48 V High-power Battery Pack for Mild-hybrid Electric Powertrains 2020-01-0441
Mild hybridisation, using a 48 V system architecture, offers fuel consumption benefits approaching those achieved using high-voltage systems at a much lower cost. To maximise the benefits from a 48 V mild-hybrid system, it is desirable to recuperate during deceleration events at as high a power level as possible, whilst at the same time having a relatively compact and low cost unit.
This paper examines the particular requirements of the battery pack for such a mild-hybrid application and discusses the trade-offs between battery power capabilities and possible fuel consumption benefits. The technical challenges and solutions to design a 48 V mild-hybrid battery pack are presented with special attention to cell selection and the thermal management of the whole pack. The resulting battery solution features a continuous-power capability of more than 10 kW and a peak-power rating of up to 20 kW.
The paper will present the results from testing of the prototype pack which is currently underway.
Jonathan Hall, Stephen Borman, Benjamin Hibberd, Michael Bassett, Simon Reader, Martin Berger