A comprehensive heat generation study of lithium titanate oxide-based lithium-ion batteries

Seyed Saeed Madani*, Erik Schaltz, Søren Knudsen Kær, Carlos Ziebert

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Abstract

A precise interpretation of lithium-ion battery (LIB) heat generation is indispensable to the advancement and accomplishment of thermal management systems for different applications of LIB, including electric vehicles. The internal resistance of a lithium titanate oxide (LTO)-based LIB was determined at different state of charge (SOC) levels and current rates to understand the relationship between internal resistance and heat generation. Random and different pulse discharge current step durations were applied to consider the effect of different SOC interval levels on heat generation. The total generated heat was measured for different discharge rates and operating temperatures in a Netzsch IBC 284 calorimeter. It was seen that a 6.7% SOC decrease at high SOC levels corresponds to 0.377 Wh, 0.728 Wh, and 1.002 Wh heat generation for 26A, 52A, and 78A step discharge, both at 20 °C and 30 °C. However, a 1.85% SOC decrease at medium SOC levels corresponds already to 0.57 Wh, 0.76 Wh, and 0.62 Wh heat generation. It can be inferred that the impact of SOC level on heat generation for this cell is more prominent at a lower than at a higher SOC.

OriginalsprogEngelsk
Artikelnummer012004
BogserieJournal of Physics: Conference Series
Vol/bind2382
Udgave nummer1
ISSN1742-6588
DOI
StatusUdgivet - 2022
Begivenhed23rd International Conference on Advanced Batteries, Accumulators and Fuel Cells, ABAF 2022 - Brno, Tjekkiet
Varighed: 21 aug. 202224 aug. 2022

Konference

Konference23rd International Conference on Advanced Batteries, Accumulators and Fuel Cells, ABAF 2022
Land/OmrådeTjekkiet
ByBrno
Periode21/08/202224/08/2022

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© 2022 Institute of Physics Publishing. All rights reserved.

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