DC charging of EVs Dr. Gautham Ram Chandra Mouli, Delft University - PowerPoint PPT Presentation

Aug 17, 2022 •384 likes •535 views

DC charging of EVs Dr. Gautham Ram Chandra Mouli, Delft University of Technology Learning objectives What are the key parts of an DC charger? What types of connectors are used for DC charging? What are the limitations of DC fast

DC charging of EVs Dr. Gautham Ram Chandra Mouli, Delft University of Technology
Learning objectives What are the key parts of an DC charger? • What types of connectors are used for DC charging? • What are the limitations of DC fast charging? •
Off-board DC charger
DC Charging: Types
DC Charger types : Overview Image courtesy: Phoenix contact (.phoenixcontact.com); CHAdeMO (chademo.com) CCS US CCS Europe Chademo Tesla US/EU China GB/T standard
DC Charger - CCS/Combo 1 L1 Control L2/N Pilot Proximity Proximity Pilot Pilot Image courtesy: Phoenix contact (www.phoenixcontact.com) Protective Protective Control Earth Earth Pilot DC+ DC- DC+ DC-
DC Charger - CCS/Combo 2 Protective Earth Protective Earth Proximity Control Pilot Pilot Control Pilot Proximity Pilot L1 Image courtesy: Phoenix contact (www.phoenixcontact.com) Neutral L2 L3 DC+ DC- DC- DC+
CCS/Combo 1 & 2 • PLC communication • Vehicle inlet for both AC, DC charging • Max current 350A* • Voltage range: 200-1000V* • Max power: 350kW* * Values are being updated continually
DC Charger - Chademo Ground wire Charge • 3 power pins; Enable/disable • 7 signal pins; • CAN communication By Great Drok (Own work)/CC BY-SA 4.0, via Wikimedia Commons • Chademo 1.0: Charge DC+ DC- 50-500V upto 125A*; start/stop • Future: upto 400kW*; CAN-H Proximity Upto 1000V* Pilot CAN-L * Values are being updated continually
Image courtesy: Phoenix contact (.phoenixcontact.com); By Great Drok /CC BY-SA 4.0, Wikimedia DC Charger - Tesla Protective Earth Power pins Proximity Control Pilot Pilot Control DC+ DC- Pilot DC+ DC- Proximity Pilot DC charging in Europe DC charging in USA Type 2 connector Proprietary connector
Image courtesy: Phoenix contact (www.phoenixcontact.com) DC Charger - China GB/T standard Proximity Pilot • CAN communication CAN-H CAN-L • 5 power pins; • 4 signal pins; • Nominal voltage 750V or 1000V; DC+ DC- • Max Current 250A; Auxiliary Auxiliary Power- Power+ Protective Earth
DC Charging: Limitations
Limitations of DC fast charging Higher losses in charger and battery (I 2 R) • Battery • - Only 70-80% SOC can be charged with fast charging - Shorter battery lifetime based on C-rate Cable • - Limited maximum current for cable that can be easily lifted - Thermal management
DC charging of EVs Dr. Gautham Ram Chandra Mouli, Delft University of Technology

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