[EVDL List]

Hello,
Here is a link to photobucket showing a picture of the top turn-buckle (4
used).
http://s491.photobucket.com/albums/rr280/Ruckus99/?action=view&current=car026.jpg
Are they strong enough? I haven't seen anybody else do this, so time will
tell. I would have rather had steel, but the hardware store only had
aluminum. The cable is steel. They can be tightened till they sing like a
guitar string. I very much considered the super-heavy-duty zip-ties but
thought the cables would provide more tension and look better. I am not
sure if you can have TOO much tension. The Thundersky manual shows a
compression jig to fix a bloated cell. It is beyond extreme compression.
Have yet to hear of damage from over-compression.

As for which bms? I think it depends on your interest in data-logging and
such. Many controllers do that as well. I have a hard time paying several
grand for a bms. Regardless of the configuration, I believe over/under
voltage events MUST be prevented at a cell level. If it does that it will
be fine. Everything else is icing on the cake.

Marcus

[quote] Martin WINLOW <xxx@xxx.xxx.uk> wrote:

> George,
>
> I don't think the Jubilee (as we call them over here in the UK) or worm
> gear-type clips will exert enough tension - unless you use a lot of them...
> one per cell case groove maybe.
>
> Marcus' cables would be better but I don't know exactly which product he
> is referring to. Plastic strapping is easy and cheap and has the advantage
> of being quite elastic (obviously at considerable tension) and therefore is
> unlikely to cause any damage due to over-tensioning, unlike a steel system.
> My strapping can be seen here...
> http://www.winlow.co.uk/wychwood.co.uk/EV_Conversion_-_Part_2.html
>
> As for BMS', I gather Willie McKemie has some considerable experience of
> that particular product - good and not so, I gather.
>
> Tho I have not tried it, the Elithion's 'Lithiumate Lite' would be my
> choice but it would be somewhat more expensive than the MiniBMS - but much
> more useful in terms of cell monitoring/logging etc.
>
> Sure, between sub-packs, you would have to use braided connects or lengths
> of cable.
>
> Regards, Martin Winlow
> Herts, UK
> http://www.evalbum.com/2092
> www.winlow.co.uk
>
>
> On 27 Jul 2012, at 14:21, George Wagner wrote:
>
> > My battery configuration is 12 under the hatch; 12 under the rear seat
> (this
> > is where the gas tank was in my Pontiac Vibe, so no exhaust, brake, or
> > electical lines ran under the full-span of the seat); and 10 under the
> hood
> > for a total of 34 (pack voltage 120 V).
> >
> > For the two sets of 12, I was planning using the orginal metal bands used
> > for banding (up to groups of six) but joining them with stainless-steel
> > "worm-gear" hose clamps of the same width. The batteries would then be
> > placed one-by-one into the jigs already in the battery box, the bands
> added,
> > and the hose clamps tightened to compress the batteries between the end
> jigs
> > into the 12-pack. So I won't actually need to physically lift the
> > twelve-battery packs at all; they will be assembled directly into each
> > battery box.
> >
> > I appreciate the great idea of inserting a couple of square dowels
> between
> > each battery in the pack to keep them from shifting side-to-side.
> Winston
> > Battery provided solid-copper straps for terminal connections between
> > batteries in a pack. The straps are not long enough to reach over jigs
> to
> > adjacent packs, so this way I will have to fabricate fewer terminal
> > connections than if smaller-size packs were used.
> >
> > For the ten batteries under the hood, I'll probably join the two current
> > five-packs into a single ten-pack, space permitting (I won't know for
> sure
> > until I get the electric motor/tranny in the car).
> >
> > Also good to know that battery-heating in use should not be an issue.
> I'm
> > using the MiniBMS system to keep the batteries in the proper charge
> range.
> >
>
>
>
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--
Marcus Reddish

*North Valley Systems LLC*
Stevensville, Montana
406-360-8628
northvalleyev.com
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|
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