02-19-2022, 11:33 AM
Perhaps an overly aggressive battery protection map
I recently saw a video of a fully charged 18650, pierced by nail
Spit sparks, turned red hot (fully discharged bats will NOT do this, they don't contain so much energy)
The protections goes as so:
Under safe/undamaged level will refuse to charge (??..2.0V ..?)
Very low (?..2.7-2.8V..?) trickle charge,, C/100, for up to 30 min
When reaches safe level ((?..3.4-3.5V..?) goes to full charge rate
In this case, the charger rate is the limit, can only go to C/3 or C/4
Maybe the load on a flat battery drives the V down to trickle charge rate which will not run computer
Normal range for LiCoO is 3.6-4.2V
I recently saw a video of a fully charged 18650, pierced by nail
Spit sparks, turned red hot (fully discharged bats will NOT do this, they don't contain so much energy)
The protections goes as so:
Under safe/undamaged level will refuse to charge (??..2.0V ..?)
Very low (?..2.7-2.8V..?) trickle charge,, C/100, for up to 30 min
When reaches safe level ((?..3.4-3.5V..?) goes to full charge rate
In this case, the charger rate is the limit, can only go to C/3 or C/4
Maybe the load on a flat battery drives the V down to trickle charge rate which will not run computer
Normal range for LiCoO is 3.6-4.2V