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Open Roads Forum  >  Tech Issues

 > My AGM to Lithium conversion

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pianotuna

Regina, SK, Canada

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Posted: 05/01/22 07:11pm Link  |  Quote  |  Print  |  Notify Moderator

covered wagon wrote:

Not talking about the initial cost, I'm talking about the danger involved with use and the eventual problems with recycling.


Up until recently I would have agreed with you. However, that is no longer the case:

"The lithium solution was heated to 70–80?, and Na2CO3 solution was added to the reaction dropwise to produce sediments of Li. This precipitate was vacuum filtered, washed with high purity water several times, and dried under vacuum to obtain high purity battery grade Li2CO3."

From: https://www.degruyter.com/document/doi/10.1515/ntrev-2020-0119/html?lang=en


Regards, Don
My ride is a 28 foot Class C, 256 watts solar, 556 amp-hours of Telcom jars, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.

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NV.

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Posted: 05/01/22 07:47pm Link  |  Quote  |  Print  |  Notify Moderator

covered wagon wrote:

Should be required to have a sign on the side of the RV warning about Lithium batteries on board. Life has it's benefits and everything has a trade off. To me sometimes the trade off is too costly. Not talking about the initial cost, I'm talking about the danger involved with use and the eventual problems with recycling. I believe in keeping it simple, have a little more physical labor in life it's better for you.


Present day reality is that LiFePO4 (or LFP) chemistry is in fact very safe, and with a sealed casing, is not even considered a hazardous material….However, your concerns are duly noted [emoticon], just be sure not to short out the - & + terminals..

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covered wagon

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Posted: 05/03/22 06:06am Link  |  Quote  |  Print  |  Notify Moderator

Thank you all for the update and link about latest tech on lithium batteries. I will do some reading on it for sure especially since I am skeptical about their safety.

otrfun

On The Road

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Posted: 05/03/22 10:57am Link  |  Quote  |  Print  |  Notify Moderator

covered wagon wrote:

Should be required to have a sign on the side of the RV warning about Lithium batteries on board. Life has it's benefits and everything has a trade off. To me sometimes the trade off is too costly. Not talking about the initial cost, I'm talking about the danger involved with use and the eventual problems with recycling. I believe in keeping it simple, have a little more physical labor in life it's better for you.
Lead acid batteries off-gas highly toxic, extremely flammable hydrogen sulfide gas. The sulfuric acid inside a lead-cell battery (if splashed) can cause serious eye injuries. Lead used in lead-cell batteries is a known carcinogen that causes a number of very serious health issues. Put in this context, got to wonder why there isn't a warning sticker on the side of every internal-combustion vehicle on the road.

As for lifepo4's, they have zero off-gassing issues. To my knowledge (unlike lead-cell and some lithium-ion batteries) none of the materials used in lifepo4 cells are toxic. Also, all the *external* thermal runaway issues that exist with standard lithium-ion cells (i.e., fire/flames exiting the battery case) do not exist with lifepo4. A lifepo4 battery has superior chemical and thermal stability vs. a run-of-the-mill lithium-ion battery. Bottom line, lifepo4 can experience some small amounts of *internal* thermal runaway, but it won't exit the case.

Yes, there is a YT video showing a lifepo4 experiencing arcs and flames when pierced with a metal spear. Any battery will experience this if internally short circuited using conductive metal. The same effect, externally generated, can be experienced by simply shorting the neg and pos terminals of any battery.

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