Magna Steyr, the vehicle engineering, assembly and component provider, is developing a series of lithium-ion energy storage systems for a range of hybrid electric vehicle applications including mild (10-30kW); full (30-70kW—also for use with a fuel cell vehicle); and heavy duty (70-200 kW).
In a presentation at AABC 07, Peter Pichler, Product Manager for Battery Systems at Magna Steyr, said that the company will put its lithium-ion packs into series production in 2009, and that it is developing a pack for plug-in hybrids using prismatic cells (the current cells are cylindrical) with a 2010 target.
The current li-ion energy storage system (ESS) prototype for mild hybrids has 36 4 Ah cells and a nominal voltage of 115V. Peak power is 15 kW. The pack uses air cooling.
The ESS packs for the full-hybrid and the heavy-duty hybrids are liquid cooled (water/glycol). The larger packs are built with 10-cell modules. Magna Steyr has been working with Saft cells, although it is evaluating cells from other providers as well. The ESS for the full hybrid consists of 10 modules. The has an energy capacity of 2.9 kWh.
Magna Steyr is pushing to increase the power and reduce the size of the final production module, compared to earlier versions.
|Specifications for Magna Steyr Full Hybrid Li-ion ESS|
|Early sample||Production target|
|Power||60 kW||70 kW|
|Energy capacity||2.9 kWh||2.9 kWh|
|Voltage range||200V - 410V||200V - 410V|
|Weight||80 kg||60 kg|
|Volume||102 liters||75 liters|
The 70 kW full hybrid ESS is currently integrated in Magna’s full hybrid demonstrator, HySUV.
The 200 kW heavy-duty pack currently has a capacity of 7 kWh and nominal voltage of 630V. It weighs 230 kg, and has a volume of 350 liters.