What’s inside an electric car Prof. Dr. Pavol Bauer, Delft University of Technology
Key parts of an electric car Transmission Electric Motor Traction Motor Battery bank drive Charger port Battery On-board converter Auxiliary battery charger
Key parts of an electric car
Charging port + connector + cable Charger port
Charging port + connector + cable
Power + Onboard charger flow i 1 i 2 + + V 1 V 2 _ _ control signals On-board charger
Direct Current (DC) Onboard charger Alternating Current (AC)
Traction battery bank Traction Battery bank
• Battery management system Traction battery bank • Typically 10-100 kWh
Battery types Weight of 20kWh battery • Lead acid Lead acid 550 kg • Nickel based: NiMH, NiCd Nickel Cadmium 500 kg • Lithium based : Nickel Metal Hydride 350 kg • Lithium-ion (Li-ion) and • Lithium-polymer (Li-poly) Lithium Ion 180 kg
Power + Battery power converter flow i 1 i 2 + + V 1 V 2 _ _ control signals Battery converter
Battery power converter
Motor drive Motor drive
Bidirectional: Motor drive 1. Driving mode 2. Regenerative braking mode
Transmission Electric Motor Electric traction Motor/Generator + Transmission
Electric Motor/Generator + Transmission
Commonly used electric motor types
Key parts of EV Auxiliary battery Power electronic controller Auxiliary battery
Electric car: Power flow
Electric car: Power flow 12V/48V Auxiliary supply Uni-directional converter for Uni-directional charging converter for auxiliary 1 or 3 Phase AC Supply
Electric car: Power flow Onboard charger
Electric car: Power flow Onboard charger
Electric car: Power flow
What’s inside an electric car Prof. Dr. Pavol Bauer, Delft University of Technology
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