetic field
title_full_unstemmed	Limitation of estimation method of current density between battery electrodes by inverse analysis of noisy magnetic field
title_sort	limitation of estimation method of current density between battery electrodes by inverse analysis of noisy magnetic field
publisher	The Japan Society of Mechanical Engineers
publishDate	2017
url	https://doaj.org/article/41e30feac363456bb983a55f0b75a80d
work_keys_str_mv	AT yoshinaokishimoto limitationofestimationmethodofcurrentdensitybetweenbatteryelectrodesbyinverseanalysisofnoisymagneticfield AT yukiyoshikobayashi limitationofestimationmethodofcurrentdensitybetweenbatteryelectrodesbyinverseanalysisofnoisymagneticfield AT toshihisaohtsuka limitationofestimationmethodofcurrentdensitybetweenbatteryelectrodesbyinverseanalysisofnoisymagneticfield AT takahitotogo limitationofestimationmethodofcurrentdensitybetweenbatteryelectrodesbyinverseanalysisofnoisymagneticfield
_version_	1718409714579013632

Limitation of estimation method of current density between battery electrodes by inverse analysis of noisy magnetic field

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