I got my cells from Cor for about 2 dollars a piece. Two strings of 20 is forty
cells. 80 bucks. 36 for the BMS and 27 for the charger and my time and
soldering/wires. Not much for a 5ah 60v pack. Since Covid I have plenty of
time. Gotta get a hot glue gun. Turns out there is a reason they use the same
diagram for my BMS for all the models. Turns out to save money they used a 16
and a five pin flat cable. I should have counted the pins and it would have
made sense. I was over thinking it not knowing they used two cables to save
money. Probably have millions of 16 and 5 pin cables. Not many 21 pin
connectors thus my confusion. Duh. Should have counted first and not just
looked at the two cables thinking of some exotic connection. It will be a very
simple construction. BTW the Daly company is very big. Plenty of YouTubers have
explained the unit in it's different voltages. Very robust for the money.
Lawrence Rhodes
Message: 4
Date: Thu, 25 Jun 2020 15:26:05 -0400
From: "EVDL Administrator"
To: Electric Vehicle Discussion List
Subject: Re: [EVDL] 20s A123 battery pack for ebike
Message-ID: <5ef4c20d.8518.208f2...@evpost.drmm.net>
Content-Type: text/plain; charset=US-ASCII
On 25 Jun 2020 at 16:35, Lawrence Rhodes via EV wrote:
> So buyer beware. Documentation not included.
Yeah, that costs extra.
If you want instructions for this cheap stuff, you buy the same cheap stuff
from an importer in the West. If you've chosen well, the seller will have
written up reasonably clear instructions. He'll mark up the product to pay
himself for his time. Wouldn't you?
If you're REALLY lucky, maybe he'll even let you call or email with
questions. That might cost still more, heaven forbid.
Sometimes you can find somebody in a web forum who's figured one of these
direct-from-the-sweatshop cheapies out. The time to look for that is BEFORE
you buy. And then you may or may not be able to get the same gadget the
online guy documented. Turnover of these Chinese manufacturers can be
quick, and the regularly re-engineer them to make them cheaper and more
profitable to build.
All this messing around takes time. How much is your time worth? Did you
save enough on the BMS's price to pay for that time?
David Roden, EVDL moderator & general lackey
To reach me, don't reply to this message; I won't get it. Use my
offlist address here : http://evdl.org/help/index.html#supt
= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
I am the one with no secrets. They [the Chinese government] have
secrets. It is only because they have secrets that they can imagine
everyone else having them too.
-- Ai Weiwei
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