Battery knowledge · Charging and discharging
Discharge curve
The plot of terminal voltage against delivered capacity at a given current and temperature. Its shape identifies the chemistry — LFP is flat, NMC slopes — and its area is the delivered energy.
- Also called
- voltage curve
Example
Voltage under load
5 A through 20 mΩ gives 0.1 V ohmic drop.
Chosen OCV curve; no chemistry calibration, hysteresis or voltage cutoff.
Explore the graph
Discharge current creates an ohmic drop below open-circuit voltage.
5 A through 20 mΩ gives 0.1 V ohmic drop.
V_terminal = OCV − I_discharge R
Illustrative model. Chosen OCV curve; no chemistry calibration, hysteresis or voltage cutoff.
Use in Lemonergy
Design protocol or analysis tool
Replay a changing load
Replay applies an existing governed profile.
Equation or tool to use
- Dynamic profile
Replays selected power
Inputs & settings
- profileId
- passes
- scaleW
- Rest
Observes recovery
Inputs & settings
- s
This overview identifies the components to use. Follow the example in Lemonergy for their connections and settings.
Example. 40 kW at 400 V needs about 100 A before losses; at 350 V it needs about 114 A.
Observe. Current rises as voltage falls under fixed power.
The selected profile determines regeneration. This is not an independent road-load or motor-efficiency model.
Open Design → Protocol bench →References & further reading
Further reading on this topic
These sources provide broader context; they are not presented as citations for every statement in this entry.
- Lithium-ion battery fast charging: A review
Anna Tomaszewska et al. · eTransportation · 2019
Topic background · CC-CV and alternative charging protocols, transport limitations, degradation and thermal implications; results depend on cell and test conditions. Software behavior is documented separately in Lemonergy block references.