On 3/14/2021 5:18 AM, Willie via EV wrote:
His primary point was that bottom balanced voltage would drop off so perspicaciously as the battery neared full discharge that there was little risk of ignoring a few low cells as might be the case with top balancing.
By "solving" the issue of torturing cells during full discharge, you ignore another, far more serious problem of torturing cells during charge.
Cells in a pack, _never_ have equal capacity. What happens to the one or two, grossly overly full, over-voltage cells, when you recharge this "bottom balanced" pack? Typically, charging occurs on an unattended car, perhaps while you are asleep in your bedroom over the garage.
This also assumes that the "bottom balanced" cells will stay in this "bottom balanced" condition, which has been shown countless times to be incorrect. Batteries are never perfect in any respect.
A quote from The Breakfast Club: "Screws fall out. The world is an imperfect place."
Bill D. _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/ LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org
