1. Electric car battery management Project work spring 2013 Roope Savolainen Joel Saastamoinen Kai Bredenberg

2. Background 2 Fiat Doblo electric cars bought from Fortum 30kW about 100km/h only 2000 km driven Cars broken and sold to Aalto University A Master thesis done about the topic

3. Goals Check the condition of batteries Install batteries in the car and check that the battery management system works Try to fix battery charging system

4. Batteries Battery type: 3,2 V LiFePO4 / 160 Ah Charging voltage: 4 V Battery voltage should never decrease under 2.5 V About 54-66 batteries in series

5. Battery Management System Communication with computer through serial port Car dosen’t work if any of the batteries are empty

6. Charging System Charging voltage: 216 V (input three phase 50 Hz 400 V) System dosen’t work No specifications or documentation available