[gthang]

Lithium batteries for automotive use are Lithium IRon phosphate type and not the usual Lithium Ion used in cellphones and such. They are not dangerous at high temp and can withstand automotive charging cycle. So those with those worries can chill.

This is all fine and dandy, just hope we don't run out of Lithium before we run out of oil. That would be awkward.

Cheers.

[aim120]

Originally Posted by gthang

Lithium batteries for automotive use are Lithium IRon phosphate type and not the usual Lithium Ion used in cellphones and such. They are not dangerous at high temp and can withstand automotive charging cycle. So those with those worries can chill.

This is all fine and dandy, just hope we don't run out of Lithium before we run out of oil. That would be awkward.

Cheers.

Lithium iron phospate (LiFePO4) are only used mainly in China and in buses, even Tesla doesn't use them.
For cars and two wheeler's the problem is the limited space available and for that reason alone you will not find car companies using it (some did but all are moving towards lithium Ion based).

The reason they don't use LiFePO4 is because it has a 3.3v nominal voltage and the energy density is also lower. They also need really sophisticated BMS, since the discharge curve is flat, meaning the voltage drops sharply when its about to be dead, so you can't do BMS with just measuring the voltage, you will now need to know the input current and the output current per cell with respect to age of the battery.

The Lithium Ion and other derivatives have a max charge voltage of 4.2v which is much higher then LiFePO4 3.6v max charge voltage and that by itself means you need fewer batteries to get the desired battery pack voltage, thus you save on space and weight. Apart from that practically the LiFePO4 size per size also has less AH rating then Li-on.

The same reason why Lithium Titanate oxide battery, whose voltage is even lower at 2.8v is not used in upcoming cars, due to space and weight despite it being much safer and having a cycle life outlasting the cars life.

[gthang]

Originally Posted by aim120

Lithium iron phospate (LiFePO4) are only used mainly in China and in buses, even Tesla doesn't use them.
For cars and two wheeler's the problem is the limited space available and for that reason alone you will not find car companies using it (some did but all are moving towards lithium Ion based).

Are you talking about EVs or replacement for lead acid battery in regular IC vehicles?

I was posting under the impression that Maruti was rumored to be replacing lead in regular cars.

Dunno nothing about EV battery tech. Don't care much for toys that run on AAs.

Cheers.

[GTO]

Sorry about the wrong figures in the news item, guys. As we all know, conventional batteries can be had for 4k - 6k. The numbers were inadvertently taken from the source as is.

Deleting that part.

[jinojohnt]

Originally Posted by aim120

While it is unlikely to be sold in India. The perfect lithium based battery for hot temperature is Lithium Titanium Oxide

It's just a matter of time before it becomes mainstream. Daewoo Cielo was launched 25 years back with the first (expensive, new tech) MPFI engine, but now MPFI technology is too aam aadmi.