PSI - Issue 24

Lorenzo Berzi et al. / Procedia Structural Integrity 24 (2019) 408–422 Be zi et al./ Structural Integrity P o edi 00 (2019) 000 – 00

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Fig.13. Flash charge event, adopting a 2-step sequence.

Fig.14. Vehicle test. I TOT vehicle is the whole current on the DC-BUS; I Battery filtered is the current of the battery, filtered with 1 pole transfer function having a time constant of 0.2s to smooth the power request to the converters; I TOT Tame12 is the current provided by the converter on the DC bus. V Supercap is the voltage of the supercapacitors, that for the sequence shown reach its lower possible value.

Table 6. Energy balance of the test shown in Fig.14

Energy delivered (Wh)

% on total needed

Vehicle (Total)

529.9 272.0 257.9

100%

Battery

51% 49%

DC-DC Converters