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Next: Boat Building: lining water tanks
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External
Since: Nov 12, 2007
Posts: 6
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(Msg. 1) Posted: Fri Feb 15, 2008 2:38 pm
Post subject: Battery Box
Archived from groups: rec>boats>building (more info?)
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I've read the specs. for Coast Guard requirements and still have a
question with regards to batteries.
The starting battery is in the engine compartment.
The engine is a gasoline engine.
I built a tray that the battery has to be lifted up to set it in. Has
a lip all the way around.
The battery has only 1" of clearance on top of the battery. The
battery slides under the berth deck into this tray. It's really hard
to lift this battery up and out of the tray. I have a clamp that holds
the battery into the tray.
Question is, does the battery need to be in a box or is it OK to sit
it on a tray?
I worry about the side of the battery cracking and leaking the acid.
Dan |
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External
Since: Sep 07, 2007
Posts: 511
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(Msg. 2) Posted: Fri Feb 15, 2008 2:39 pm
Post subject: Re: Battery Box [Login to view extended thread Info.]
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External
Since: Feb 15, 2008
Posts: 1
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(Msg. 3) Posted: Fri Feb 15, 2008 2:39 pm
Post subject: Re: Battery Box [Login to view extended thread Info.]
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salty.DeleteThis@dog.com wrote:
> On Fri, 15 Feb 2008 14:38:59 GMT, Dan@ (Dan ) wrote:
>
>
>>I've read the specs. for Coast Guard requirements and still have a
>>question with regards to batteries.
>>The starting battery is in the engine compartment.
>>The engine is a gasoline engine.
>>I built a tray that the battery has to be lifted up to set it in. Has
>>a lip all the way around.
>>The battery has only 1" of clearance on top of the battery. The
>>battery slides under the berth deck into this tray. It's really hard
>>to lift this battery up and out of the tray. I have a clamp that holds
>>the battery into the tray.
>>Question is, does the battery need to be in a box or is it OK to sit
>>it on a tray?
>>I worry about the side of the battery cracking and leaking the acid.
>>Dan
>
>
> AFAIK, I has to be in a box. It would probably be a good idea even if
> it were not required, especially for flooded batteries. Boats
> sometimes capsize or get tossed about violently. It also protects the
> terminals in the event something else gets loose and ends up striking
> the battery. I'm not really too keen on a flooded battery being in a
> confined space with a gasoline engiine, but that's just me.
>
>
The battery will emit Hydrogen gas when under load.
The box should be gas tight and vented overboard where a stray spark
can't ignite the H2.
It should also be about to hold spilled or leaked acid without leaking
acid into the boat.
Ok? >> Stay informed about: Battery Box |
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External
Since: Sep 07, 2007
Posts: 511
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(Msg. 4) Posted: Fri Feb 15, 2008 2:50 pm
Post subject: Re: Battery Box [Login to view extended thread Info.]
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External
Since: Feb 02, 2005
Posts: 922
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(Msg. 5) Posted: Sun Feb 17, 2008 11:32 am
Post subject: Re: Battery Box [Login to view extended thread Info.]
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On Fri, 15 Feb 2008 10:12:17 -0500, salty RemoveThis @dog.com wrote:
>I'm not really too keen on a flooded battery being in a
>confined space with a gasoline engiine, but that's just me.
It's done all the time.
The top of the battery does not need to be covered to meet ABYC specs
but an insulating boot is required on the terminals. A battery tray
with secure hold downs should be sufficient. >> Stay informed about: Battery Box |
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External
Since: Feb 02, 2005
Posts: 922
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(Msg. 6) Posted: Sun Feb 17, 2008 11:34 am
Post subject: Re: Battery Box [Login to view extended thread Info.]
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On Fri, 15 Feb 2008 13:29:43 -0800, cavalamb himself
<cavelamb RemoveThis @Xearthlink.net> wrote:
>The box should be gas tight and vented overboard where a stray spark
>can't ignite the H2.
I have never seen that done. It is not required by ABYC specs or for
USCG inspected vessels. >> Stay informed about: Battery Box |
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External
Since: Sep 07, 2007
Posts: 511
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(Msg. 7) Posted: Sun Feb 17, 2008 11:56 am
Post subject: Re: Battery Box [Login to view extended thread Info.]
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Since: Feb 02, 2005
Posts: 922
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(Msg. 8) Posted: Sun Feb 17, 2008 9:42 pm
Post subject: Re: Battery Box [Login to view extended thread Info.]
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On Sun, 17 Feb 2008 11:56:52 -0500, salty DeleteThis @dog.com wrote:
>If you ever had flooded batteries in a boat that
>got knocked over, you would likely have the same opinion that I have.
Serious sailboat racers and offshore cruisers, yes, AGMs make a lot of
sense. Power boats and casual day sailors, I'm not so sure. If my
trawler or runabout get knocked over I've got a lot more to be
concerned about than a little acid in the bilge. I once got acid in
the bilge of one of my old sailboats (long story) and nothing was
damaged except a transducer cable. >> Stay informed about: Battery Box |
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External
Since: Sep 07, 2007
Posts: 511
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(Msg. 9) Posted: Mon Feb 18, 2008 7:29 am
Post subject: Re: Battery Box [Login to view extended thread Info.]
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External
Since: Jul 11, 2007
Posts: 112
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(Msg. 10) Posted: Wed Feb 20, 2008 3:11 pm
Post subject: Re: Battery Box [Login to view extended thread Info.]
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On Fri, 15 Feb 2008 13:29:43 -0800, cavalamb himself
<cavelamb.TakeThisOut@Xearthlink.net> wrote:
>The battery will emit Hydrogen gas when under load.
>
>The box should be gas tight and vented overboard where a stray spark
>can't ignite the H2.
>
>It should also be about to hold spilled or leaked acid without leaking
>acid into the boat.
About ninty years ago, a US sub had a H2 explosion at the dock.
Eventually the Navy installed proper ventelation. Don't even ask about
the gasoline subs. No venting fumes over the side while submerged..
Casady >> Stay informed about: Battery Box |
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External
Since: Nov 12, 2007
Posts: 6
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(Msg. 11) Posted: Sat Feb 23, 2008 1:00 pm
Post subject: Re: Battery Box [Login to view extended thread Info.]
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I guess I should have stated that this is a sailboat. It's a Catalina
c25. Where the battery is located, I don't think it will fit in a
battery box. There is only about 1/2" clearance over the tops of the
terminals. I have to connect the pos. terminal, then slide the battery
half way under the deck, then connect the negative terminal then slide
the battery into the tray and clamp it down. I would really have to
work at contacting the positive terminal with anything. Its dam near
impossible to see the terminal without lying down and performing some
contortionist maneuvers. >> Stay informed about: Battery Box |
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External
Since: Apr 18, 2007
Posts: 9
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(Msg. 12) Posted: Tue Feb 26, 2008 8:53 pm
Post subject: Re: Battery Box [Login to view extended thread Info.]
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On Feb 15, 1:29 pm, cavalamb himself <cavel....TakeThisOut@Xearthlink.net> wrote:
> It should also be about to hold spilled or leaked acid without leaking
> acid into the boat.
Id add that battry acid in the bilge is not a real problem
unless............ there is also salt water. I belive that electrolite
and sea water do some black magic and create some type of deadly
gas.... ANy chemist out there?
Bob >> Stay informed about: Battery Box |
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Since: May 15, 2007
Posts: 8
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(Msg. 13) Posted: Wed Feb 27, 2008 7:14 am
Post subject: Re: Battery Box [Login to view extended thread Info.]
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Bob brought forth on stone tablets:
> On Feb 15, 1:29 pm, cavalamb himself <cavel... DeleteThis @Xearthlink.net> wrote:
>
>
>>It should also be about to hold spilled or leaked acid without leaking
>>acid into the boat.
>
>
> Id add that battry acid in the bilge is not a real problem
> unless............ there is also salt water. I belive that electrolite
> and sea water do some black magic and create some type of deadly
> gas.... ANy chemist out there?
>
> Bob
Sulphuric acid plus chloride salts produces chlorine gas
bob
s/v Eolian
Seattle >> Stay informed about: Battery Box |
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Since: Jul 11, 2007
Posts: 112
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(Msg. 14) Posted: Wed Feb 27, 2008 9:01 pm
Post subject: Re: Battery Box [Login to view extended thread Info.]
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On Tue, 26 Feb 2008 20:53:45 -0800 (PST), Bob <freya2go.DeleteThis@yahoo.com>
wrote:
>I belive that electrolite
>and sea water do some black magic and create some type of deadly
>gas.... ANy chemist out there?
Chemist? No, not really but I did get A 's in chemistry 101,102
This is a legend originating in submarines.[ Battery acid has a
concentration of one third H2SO4.] What does happen when a bunch of
sea water ges into a sub battery is lots of electricity making
chlorine gas by the usual electrolysis.Shorting any lead battery with
sea water will liberate chlorine
Casady >> Stay informed about: Battery Box |
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