Imperial College London

Professor Nigel Brandon OBE FREng

Faculty of Engineering

Dean of the Faculty of Engineering



+44 (0)20 7594 8600n.brandon Website




2.06Faculty BuildingSouth Kensington Campus






BibTex format

author = {Merla, Y and Wu, B and Yufit, V and Brandon, NP and Martinez-Botas, R and Offer, G},
doi = {10.1016/j.jpowsour.2016.09.008},
journal = {Journal of Power Sources},
pages = {224--231},
title = {Extending battery life: A low-cost practical diagnostic technique for lithium-ion batteries},
url = {},
volume = {331},
year = {2016}

RIS format (EndNote, RefMan)

AB - Modern applications of lithium-ion batteries such as smartphones, hybrid & electric vehiclesand grid scale electricity storage demand long lifetime and high performance which typicallymakes them the limiting factor in a system. Understanding the state-of-health during operationis important in order to optimise for long term durability and performance. However, thisrequires accurate in-operando diagnostic techniques that are cost effective and practical. Wepresent a novel diagnosis method based upon differential thermal voltammetry demonstratedon a battery pack made from commercial lithium-ion cells where one cell was deliberately agedprior to experiment. The cells were in parallel whilst being thermally managed with forced airconvection. We show for the first time, a diagnosis method capable of quantitativelydetermining the state-of-health of four cells simultaneously by only using temperature and 2voltage readings for both charge and discharge. Measurements are achieved using low-costthermocouples and a single voltage measurement at a frequency of 1Hz, demonstrating thefeasibility of implementing this approach on real world battery management systems. Thetechnique could be particularly useful under charge when constant current or constant power iscommon, this therefore should be of significant interest to all lithium-ion battery users.
AU - Merla,Y
AU - Wu,B
AU - Yufit,V
AU - Brandon,NP
AU - Martinez-Botas,R
AU - Offer,G
DO - 10.1016/j.jpowsour.2016.09.008
EP - 231
PY - 2016///
SN - 1873-2755
SP - 224
TI - Extending battery life: A low-cost practical diagnostic technique for lithium-ion batteries
T2 - Journal of Power Sources
UR -
UR -
VL - 331
ER -