Please drill this comment down a bit more. I was (told, informed, educated) that charging at 30 amps instead of 40 amps would put less strain on - battery cooling system, circuit breakers, cords...Lower charge rate is preferable to High charge rate for electronic life. If you have all night, why rush it?
Now, along comes this message - charge as fast as you can, not for the time waiting for a full tank, but because the battery likes it.
Please tell me what is the "best" way for charging.
from the Dahn lecture replies:
databeestje1 year ago
Explanation why temperature is a problem @
4:00 Why fast charging is a good idea @
24:30
1
Lance Pickup9 months ago
"Why fast charging is a good idea" I don't think that's what he's saying at all (although subsequently it has been shown that fast charging can have a beneficial effect sometimes). I think what he's saying is that the way battery testing is normally done, there is no pause between charge/discharge, so if you test using fast charging you get a lot of cycles in in a short amount of time, which doesn't leave a lot of time for the parasitic reactions that would diminish battery capacity to occur. If you were to pause after the charge/discharge and just wait the equivalent amount of time that you would've while doing a slow charge, the effect on the battery for each of the two charging schemes would be roughly the same (which he also shows the data for). Furthermore, consider that he is showing data for which charging takes place at a carefully controlled (and possibly elevated) temperature. As he says (and you referenced), temperature has a dramatic negative effect on battery life, and for a typical user, fast charging will elevate the temperature of the battery more than slow charging, so the net effect is that fast charging, in actual practice, would be worse for you, unless you took steps to actively cool the battery and also immediately used your battery followed by immediately charging your battery repeatedly.