[PSUBS-MAILIST] Batteries

via Personal_Submersibles personal_submersibles at psubs.org
Wed Nov 23 16:30:41 EST 2016


Alan,

I just have it hard wired into the submarine electrical system. A simple switch turns it on and off. 

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 15:07
>  
>  Scott,
>  already sold my house & living in a cardboard box. (well small unit)
>  But where could you buy an education or experience like we are
>  getting?
>  I had a look at a video on the CDK-6 conversion kit. It says you
>  have to unscrew the fitting from the SSB 2010 unit to turn off the
>  power!
>  Normally for a diver the power comes on automatically when the unit is
>  underwater.
>  Did you put a switch on this or were you still screwing-unscrewing to
>  turn the power on & off. Or did you wire the unit to your submarine
>  battery supply.
>  Also when mounting the transducer where is the best position?
>  If you mount it low you would have communication through it on the
>  surface,
>  or is this distorted in wavy conditions.
>  If you mount it high you would have less interference. Yes?
>  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 9:18 AM
>  SUBJECT: Re: [PSUBS-MAILIST] Batteries
>  
>  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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