Green, J.E. orcid.org/0000-0001-9884-4954, Stone, D.A. orcid.org/0000-0002-5770-3917, Foster, M.P. et al. (1 more author) (2015) Spatially Resolved Measurements of Magnetic Fields Applied to Current Distribution Problems in Batteries. IEEE Transactions on Instrumentation and Measurement , 64 (4). pp. 951-958. ISSN 0018-9456
Abstract
This paper presents a novel instrumentation system for spatially resolved measurements of steady-state and slowly time-varying magnetic fields. The instrumentation system has a measurement area of 400 mm × 200 mm consisting of 256 magnetic pixels each measuring the magnetic field crossing the center of the pixel area as three orthogonal vectors. The specified minimum resolution of our chosen sensor is approximately 1.0 × 10-7 T and the maximum specified measurable magnetic field is 8.0 × 10-4 T. Magnetic field data can be recorded at approximately one frame per second. This paper also reports the application of this instrumentation system to measurements on lead acid batteries and hybridized battery ultracapacitor combinations. The objective of this paper is to infer, for the first time, the moving charge distribution inside the battery volume by measuring the magnetic field resulting from the moving charge. Empirical tests are reported which show the current distribution as a function of increasing distance down the plate away from the terminal is highly likely to be exponential in nature, with most current flowing in the uppermost portion of the battery.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2014 IEEE. This is an author produced version of a paper subsequently published in IEEE Transactions on Instrumentation and Measurement. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Biot-Savart; current distribution; inverse problem; magnetic field measurement; magnetorestive sensor |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Electronic and Electrical Engineering (Sheffield) |
Funding Information: | Funder Grant number ENGINEERING AND PHYSICAL SCIENCE RESEARCH COUNCIL (EPSRC) EP/L017563/1 ENGINEERING AND PHYSICAL SCIENCE RESEARCH COUNCIL (EPSRC) EP/H050221/1 GCHQ (GOVERNMENT COMMUNICATIONS HEADQUARTERS) 4164974 QINETIQ UNSPECIFIED QINETIQ, FARNBOROUGH (DERA) 3000201990 DEFENCE SCIENCE AND TECHNOLOGY LABORATORY DSTLX1000063361 QINETIQ LIMITED, UK DSTLX-1000067064 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 26 Jul 2017 08:58 |
Last Modified: | 23 Mar 2018 05:11 |
Published Version: | https://doi.org/10.1109/TIM.2014.2362432 |
Status: | Published |
Publisher: | IEEE |
Refereed: | Yes |
Identification Number: | 10.1109/TIM.2014.2362432 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:118815 |