Browse Publications Technical Papers 2020-01-0441
2020-04-14

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.

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