[PSUBS-MAILIST] battery pod

Tue Mar 30 19:16:33 EDT 2021

Alan
I just posted 4 photos on this format so you'll probably see them before
you see this. I'll post them on facebook as well like you said, and no I am
not stuck with the wet cell batteries and was thinking of going with them
to lessen the spill and offgas effects as well.

Rick

On Tue, Mar 30, 2021 at 1:08 PM Alan via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Rick,
> still not understanding it properly. A heap of photos on FB would be
> helpful.
> Are you stuck with those wet cel batteries?
> Other lead acids like AGM can be mounted on an angle.
> Alan
>
> On 31/03/2021, at 9:42 AM, Rick Patton via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> The drawing was not to scale. I have 4 copper rods that are 1/2 and two
> that are I think 1/4". the 4 are 2 for the 12V and 2 for the 36V and the 2
> smaller ones are positive and negative for the water sensor. I am using 2
> OTT welding cables with lugs on the ends for all the copper lugs that come
> through. I cut them as short as I can so that I can have two nuts on each.
> I'll take a picture and see if it's good enough to show you what I have.
> Thanks everyone for your help.
>
> Rick
>
> On Tue, Mar 30, 2021 at 9:58 AM Cliff Redus via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>> What about securing the battery lugs to the copper allthreads with jam
>> hex nuts instead of regular hex nuts and then trim the all treads off a bit
>> with an angle grinder.  This should save about the thickness of one the hex
>> nuts.  From your drawing, I don't know how much of clearance issue you
>> have.  If it is small on the order of 1/4" or so, this might work.
>>
>> Cliff
>>
>> On Tuesday, March 30, 2021, 02:36:08 PM CDT, Rick Patton via
>> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>
>>
>> Here's a drawing as I don't think I could get a real photo that was
>> better. The only option that I can think of if it would work, short of
>> finding a battery that was say a 1/2" shorter in height, would be to not
>> use the aluminum trays and if the battery's are narrow enough to fit
>> between the horizontal legs of the SS angle, I could just have them sit on
>> the inner wall of the pod which might solve my problem but then I have the
>> problem of friction sliding them in but more of a problem pulling them back
>> out when needed.
>> I guess I could cut a piece of aluminum plate the width of the batteries
>> that is the full length of the pod and then maybe install a set of small
>> rollers on the far end so when I reach in and lift the front end, which
>> would be very hard due to the weight of the 4 batteries, and start pulling
>> them all out, the back rollers would lessen the friction? I was planning on
>> going with the AGM batteries anyway so maybe I can find one that is a
>> little shorter so I can use my battery tray? I'll start calling some
>> battery companies to see if I can get one that is a little shorter.
>> Rick
>>
>> On Tue, Mar 30, 2021 at 7:49 AM Cliff Redus via Personal_Submersibles <
>> personal_submersibles at psubs.org> wrote:
>>
>> Hard to visualize.  An end view of pods showing the interference issue
>> would help.
>>
>> Cliff
>>
>> On Monday, March 29, 2021, 11:20:25 PM CDT, Rick Patton via
>> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>
>>
>> Well I just got blindsided by my first, what I would call major problem,
>> since I started this project which I guess is pretty good but it might be a
>> major one. On any project, you tend to look forward the best you can when
>> you fabricate something to make sure you are not painting yourself into a
>> corner but this one may have got me I think.
>>
>> My battery pod design is a little different than what's on the plans. I
>> attach the end caps a little differently but I also take the power into the
>> sub a little differently as well. I wanted to be able to remove the
>> batteries when needed without a lot of trouble though the end caps will
>> usually always stay on. I built an aluminum tray for each side that all 4
>> batteries fit into end to end and that tray slides along two pieces of SS
>> angle welded into the inside. One leg goes up and the other leg points
>> inward at each other.
>>
>> After building the aluminum trays using 1/4" flat bar, I snuggled the SS
>> angle to both sides of the tray adding a little slop to it so they wouldn't
>> be too snug and bind then put them inside the pipe and went down until the
>> SS angles touched the inside of the pipe and tack welded the SS angles in
>> place plumb and true. Before doing all this, I made a plywood template of
>> it to confirm that I would have the clearance I needed based on using the
>> 12 volt wet cell battery the plans call for.
>>
>> Even with the thickness of the SS tracks and aluminum trays, I had a
>> comfortable clearance for passing my sealing ring. Well,,,I found out that
>> with the batteries in the tray, they will not slide under/past the copper
>> all thread that comes in at the 32 degree angle from the hull and I cut
>> those about as short as I could to be able to get the 2 nuts on them with a
>> lug. From what little I understand about wet cell batteries, I guess they
>> come in different classes based on certain things so I don't think I can
>> just go get ones that are a little shorter. I am all ears guys! I have had
>> usually non P subbers ask me why I didn't use new state of the art lithium
>> batteries or golf cart batteries but I am limited on space and
>> dimensions and also a lot of thought went into trimming the boat out using
>> that particular battery.
>>
>> Rick
>>
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