Lithium to replace lead in cars?

[ebent]

What is required to replace the lead batteries to start our motors with lithium? Will the alternators work? What else?

Thanks

 

[Hillhater]

you will need an absolutely bulletproof BMS to protect the cells from over/under charge.
Manufacturers are already producing these Li Auto batteries with BMS included ......at a cost !
http://www.greencarcongress.com/2011/03/a123-20110331.html#more

Nanophosphate Engine Start Battery (12V):

 

[olaf-lampe]

I started a 2 liter diesel engine once with only 4 headway 10Ah cells. Worked surprisingly well, but I would see it as an emergency solution.
I also used 4 26650 sized ( not a123) cells paralleled with the lead battery to make starting easier during the cold period. Never balanced them. Worked fine, but two cells had a lower voltage after 6 month.
Probably a pack of Konion/ Li-manganese cells would work fine without BMS, but the voltage doesn't match well with a common 12V car system. ( Although all components in a car are supposed to handle 30v for short peaks )
Thundersky offers 12V LiFePO batteries in different sizes, but I have no experience with them.

-Olaf