[PSUBS-MAILIST] (no subject)

Tue Mar 10 01:34:07 EDT 2020

would be nice to increase the run time on the sub 10 fold.
Rick

On Mon, Mar 9, 2020 at 6:43 PM Alan via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Rick,
> they will come in all sorts of sizes, & you can always add lead.
> With the added power you could run an Airconditioner which would be a
> real benefit in Hawaii.
> Anyway we'll see how this plays out. They are doing trials on electric
> vehicles this year.
> Alan
>
>
> On 10/03/2020, at 5:23 PM, Rick Patton via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> I know that battery technology has come a long ways since Ketteredge
> designed the K-350 but unfortunately I am kind of stuck with the size and
> weight of the 12 volt wet cell battery due to the size of the battery pods
> and the weight of the battery's he used to come up with the balance and
> trim of the sub etc. If these new batteries were similar in size and
> weight, that would be awesome but I doubt they will be. Thanks for the
> thought though.
> Rick
>
> On Mon, Mar 9, 2020 at 12:26 PM Alan via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>> Rick,
>> depending on where you are at with your build you may want to factor in
>> new upcoming battery technology.
>> The lithium sulphur battery has 4-5 times the energy density of a lithium
>> iron
>> battery & will be much cheaper. So you would go 20 times further on them
>> than
>> with your lead acid batteries.
>> The energy density has been proven for years but there has been a
>> problematic
>> degrading of the cathode due to gunk ( polysulphides) building up on
>> them, that
>> results in a low number of charging cycles.
>> A large number of universities & corporations World wide have been
>> spending billions
>> on research to overcome this problem & it looks like Monash University in
>> Australia
>> has an answer. They say they will be in production in 2 years.
>> So you may want to buy cheap lead acids & a cheap charger now with view to
>> upgrading when the lithium sulphur batteries hit the market. They require
>> a balance
>> charger that monitors individual cels.
>> Alan
>>
>> https://www.downtoearth.org.in/video/energy/world-s-most-efficient-lithium-sulphur-battery-developed-in-australia-68702
>>
>>
>> On 10/03/2020, at 10:04 AM, Rick Patton via Personal_Submersibles <
>> personal_submersibles at psubs.org> wrote:
>>
>> Thanks Cliff for the data. I'll check out what you sent and also just
>> wanted some feedback from those on the site as to what they are using for
>> the type of battery's they have and how they like them which you have done.
>> I'll also reach out to the battery manufacturer that I pick to ask them
>> about the proper charging rates recommended for that particular battery. I
>> guess my main concern is that the charger that I pick knows when to shut
>> off and turn back on so I don't ruin the battery's.
>> I learned the hard way by buying a charger that didn't know to shut off
>> and I ruined the batteries on my sailboat.
>> Rick
>>
>>
>> On Mon, Mar 9, 2020 at 10:13 AM Cliff Redus via Personal_Submersibles <
>> personal_submersibles at psubs.org> wrote:
>>
>>> I have used Zivan EV battery chargers for 15 years on the R300. When the
>>> boat drive train included a jet ski motor with impeller, I used the Zivan
>>> NG3 model NG3-120-18 to charge the 120VDC nominal AGM main battery.  When I
>>> switch over to Minn Kota 101 trolling motors, the main battery bus voltage
>>> was reduced to 36VDC nominal and I switched to a Zivan NG3 model
>>> NG3-36-60.  In both cases, the battery charger was installed within the
>>> pressure hull so that I could easily recharge.  I have been very happy with
>>> these chargers and never had a failure.  See Zivan NG3 Battery Charger
>>> <http://www.zivanusa.com/NG3BatteryCharger.htm>
>>>
>>> Zivan NG3 Battery Charger
>>>
>>> Fireworks Splice HTML
>>> <http://www.zivanusa.com/NG3BatteryCharger.htm>
>>>  for more info.
>>>
>>> When you order these units, supplier will need to know the type (lead,
>>> AGM, gel) and nominal voltage of the battery you are charging to set
>>> specific parameters on the charger to match your battery bank.  On both
>>> chargers, I purchased the optional thermal sensor as these chargers charge
>>> at different rate depending on temperature.  See Zivan Charge Curves
>>> <http://www.zivanusa.com/ChargeCurve.htm>
>>>
>>> Zivan Charge Curves
>>>
>>> Fireworks Splice HTML
>>> <http://www.zivanusa.com/ChargeCurve.htm>
>>>  for the three charge phases.
>>>
>>> They are a bit pricey but can be found on Ebay often.
>>>
>>> If you are into PLCs, these units have an optional interface for
>>> monitoring the charge.  If you are not into PLCs, then you can just connect
>>> the charger to the battery bank and plug it in to an AC source and monitor
>>> the charge manually either through a remote display or the display on the
>>> unit itself.
>>>
>>> I am not arguing that this charger is better or worse than other heavy
>>> duty charger, it is just the one that I have the had the most experience
>>> with.
>>>
>>>
>>> Cliff
>>>
>>> On Sunday, March 8, 2020, 03:17:42 PM CDT, Rick Patton via
>>> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>>
>>>
>>> Hey guys, any other feed back on what you use for a battery charger for
>>> 12 or 36 volts, Sean, whats your input?
>>> Rick
>>>
>>> On Sun, Mar 8, 2020 at 9:48 AM Brian Cox via Personal_Submersibles <
>>> personal_submersibles at psubs.org> wrote:
>>>
>>> Alan,           According to the specs an my batteries is shows a low
>>> voltage of 5 volts .     But better battery life if discharged less than 50
>>> %
>>>
>>>
>>> https://resources.fullriverbattery.com/fullriver-battery/external-media/spec-sheets/DC220-6.pdf
>>>
>>>
>>>
>>>
>>> Brian
>>>
>>>
>>>
>>> --- personal_submersibles at psubs.org wrote:
>>>
>>> From: Alan via Personal_Submersibles <personal_submersibles at psubs.org>
>>> To: Personal Submersibles General Discussion <
>>> personal_submersibles at psubs.org>
>>> Subject: Re: [PSUBS-MAILIST] (no subject)
>>> Date: Sun, 8 Mar 2020 21:29:48 +1300
>>>
>>> Brian,
>>> It is recommended not to take lead acid batteries below 50% charge,  or
>>> 12.2V.
>>> So 48.8V.
>>> However when you have a heavy load on them they indicate a lower voltage
>>> than
>>> what they will be if you stop the motor & let them recover.
>>> Alan
>>>
>>>
>>>
>>>
>>> On 8/03/2020, at 7:04 PM, Brian Cox via Personal_Submersibles <
>>> personal_submersibles at psubs.org> wrote:
>>>
>>> David,   yes I'm running off my batteries, they are AGM, I have eight
>>> 240  ah  batteries.  I'm not sure how low I can go with the voltage,   I
>>> believe the storage indicator has a low limit where it would read zero, but
>>> I'm pretty sure the motors will run on 36 volts,  there is most likely a
>>> recommended low voltage for the 12 volt batteries.   I ran them for 6 hours
>>> and the storage indicator was telling me 40% full.  Voltage was 44.3
>>>
>>> Rick,  this is the battery charger I have:
>>> https://www.batterypete.com/chargers/golf-carts/delta-q-quiq-48-volt-18-amp-912-4800/?gclid=Cj0KCQiAqY3zBRDQARIsAJeCVxP7pOTpKjANY_Z4leDJMXsag_kgsFsDIKImLms-Qd7CIh43hEoq7_oaAruDEALw_wcB
>>>
>>> Brian
>>>
>>>
>>>
>>>
>>>
>>> --- personal_submersibles at psubs.org wrote:
>>>
>>> From: David Colombo via Personal_Submersibles <
>>> personal_submersibles at psubs.org>
>>> To: Personal Submersibles General Discussion <
>>> personal_submersibles at psubs.org>
>>> Subject: Re: [PSUBS-MAILIST] (no subject)
>>> Date: Sat, 7 Mar 2020 21:02:11 -0800
>>>
>>> Brian, are you running them from your actual batteries? Are they deep
>>> cycle lead AGM, or LIPO4? What's the cut off voltage?
>>> David
>>>
>>> On Sat, Mar 7, 2020, 7:58 PM Brian Cox via Personal_Submersibles <
>>> personal_submersibles at psubs.org> wrote:
>>>
>>> It's been 4 hours now and my voltage is at 46.44 volts
>>>
>>> Brian
>>>
>>>
>>>
>>> --- personal_submersibles at psubs.org wrote:
>>>
>>> From: Alan via Personal_Submersibles <personal_submersibles at psubs.org>
>>> To: Personal Submersibles General Discussion <
>>> personal_submersibles at psubs.org>
>>> Subject: Re: [PSUBS-MAILIST] (no subject)
>>> Date: Sun, 8 Mar 2020 15:48:43 +1300
>>>
>>> Hi Brian,
>>> 3hp is 2,200W, so 500W with no load seems excessively high.
>>> Just measured mine & it's .9Amps (900mAh) for a 1500W compensated motor
>>> running in a 5cst silicone oil. Running off 48V also. So under 49W.
>>> I think you have a large prop on your motors. I just saw your gearing
>>> ratio, but the
>>> loss shouldn't be that much.
>>> I would test them individually in case one is at fault.
>>> Cheers Alan
>>>
>>> On 8/03/2020, at 2:54 PM, Brian Cox via Personal_Submersibles <
>>> personal_submersibles at psubs.org> wrote:
>>>
>>> Alan,             They are 3 hp golf cart motors, true there is no load
>>> but If I kept the same amp draw while actually at sea then it seems it
>>> would be equivalent.     Under actual conditions it would probably be going
>>> very slowly while drawing 21 amps ( 10.5 amps per motor ) .
>>>
>>> Brian
>>>
>>>
>>>
>>> --- personal_submersibles at psubs.org wrote:
>>>
>>> From: Alan via Personal_Submersibles <personal_submersibles at psubs.org>
>>> To: Personal Submersibles General Discussion <
>>> personal_submersibles at psubs.org>
>>> Subject: Re: [PSUBS-MAILIST] (no subject)
>>> Date: Sun, 8 Mar 2020 14:21:54 +1300
>>>
>>> Brian,
>>> I take it that there is no load on the motor!
>>> That seems a high power consumption, 500 Watts per motor.
>>> Have you got the specs for those motors? Have you checked them
>>> individually?
>>> Alan
>>>
>>> On 8/03/2020, at 1:26 PM, Brian Cox via Personal_Submersibles <
>>> personal_submersibles at psubs.org> wrote:
>>>
>>> There are some times when 110 vac could be needed, like computer stuff.
>>>  Just a thought, we can have an open mind on the subject !
>>>
>>>
>>>   Right now I'm running my motors to see how long they'll go.  It's a
>>> kind of cool rainy day so the temperature is close to what the ocean would
>>> be .   I've got the oil expansion tube going into a bucket so I can get an
>>> idea how large of a reservoir I will need to take care of the expansion.  I
>>> think I'm going to opt for just a reservoir on the motor side and then I'm
>>> running a hose up high and then back down to take care of the compression
>>> up the tube for when I submerge.  Since most of the compression of air will
>>> occur in the first 30' the water should never get high enough ( in the
>>> tube) to go over the hump and get into the motor compartment.   So the
>>> whole system will be open .    I'm also monitoring Voltage ,  Amp draw, and
>>> ,  Watts     48 volts       21 amps       1030  watts    - two motors
>>> running  .
>>>
>>>
>>>
>>> Brian
>>>
>>>
>>>
>>> --- personal_submersibles at psubs.org wrote:
>>>
>>> From: hank pronk via Personal_Submersibles <
>>> personal_submersibles at psubs.org>
>>> To: Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org
>>> >
>>> Subject: Re: [PSUBS-MAILIST] (no subject)
>>> Date: Sun, 8 Mar 2020 00:06:47 +0000 (UTC)
>>>
>>> Why complicate a simple solution?  this works great!  Bad Brian!
>>>
>>> Hank
>>>
>>> On Saturday, March 7, 2020, 4:59:49 PM MST, Brian Cox via
>>> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>>
>>>
>>> There are a lot of 110AC led's out there , it would be a simple matter
>>> to run a DC inverter to make 110ac voltage ,  I wonder if there would be
>>> any advantage to that,  there might be some better quality led's that are
>>> made for AC voltage, Any thoughts on that?
>>>
>>> Brian
>>>
>>>
>>>
>>> --- personal_submersibles at psubs.org wrote:
>>>
>>> From: hank pronk via Personal_Submersibles <
>>> personal_submersibles at psubs.org>
>>> To: Personal Submersibles General Discussion <
>>> personal_submersibles at psubs.org>
>>> Subject: [PSUBS-MAILIST] (no subject)
>>> Date: Sat, 7 Mar 2020 16:30:26 +0000 (UTC)
>>>
>>>                             15:13 Now playing Watch later Watch later
>>> Add to queue Add to queue
>>> <https://www.youtube.com/watch?v=dHDUilUO6P8>
>>>
>>> How To Make An Underwater Submarine LED Light Bar
>>>
>>> In this video I am converting an everyday LED light bar into the deep
>>> diving, oil filled, underwater light bar t...
>>> <https://www.youtube.com/watch?v=dHDUilUO6P8>
>>>
>>>
>>>
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