I'm having trouble finding information on how slowly I can charge Li-ion batteries.
Background: I building a device that will need 10-12 Amp current spikes lasting 1.5 seconds every 15 seconds (10% DC), six times in a row, once or twice a day from a single cell. I'm considering a 18650 cell (~2.2k mAh) because they are available and relatively cheap (I would also consider a pouch style) and it could go 2-4 weeks without recharging.
If I use a plug-in charging approach, I can re-charge it at practically any rate I choose; easy to do. However, if it must have an inductive charging design, the charging current will be limited to about 200 mA, or about C/10. Recharging time available is 24 hours and there'll be the proper CC/CV charge circuitry on-board, so this isn't a long-term trickle charge situation.
Can I go that low?
G.
Background: I building a device that will need 10-12 Amp current spikes lasting 1.5 seconds every 15 seconds (10% DC), six times in a row, once or twice a day from a single cell. I'm considering a 18650 cell (~2.2k mAh) because they are available and relatively cheap (I would also consider a pouch style) and it could go 2-4 weeks without recharging.
If I use a plug-in charging approach, I can re-charge it at practically any rate I choose; easy to do. However, if it must have an inductive charging design, the charging current will be limited to about 200 mA, or about C/10. Recharging time available is 24 hours and there'll be the proper CC/CV charge circuitry on-board, so this isn't a long-term trickle charge situation.
Can I go that low?
G.