if i put 2 LFP battery 12.8v 60 amp in series and the starting current for the truck reach 600 Amp what happens to the lithium battery?
asked
Lithium battery 12.8v 60 Amp
More specific details about the battery is needed to determine its maximum surge capacity and continuous delivery rating. However since this battery system falls well short of 600A I do however expect a much shortened battery life, high risk of overheating and possibly fire. Best to check with a professional battery supplier if they have any experience as this is a solar forum. Typically you also still see LA used for starting generators next to a Lithium installation.
In fact, the older VICTRON pre-smart battery datasheet lists 600A 10 second discharge current for the 60ah batteries. However they also make it very clear you need to be using a BMS if you run them in series or parallel in case of cell over or under voltage, so be warned.
I’m not 100% sure the newer smart batteries have the same specs.
The current datasheet no longer has the pulse current rating. I think it may be Victron's way of saying its at your own risk.
I used to work in Winston factory for 4 years, Victron is using Winston cells, the 12V battery is not designed to be used in P or S. So your intention of using 2 12V batteries in P is not good. Plus 600Ah big current, serious damage for batteries. Please do not try so. Better consider 8×60Ah cells in S than 2 12V60Ah.
@Suhaybk, it's not recommended to use LiFePO4 batteries as starting batteries. There are multiple reasons for this; the first, as addressed in previous answers, is simply that most reputable LFP drop-ins have a BMS that will shut down the battery when subjected to a load so significantly exceeding their peak rating. Another reason to not use an LFP as a starting battery is that the temperature extremes generally to be found in an underhood mounting configuration will dramatically shorted the lifespan of your LFP battery - if not in fact cause the BMS to shut down charge/discharge of the battery as well. And a final excellent reason to not use an LFP for a starting battery is that the start battery is typically charged directly by the alternator, and it is NOT safe to charge an LFP directly from your alternator unless you have a "smart" alternator or an external regulator that is specifically designed with an LFP profile.
Currently, AGM batteries are still the best cost-effective option for starting batteries if you want the PCA ability of an FLA battery with an extended reserve time; if cost isn't a particular factor, you can of course go to the carbon foam batteries like the Firefly Oasis for all the benefits of an FLA/AGM with a good helping of the discharge capabilities of an LFP.
