Battery knowledge · Charging and discharging
Boost and top-up charging
A short, partial charge to add range quickly — often only into the part of the SOC window where the cell accepts high current best, typically 10–80 %. Charging above 80 % is slow on any fast charger, so frequent short top-ups are often faster than one long session. [1]
Example
Charging and discharging: an example situation
The same CC–CV law can operate overnight or during a short depot stop.
Read Boost and top-up charging alongside Charging curve in this context. The power a vehicle actually accepts against its state of charge during a fast charge: high at low SOC, stepping down as the cells approach voltage and plating limits. The area under it, not the peak kilowatts, decides how long a stop takes.
Use in Lemonergy
Lemonergy Studio blocks
Charge during available stops
Availability is an independent signal.
Blocks to use
- Physical availability / signal schedule
Defines stop windows
Inputs & settings
- defaultValue
- startS / endS / value
- Charging schedule and target policy
Permits charging
Inputs & settings
- strategy
- targetSoc
- departureS
- soc, available, chargerDone → permit
- Regulated CC/CV charger
Regulates current and voltage
Inputs & settings
- currentA
- voltageV
- cutoffCurrentA / cutoffHoldS
- Electrical ports p and n
- Battery with SOC-dependent OCV
Stores charge and supplies terminal voltage
Inputs & settings
- capacityAh
- initialSoc
- emptyVoltageV / fullVoltageV
- resistanceOhm
- Electrical ports p and n
This overview identifies the components to use. Follow the example in Lemonergy for their connections and settings.
- Inspect availability and preferred windows.
- Shorten a stop.
Example. A 15-minute stop at a 100 kW grid cap has a 25 kWh upper grid-energy bound before losses and battery limits.
Observe. More power cannot recover disconnected time.
All battery and converter limits still apply. A schedule is not an electrochemical law.
Open the Studio example →References & further reading
Technical references
- Lithium-ion battery fast charging: A review
Anna Tomaszewska et al. · eTransportation · 2019
Technical reference · 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.