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

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Aug 17, 2022 384 likes •541 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

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DC charging of EVs

Dr. Gautham Ram Chandra Mouli, Delft University of Technology

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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?

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Off-board DC charger

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DC Charging: Types

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DC Charger types : Overview

CCS US CCS Europe Chademo Tesla US/EU China GB/T standard

Image courtesy: Phoenix contact (.phoenixcontact.com); CHAdeMO (chademo.com)

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DC Charger - CCS/Combo 1

Image courtesy: Phoenix contact (www.phoenixcontact.com)

DC+ Proximity Pilot Control Pilot DC- Protective Earth L2/N L1 Proximity Pilot Control Pilot Protective Earth DC+ DC-

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DC Charger - CCS/Combo 2

Image courtesy: Phoenix contact (www.phoenixcontact.com)

Protective Earth Control Pilot Proximity Pilot DC+ DC- Control Pilot Proximity Pilot L1 L2 L3 Protective Earth Neutral DC- DC+

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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

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DC+ DC- Charge start/stop Proximity Pilot Charge Enable/disable Ground wire CAN-L CAN-H

DC Charger - Chademo

By Great Drok (Own work)/CC BY-SA 4.0, via Wikimedia Commons

3 power pins;
7 signal pins;
CAN communication
Chademo 1.0:

50-500V upto 125A*;

Future: upto 400kW*;

Upto 1000V*

* Values are being updated continually

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DC Charger - Tesla

DC charging in Europe Type 2 connector DC charging in USA Proprietary connector

Proximity Pilot Control Pilot Power pins

Image courtesy: Phoenix contact (.phoenixcontact.com); By Great Drok /CC BY-SA 4.0, Wikimedia

Control Pilot Proximity Pilot DC- Protective Earth DC+ DC+ DC-

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DC Charger - China GB/T standard

Image courtesy: Phoenix contact (www.phoenixcontact.com)

CAN communication
5 power pins;
4 signal pins;
Nominal voltage 750V or 1000V;
Max Current 250A;

DC+ DC- CAN-L CAN-H Proximity Pilot Protective Earth Auxiliary Power+ Auxiliary Power-

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DC Charging: Limitations

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Limitations of DC fast charging

Higher losses in charger and battery (I2R)
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

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DC charging of EVs

Dr. Gautham Ram Chandra Mouli, Delft University of Technology