Re: [Electric Boats] Feasible to change to 6v golf cart batteries?

James is right, in a sense.
He is also technically astute, very much.

Nevertheless, huge numbers of lion and forklift batteries around 2-3-4-6
volts are used every day, with no problems, in general.

What james says, basically, is that as battery banks get bigger, they
are more dangerous.
Agree 100% - 200% !!!

Big Batteries, or any major energy source, is always going to be
potentially dangerous.
The good part about lion batteries/packs is that a 0.1 cent electronic
fuse, will stop the problem, almost always.

One of the dangers of a really good/powerful lion battery packs is that
they look harmless.
I used to deal with a 70 kW / 380V from a generator at our facility for
CNC tools.
I was very, very careful with the leads, and all personnel were trained
to treat them as highly dangerous.
Soon, people will learn to respect them.

A small tsla-type battery pack is just as dangerous, gives no warning,
makes no noise.

The battery is NOT dangerous on its own.
Just like guns, jet fighters, are not dangerous.
I used to work on Mig 21bis as a mechanic with major power used to start
the engines, from the ground side auxiliary power unit.



On 06/06/2017 20:23, James Lambden james@electroprop.com [electricboats]
wrote:
> I do not recommend 6 volt batteries. There are twice as many
> batteries in the system, so twice as many interconnections, and much
> more to go wrong with a system like this.
>
> Batteries in parallel have issues too. Hardwiring batteries in
> parallel is problematic. when one battery fails, the other will be
> ruined by the failure. In worst case scenarios, the failed battery
> emits hydrogen gas and the smallest spark can set off a catastrophic
> failure.
>
> Please be careful and monitor every battery on board your boat for
> temperature and voltage and keep your electric boat safe for you and
> your passengers.
>
> The technology exists to have a safe battery bank. Pure Lead 12 volt
> Batteries in series with monitoring. Its really simple, and safe.
>
>
> James
>

--
-hanermo (cnc designs)



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