Chevy Volt The Electrification of the Automobile Electric Drive Systems and Components

Electric Drive Software and Controls Safety Critical System: Torque and Direction Security Processor checks, High voltage checks, Torque response error checks Fail-soft actions to maximize system fault tolerance 600 specific system and component diagnostics Integrated Computer Network: >10 processors networked 3 high speed communication links Hybrid System Functional Domain Real time optimizer engine, motors, battery, drive unit Engine Start/Stop control By-Wire blending of regenerative and friction braking Actively dampen driveline Switch current to motors for best torque/efficiency

Battery Pack/Cell Automotive Life Battery systems with >10yr / 150k mile life High capability pack thermal systems HV interconnections, monitoring, control Automotive Costs Large format cells new chemistry and materials Automotive volume manufacturing systems Smart integration of thermal and control functions Automotive Safety Safe cell, safe pack, safe monitoring, safe control

Electric Traction Motors High Torque / Power / Efficiency Motors designed with modern magnetic FEA tools Motors designed as integrated part of a electric drive with interconnections, thermal and Rotor-Stator GDT Automotive Cost Low cost components and production methods PM motors use rare earth types magnets Low cost position sensor or sensor-less

Advanced Propulsion Technology Cost Reduction Enabled through Generational Learning Limitedcost reduction opportunities within a given design generation 00 Some efficiencies gained through increased volume 5 Significant cost reduction enabled through generational changes 50 based on in-use experience

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