Re: [electricboats] Do your LiFePO4 batteries ever get too warm?

These lifepo4 battery configurations need complete waterproof for marine application. 

On Feb 16, 2020, at 2:47 PM, mosslandingcreatures <mosslandingcreatures@gmail.com> wrote:

I saw a video where someone was separating the laminations and removing the lithium strip. When put in water it reacted most demonstrably. Because of this I tried to specify IP 67 or IP 68 batteries with BMS. Not apparently in 100 AH group 31 to be had. It scares me to be running expensive lithium batteries whose BMS or worse can be destroyed in a skiff overturn coming ashore. It's only a matter of time before a cruiser wets his batteries trying to come ashore in difficult but necessary circumstances.

On Sun, Feb 16, 2020 at 2:33 PM THOMAS VANDERMEULEN <tvinypsi@gmail.com> wrote:

It may be useful to everyone to know if you've ever experienced your LiFePO4 batteries becoming too warm while charging or while they were under load.

Frankly, I've begun to wonder if the demands of any kind of boating activity on a battery bank would ever push or pull enough amps to raise the temperature of the typical LiFePO4 pack into a hazardous range.
However, if you've had this experience, I would ask that you reply to this message and please describe your setup and conditions for us.

One might say, for instance, you use 100Ah prismatic battery cells in a 16S1P configuration, bound with end-plates and held in a heavy plastic box with lid, and you were {charging|discharging} at a rate of approximately {__ Amps}.  Batteries were measured with a {________} at a temperature of {_______}.

This won't be a statistically a meaningful survey, of course, but if anyone *has* had an overheating experience, it could make for safer boating for everyone if the rest of us were to know the particulars.

Thanks so much!

[-tv]
Tom VanderMeulen
"Grace O'Malley"
Cape Dory 27, #257
Monroe, MI