Battery knowledge · Charging and discharging
Regenerative braking
Using a vehicle’s motor as a generator while slowing down, so braking energy charges the battery in short high-current pulses. A cold or full battery cannot accept it, which is one reason a BMS computes charge power limits continuously.
Example
Charging and discharging: an example situation
The same CC–CV law can operate overnight or during a short depot stop.
Read Regenerative braking alongside Electric vehicle in this context. A vehicle driven by an electric motor from a battery charged from the grid. A battery electric vehicle has no engine; it is the largest market for lithium-ion cells and the driver of most pack technology.
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.