Product
Batteries
In partnership with Alelion Batteries, all vehicles from EV Adapt are equipped with state-of-the-art Lithium Iron Phosphate batteries.
Cell Welding
Alelion Batteries production facility has three resistive welding stations.
During 2010 Alelion will have the capacity to weld 1.5 million cells per year and work shift.
Battery Pack
Cells are bound together using resistive welding.
EV-packs are based on 16 cells connected in parallell using brass plates.
Each EV-pack has the capacity of 160Wh and 3.2V nominal.
Each car has 96 packs or 1500 cells.
1500 cells weigh 125 kg.
Battery "Ruler"
Packs are welded together forming strings of packs or ”rulers”.
Ruler BMS
– Measure voltage
– Measure temperature
– Passive balancing
– Serial com-link
– Battery Heater
on each battery module.
Each ruler is connected to the central BMU via the serial com-link.
500EV Batteries
General
Chemistry: Lithium Iron Phosphate (=LFP)
Total Capacity: 15360Wh
Voltage: Nominal 102.4VDC
Cont. Discharge Current: 150A
Peak Discharge Current: 450A
Topology
The Battery is based on three parallell strings with 5kWh per
string. Each string is based on 32 LFP cell stages. (50Ah nominal) each cell stag is built on 16 cylindrical cells containing nominally 10Wh per cell.
Balancing & Control
Cell Balancing
System level Battery Control via CAN
SOC % calculation (available thru CAN)
Cell and Battery Voltage Measurements (available thru CAN)
Battery Safety
The batteries are
1. Fused
2. Breakers on both + and – connections
3. Monitored for safety on temp, volt, isolation
The mECU, iECU, the inverter, the Fiat and the battery itself must be in ”INTEGRITY MODE OK” before the battery will enable power out from the battery-enclosure itself.
FIAT 500EV battery is built from two battery units
– Main battery
– Aux battery
The two units have
– Ability to detect isolation fault to chassie
– Measure battery current
– High-current breakers on both plus and minus
– Temperature measurement on all voltage stages
– CAN interface