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SBB Battery Redesign

- Technisches

In Kooperation mit SBB

Further Innovation:

· Internal 800 W soft charge converter 20 A

· Heating 60 W each cell (+10K in 24 min)

· Fully operation (charging and discharging) -20°C to 45°C

· Space reduction of 50 %

· Controlled chargng operation as flexible as the different board net systems
39 V – 45 V

· Overal less expensive than current solution: Reduced energy consumption and lower life cycle costs due to Wearout-dependent service life thanks to diagnostic system

Die Bordnetz-Batterie im
Vergleich

Features

Battery Status quo

Eval. model BFH

Energy at 3h-discharge

6.1 kWh @ +20°C

2.9 kWh @  -20°C

6.5 kWh @ +20°C

3.5 kWh @  -20°C

Nominal Pack Voltage

36 V (2 x 9 cells)

35.2 V (11 cells)

Technology / Chemistry

Lead-acid (VRLA)

LiFeYPO4 (LFYP)

System weight

334 kg (in 2 troughs)

110 kg (-67%)

Energy density at cell level (3h-discharge)

23 Wh/kg @ +20°C

14 Wh/kg @  -20°C

105 Wh/kg @ +20°C

  71 Wh/kg @  -20°C

Lifetime at given profile

5-8 Years
(preventative swap)

12 – 20 Years 
(wearout-dependent)

acquisition costs

CHF 2'500.-

CHF 4'500.-

Diagnostics, Monitoring, Features

-Charging is controlled by external charger without taking care of battery's health -Charger meassures temperature in battery-room only

Internal intelligence:

-Monitoring of voltage and temperature even on cell level -current monitoring -Semiconductor-Main switch