You run Constant Current at up to C_Rating_MAX up until the current drops by about 1/10 - 1/20, then you swap to C_Voltage.
It's not like this. Constant current means constant current. The current is constant, set by the charger. It won't drop to 1/10 or 1/20 because in constant current mode it won't drop at all!
What happens is that you charge with constant current and as you do so the cell voltage climbs. Eventually the cell voltage reaches the set voltage limit (4.2 V) and the charger automatically switches to constant voltage for the remainder of the charge, and
then the current starts falling. This is where you wait for the current to fall to say, 5% of the initial value, and then you can stop the charge.
You can mess with the change-over point
Except you have no control over the change-over point. The charger decides this based on the voltage and current settings you use.
, but if you stay at a higher current, you WILL reduce cycle life and have reduced capacity.
Again, you can't stay with the higher current unless you exceed the maximum charging voltage, which you (which the charger) is not supposed to do.
But MOST important is the amount of BULK energy you put into the battery !!
That figure varies per battery type, and how fast you charge it, but it may be around Capacity (C) +20%
Really not. The charging efficiency of lithium ion is fairly close to 100% and does not vary a lot with the charge rate.
In other words - many types of LiION can NOT be trickle charged after bulk energy limit is reached. You can degrade cycle life at a rapid
rate or worse, have a melt-down. It's not worth the risk.
This isn't what happens. You charge until the end of the CV phase, and
then you stop charging. If you mean it is harmful to keep charging a fully charged battery, then of course this is bad. Don't do that!
Your best bet it to work out how long it will take to top-up at the CV point, which should be pretty constant, and put in a timer shut-off.
All dedicated LiION chips have CC-CV, Capacity and Temp profiles included.
It always pays to watch the charging process and make sure it is going to plan. The advantage of a bench power supply is you can see the voltage and current readout on the screen throughout the charging process. You can therefore see if anything is not working much more easily than with a "black box" charger.
Temperature is not part of a typical lithium ion charging algorithm, other than to detect excessively high temperatures as a fail safe and abort the charge if so.