MrM1
I'm Here, But I'm Not All There
I know when top balancing multiple cells in parallel the rule of thumb is to
- 1st set the bench top power supply to 3.65v
- Then connect the power supply to the battery posts , preferably with hi quality leads
But when I do this and the paralleled group of cells is at a low state of charge, the voltage at the cells is much lower than the voltage at the charger
Actually, the charger reads 3.65v, but at the lead connection at the charger it will be less and at the battery postsoof the group it will be even less. Like if I start the charge with the group at 3.29v, the voltage at the cells might read 3.295v or whatever.
As the charge cycle continues (for days with a 10 amp supply) batteries might be at 3.35v for a long time. But the charge amps really start to drop off
Question. Other than it being risky because you may walk away and forget, only to return to a room full of ballooned cells, why is it bad to increase the voltage on the charger to say 3.7v or 3.8v to get the amps up to 10 amps AS LONG AS the volts at the cell posts are not over 3.5 or 3.6v. I know when it hits the knee it will run like crazy, so it risky, but does it hurt the cells early on to increase the volts at the charger display so that you are getting max amps as long as your not exceeding 3.5-3.6v at the cell's posts.
Just wondering.
- 1st set the bench top power supply to 3.65v
- Then connect the power supply to the battery posts , preferably with hi quality leads
But when I do this and the paralleled group of cells is at a low state of charge, the voltage at the cells is much lower than the voltage at the charger
Actually, the charger reads 3.65v, but at the lead connection at the charger it will be less and at the battery postsoof the group it will be even less. Like if I start the charge with the group at 3.29v, the voltage at the cells might read 3.295v or whatever.
As the charge cycle continues (for days with a 10 amp supply) batteries might be at 3.35v for a long time. But the charge amps really start to drop off
Question. Other than it being risky because you may walk away and forget, only to return to a room full of ballooned cells, why is it bad to increase the voltage on the charger to say 3.7v or 3.8v to get the amps up to 10 amps AS LONG AS the volts at the cell posts are not over 3.5 or 3.6v. I know when it hits the knee it will run like crazy, so it risky, but does it hurt the cells early on to increase the volts at the charger display so that you are getting max amps as long as your not exceeding 3.5-3.6v at the cell's posts.
Just wondering.