FlightPower Cell Balancing
Cell balancing (as oposed to cell matching) is the process of
equalising the voltages of each cell in a pack. The open-circuit
voltage of each cell and during charging is normally a good analogy
to the state of charge. Equalising the charge state and resisting /
preventing overcharging at the cell level is good maintenance
practice and will normally result in improved performance, improved
cycle life and increased safety.
Balancing Methods:
- Manual, using the appropriate FlightPower Diagnostic
lead it is possible to charge and discharge cells individually
as "1S" using a charger with a discharging function or another
low current DC load. Match voltages with a meter.
- Using a cell balancer module. A cell balancer of the
type offered by FlightPower is a true equalising balancer. This
means that it will analyse the charge state of each cell in the
pack whether on charge or not, and then attempt to discharge any
cell that has a higher voltage than the lowest common
denominator. This type will also attempt to discharge any cell
that exceeds 4.21V. Using this kind of balancer, the pack is
charged through the main power leads.
- Pass-through balancer. This kind of balancer performs
in a similar manner to the cell balancer module except that the
during charging the balancer is connected to the balancer and
the balancer manages the charging of each cell individually.
This kind of balancer is able to switch off the current to any
cell exceeding 4.21V to prevent overcharging.
- Balancing charger. A balancing charger charges the
pack through the balancer connector and not through the main
power leads. Each cell is charged individually and overcharge
protection is inherent to the charge method.*Note, please check
the final voltage delivered by some budget balancing chargers
and ensure the pack is taken off charge as soon as it is at
4.21V per cell.
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