Another reference to LiFePO4 (A123) cells used in 2014 packs

[dangerHV]

Found a recent article on Physics.org that mentions the LiFePO4 cells being a good choice for longevity in EV's. 2014 battery pack cells made by A123 Systems were of this type. These were replaced by LG cells for 2015 model.
The reading level of this "magazine" is well beyond my knowledge and skills but I try to pick out what valuable info I can. So will the "Real" Engineers stand up... I mean comment. There is at least one forum member who stated he works with batteries regularly.
I'd really like to find some unbiased, in depth comparison data between LiFePO4 cells and other compositions. They have been around for a handful of years but good, detailed info is scarce.

http://www.phys.org/news/2015-09-key-lithium-ion-battery-rapidly.html

Enjoy the fun read!

David

 

[gra]

Found a recent article on Physics.org that mentions the LiFePO4 cells being a good choice for longevity in EV's. 2014 battery pack cells made by A123 Systems were of this type. These were replaced by LG cells for 2015 model.
The reading level of this "magazine" is well beyond my knowledge and skills but I try to pick out what valuable info I can. So will the "Real" Engineers stand up... I mean comment. There is at least one forum member who stated he works with batteries regularly.
I'd really like to find some unbiased, in depth comparison data between LiFePO4 cells and other compositions. They have been around for a handful of years but good, detailed info is scarce.

http://www.phys.org/news/2015-09-key-lithium-ion-battery-rapidly.html

Enjoy the fun read!

David

Dont have time to read it right now, but if you want some basic comparison data, here's a good place to start: http://batteryuniversity.com/learn/article/types_of_lithium_ion

I'm a fan of LiFePO4 over LMO; NMC remains unproven over the long term at the moment, and we'll have to see if it holds up to the claims.

 

[dangerHV]

Thank you, Gra. I've been to Battery U. many times and haven't seen this section. (i'm not good with computers) I'm going to print this on individual pages for easy comparison. Excellent start. Now if I can find something along the lines of: cycles to 70%, 2c charge, 1c discharge, @ 90% of rated capacity. Then @80% capacity, and so on. Is this what manufacturers "White Papers" show?
For detailed cell info like this, EXCEPT cycle life, I highly recommend: http://www.lygte-info.dk This guy puts cells thru a battery of tests, (pun not intended, but it sure fits) and graphs all the data. He's done the panasonic NCR18650B, many others from Pan., LG, Sony, Samsung, +++. Huge source of battery data, except, cycle..... life... (tears).
***** edit: Cells tested are only cylindrical type, not pouch or prismatic. ****
David