I like Bill's "trust the science" analogies, too :) And I know someone
who thinks the moon landing was simulated (with amazing graphics
software we had back in the '60s) and that he can prove that the earth
is not round.
As for bottom vs top, it just seems that the logistics for bottom
balancing would be very difficult. It's easy to carefully charge to max
voltage, but it's very hard to discharge to the bottom voltage. You
would have to start with a nearly empty pack and then discharge it
before recharging, I think.
Peri
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------ Original Message ------
From: "Willie via EV" <[email protected]>
To: [email protected]
Cc: "Willie" <[email protected]>
Sent: 13-Mar-21 8:18:13 AM
Subject: Re: [EVDL] Bottom balancing batteries
On 3/13/21 4:00 AM, Bill Dube via EV wrote:
Trust the science. Trust that the OEMs would not spend an extra penny on a
BMS if they did not have to. Believe that you will have a fire that could very
well burn down your house if you forgo a BMS.
A very good support; I had intended to respond but it was too late when I
noticed. You did a FAR better than I would have. We've had quite a few here
advocating bottom balancing. Most seem to have silently disappeared without
reporting what ever problems they may have encountered.
I was going to suggest that putting all cells in parallel before discharging
down to minimum voltage was a very easy and effective way to precisely bottom
balance.
I have not had patience to wait out most of Jack Rickard's videos but do
remember a very early one touting bottom balancing. 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.
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