Battery knowledge · Charging infrastructure
DC fast charging
Charging from a station that supplies DC straight to the pack, bypassing the car’s onboard charger, at 50 kW to over 350 kW. The BMS, not the charger, sets the current from moment to moment, which is why the charge curve tapers as the pack fills. [1]
- Abbreviation
- DCFC
- Also called
- rapid charging, HPC
Example
Compare charging profiles
Current holds at 5 A until the example 4.15 V threshold; voltage then holds while current tapers. The stop marker is a separate low-current termination condition.
Positive current charges the cell. Time is normalized; selected thresholds are not cell-specific recommendations. The voltage trace ends at termination; post-stop relaxation is excluded.
Explore the graph
See which quantity is held constant, when the phase changes and how charging ends.
Current holds at 5 A until the example 4.15 V threshold; voltage then holds while current tapers. The stop marker is a separate low-current termination condition.
CC: I = I_set · CV: V = V_limit
Illustrative model. Positive current charges the cell. Time is normalized; selected thresholds are not cell-specific recommendations. The voltage trace ends at termination; post-stop relaxation is excluded.
Use in Lemonergy
Design protocol or analysis tool
Find the charge-time limit
The separate Charge session compares power, current, acceptance and CV limits.
Equation or tool to use
- Charge session
Runs against the selected cell and pack
Inputs & settings
- Source power
- Connector current
- Start / target SOC
- End-of-charge C-rate
This overview identifies the components to use. Follow the example in Lemonergy for their connections and settings.
- Select a rechargeable cell and pack.
- Open Analysis → Charge session; increase power.
Example. A 50 kW source at 400 V cannot deliver 50 kW through a 100 A ceiling; that current limit corresponds to 40 kW.
Observe. Read the named limiting reason.
This differs from the Studio network and requires cell resistance data and product access.
Open Design → Charge session →References & further reading
Technical references
- Electric Vehicle Charging Stations
U.S. Department of Energy, Alternative Fuels Data Center
Technical reference · U.S. charging equipment levels, charging infrastructure and connector context. Regional terminology varies.