2013 BMW i3

2013 BMW i3 battery pack

The 2013 BMW i3 had a battery based on the Samsung 60Ah prismatic cell and a simple pack assembly that integrated into the aluminium / carbon fibre body structure.

Metrics

  • Energy Density
    • Gravimetric = 91 Wh/kg
    • Volumetric = 77 Wh/litre
  • Power Density
    • Gravimetric = 591 W10s/kg
    • = 200 Wcont/kg
    • Volumetric = 499 W10s/litre
  • Usable Energy = 18.8 kWh (total = 21.312 kWh)
    • SoC Window = 88.2%
  • Nominal Voltage = 355.2 V
    • Voltage Range = 393.6V to 259.2V
  • Nominal Capacity = 60 Ah
  • Configuration = 96s 1p
    • Total number of cells = 96
  • Power
    • Peak = 138.9 kW10s
      • Peak current = 409 A10s
    • Regen = 53 kW10s

Charging

  • Maximum DC fast charge power = 47 kW

Structure

  • Pack Mass = 235 kg
    • Cell Mass = 196.8 kg
    • Pack-Cells = 38.2 kg
    • Cell to Pack Ratio = 83.7%
  • Pack Dimensions
    • X = 1660 mm
    • Y = 964 mm
    • Z = 174 mm
  • Pack Volume = 278.4 litres

This post has been built based on the support and sponsorship from: Eatron TechnologiesAbout:EnergyAVANT Future MobilityQuarto Technical ServicesTAE Power Solutions and The Limiting Factor. 

PartQuantityWeight [kg]Total Weight [kg]
Lower Enclosure119.519.5
Enclosure Cover14.54.5
BMS Master10.3620.362
CSC80.101.808
Module825200
Module Fixingsper module0.040.32
BEM/BDU12.6872.687
Vent/Burst Disc10.0980.098
Communications Harness10.0730.073
CSC Harnessper cmc0.1510.151
Cooling133
HV Connector10.2840.284
Total231.8 kg
Note: the part list for the battery pack is missing the seals, thermal interface material and cover fixings.

Cooling

  • Cooling Type = refrigerant

Module

  • Number of Modules in Pack = 8
  • Number of Cells/Module = 12
  • Mass of Module = 25 kg
2013 BMW i3 battery pack exploded view

Cell

  • Samsung
  • Chemistry = NMC111
  • Format = Prismatic
  • Nominal Capacity = 60 Ah
  • Nominal Voltage = 3.7 V
  • Energy = 222 Wh
  • Mass = 2.05kg

Metrics

  • Gravimetric Energy Density = 90.7 Wh/kg
    • Module = 106.6 Wh/kg
    • Cell = 108.3 Wh/kg
  • Volumetric Energy Density = 76.5 Wh/litre
  • Gravimetric Power Density = 591 W10s/kg
    • Continuous = 200 Wcont/kg
  • Volumetric Power Density = 499 W10s/litre
Graphical BMW i3 generations comparison

The BMW i3 battery pack has been upgraded from the 60Ah cell to the 94Ah cell and finally to the 120Ah cell.

This has all been done in the same package envelope.

Leave a Comment