[PSUBS-MAILIST] Batteries

Wed Nov 23 16:05:55 EST 2016

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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>  > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>  
>  >
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