High temperatures pose a risk of thermal runaway and increased degradation, and low temperatures significantly reduce useful performance and pose a risk of irreversible degradation such as lithium plating in li-ion systems. A thermal management system must be capable of cooling and perhaps heating the pack effectively and efficiently. A key aspect is monitoring the temperature of cells. We are exploring amongst other areas novel methods of inferring cell temperatures indirectly using impedance measurements, with the prospect of improving the accuracy and safety. We are also interested in model order reduction and development and validation of compact thermal models in a variety of devices and applications, as well as novel calorimetry approaches.
People
Gosia Wojtala, David Howey
Academic collaborators
Prof Peter Ireland (Oxford)
Projects
- “Translational Energy Storage Diagnostics (TRENDs)”, EPSRC project ref. EP/R020973/1.
- “Thermal management of electric vehicle batteries”, EPSRC Doctoral Training Partnership
- “Calibrator for power measurement equipment”, N4L-sponsored project
Recent publications
- R.R. Richardson, Zhao, S., and Howey, D.A., “On-board monitoring of 2-D spatially-resolved temperatures in cylindrical lithium-ion batteries: Part I. Low-order thermal modelling”, Journal of Power Sources, vol. 326, pp. 377-388, 2016
- R.R. Richardson, Zhao, S., and Howey, D.A., “On-board monitoring of 2-D spatially-resolved temperatures in cylindrical lithium-ion batteries: Part II. State estimation via impedance-based temperature sensing”, Journal of Power Sources, In Press, 2016
- D.F. Frost and Howey, D.A., “High-Speed Peltier Calorimeter for the Calibration of High-Bandwidth Power Measurement Equipment”, IEEE Transactions on Instrumentation and Measurement, vol. 65, no. 1, pp. 155-163, 2016
