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 > Renogy self heating LiFeO4 battery

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noteven

Turtle Island

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Posted: 09/22/21 07:35am Link  |  Quote  |  Print  |  Notify Moderator

I see Renogy has a self heating lithium battery available. The BMS turns on pre heating prior to charging below minimum battery temperarture.

Link

The discharging low temperature limit of -20C / -4F may be an issue in my current camper project when the camper is sitting frozen and you want to start up an electric reliant heating system to put the camper back in service.

* This post was edited 09/22/21 07:46am by noteven *

Lwiddis

Near DVNP, California

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Posted: 09/22/21 07:52am Link  |  Quote  |  Print  |  Notify Moderator

A useful feature!


Winnebago 2101DS TT & 2020 Chevy Silverado 1500 LTZ Z71, 300 watt solar-Lossigy 200 AMP Lithium battery. TALL flag pole. Prefer boondocking, USFS, COE, BLM, NPS, TVA, state camps. Bicyclist 14 yr. Army -11B40 then 11A - (MOS 1542 & 1560) IOBC & IOAC grad


FWC

The Wilderness

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Posted: 09/22/21 08:07am Link  |  Quote  |  Print  |  Notify Moderator

The discharge low temperature limit is typically not a hard BMS limit (like the low temperature charge limit) and there is nothing that will physically damage the cells if you discharge below -20C. It is just that the cell manufacturers don't test below -20C because few customers care about that. Some do and actually show pretty good performance down to about -45C. They will loose capacity, but not nearly as much a lead acid batteries.

noteven

Turtle Island

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Posted: 09/22/21 09:34am Link  |  Quote  |  Print  |  Notify Moderator

FWC wrote:

The discharge low temperature limit is typically not a hard BMS limit (like the low temperature charge limit) and there is nothing that will physically damage the cells if you discharge below -20C. It is just that the cell manufacturers don't test below -20C because few customers care about that. Some do and actually show pretty good performance down to about -45C. They will loose capacity, but not nearly as much a lead acid batteries.


Thanks FWC that's good info

pianotuna

Regina, SK, Canada

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Posted: 09/22/21 04:24pm Link  |  Quote  |  Print  |  Notify Moderator

noteven,

Or you could simply use SiO2 batteries that are not fussy. They can be discharged farther down than Li and can be charged at -40.

They are cheaper than Li unless you are "rolling your own Li".


Regards, Don
My ride is a 28 foot Class C, 256 watts solar, soon to have SiO2 batteries, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.

noteven

Turtle Island

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Posted: 09/22/21 05:07pm Link  |  Quote  |  Print  |  Notify Moderator

pianotuna wrote:

noteven,

Or you could simply use SiO2 batteries that are not fussy. They can be discharged farther down than Li and can be charged at -40.

They are cheaper than Li unless you are "rolling your own Li".


Ya I see Azimuth has them back in stock. They seem like a more dummy proof solution to me.

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