If the battery is sufficiently sealed so that water does not get inside, and it has a bms / fuse - then it should hopefully not "run away". Salt water is much more conductive than fresh water. Not sure how many amps could possibly pass between terminals - I wouldn't think a LOT - as the resistance is still pretty high. And in the event of a dead short - many battery sets should have a fuse that would quickly blow. The BMS should detect a high discharge, and also attempt to shut down the battery.
Of course, this depends on who put the battery together, whether it includes a fuse, etc. If you're putting your own system together - it's up to you to put a fuse in directly at the battery.
On Monday, February 17, 2020, 08:45:23 PM CST, mosslandingcreatures <mosslandingcreatures@gmail.com> wrote:
That's perhaps the conundrum. Coming ashore sooner or later (cruisers) you're going to broach your dingy and water will most certainly invade the typical vented battery box. No prob with AGM because I've dunked them many times without consequence. A lithium battery with BMS I've been told will at least ruin the battery or worse start a runaway when immersed in saltwater? I wish I knew of any electric skiff cruisers that knew the answer using lithium. I am very anti ICE but maybe for my own safety I'll have to go back to it. Why do people vent battery boxes if the battery inside will not emit explosive gases? (Lithium).
On Mon, Feb 17, 2020 at 5:45 PM THOMAS VANDERMEULEN <tvinypsi@gmail.com> wrote:
Excellent point, Phil, and not to mention that ABYC Standards call for ventilation of the battery box or compartment to prevent the concentration of any escaping toxic or flammable gasses.
[-tv]
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