[PSUBS-MAILIST] Batteries
via Personal_Submersibles
personal_submersibles at psubs.org
Wed Nov 23 15:18:07 EST 2016
Thank you for the in Alan. I am quickly finding that nothing in deep sea vehicles is cheap. haha. Thrusters for $68,000. Tracking system for $53,000. Pressure testing for $26,000. Comms for $29,000. So yup, I'm selling my house and gonna live in a cardboard box, but at least I'll have fun doing it. haha
Thank you,
Scott Waters
> -------Original Message-------
> From: Alan James via Personal_Submersibles <personal_submersibles at psubs.org>
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] Batteries
> Sent: Nov 23 '16 14:05
>
> Scott,
> if you do a google image search on lithium iron "internal" or
> "assembly"
> or something like that, you find lots of variations. Some are
> cylinders
> stacked inside a square container, sometimes stacked vertical,
> sometimes
> horizontal; so lots of air pockets. Others are plates.
> In the case of SWE the battery internals can take massive pressure,
> but
> you couldn't guarantee that with every battery on the market. I would
> assume they could but wouldn't be positive.
> If I were doing a hack I would get a dead battery of the type I was
> looking
> at & cut the top off to see how I would do it. (did that with my AGM
> battery hack)
> You could possibly take the tops off the batteries or drill holes in
> the
> tops of every cell to let any air escape when you oil filled them.
> Then
> put your battery pack in a box with a neoprene diagphram over the top
> & oil fill.
> Like Hank is intending to do, or they do with the Deep Sea Power &
> Light
> Sea Battery (AGM).
> My lithium batteries don't have individual cel balancing electronics
> that I
> can see. Some have them external to the battery. All I required was a
> 48V
> battery charger if I was assembling 4 x 12V into a 48V pack.
> Hugh's batteries were a bit more complex & he had a bad experience
> through
> not regularly charging them.
> Having said all that, when I talked with SWE I believe they were
> applying
> for ABS type approval, or something similar. If you are wanting
> certification
> you may get knocked back on a lithium battery hack.
> If it were me I would go & see them & pick their brains. You may find
> out
> how to do it yourself, or they may do a good deal for you.
> I am building my own thrusters to save money, but some times it's
> cheaper
> to buy it off the shelf when you cost out your time & the resultant
> inferior product. :)
> Cheers Alan
>
> -------------------------
> FROM: via Personal_Submersibles <personal_submersibles at psubs.org>
> TO: Personal Submersibles General Discussion
> <personal_submersibles at psubs.org>
> SENT: Thursday, November 24, 2016 7:19 AM
> SUBJECT: Re: [PSUBS-MAILIST] Batteries
>
> Thank you for that info Alan. I am sure they charge plenty for it
> being pre-fabed for underwater work. I was hoping to take lithium car
> batteries and see if there was a way to oil compensate them.
>
> Thank you,
> Scott Waters
>
> > -------Original Message-------
> > From: Alan James via Personal_Submersibles
> <personal_submersibles at psubs.org>
> > To: Personal Submersibles General Discussion
> <personal_submersibles at psubs.org>
> > Subject: Re: [PSUBS-MAILIST] Batteries
> > Sent: Nov 23 '16 12:05
> >
> > Scott,
> > these people sell sub sea lithium battery packs. I spoke with them
> at
> > the
> > underwater intervention convention a couple of years back.
> > They gave me a T shirt :)
> > Southwest Electronic Energy Group (SWE) | Custom advanced battery
> > solutions for the oil and gas industry SWE | Southwest Electronic
> > Energy Group
> >
> > SOUTHWEST ELECTRONIC ENERGY GROUP (SWE) | CUSTOM ADVANCED BATTERY
> > SOLUTIONS...
> >
> > Southwest Electronic Energy Group (SWE) designs and builds custom
> > advanced battery solutions for oil and gas, se...
> >
> > -------------------------
> > FROM: via Personal_Submersibles <personal_submersibles at psubs.org>
> > TO: PSUBS <personal_submersibles at psubs.org>
> > SENT: Thursday, November 24, 2016 6:46 AM
> > SUBJECT: [PSUBS-MAILIST] Batteries
> >
> > Does anyone on psubs have experience in oil compensating lithium
> > batteries? The only time I have known this to happen is in James
> > Cameron's deep sea challenger. I have tried to get answers from
> their
> > engineering staff, but have had no luck so far.
> >
> > Thank you,
> > Scott Waters
> > _______________________________________________
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>
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