United States, July 14 -- Ultium Cells LLC, a joint venture between General Motors and LG Energy Solution, will upgrade its Spring Hill, Tennessee battery cell manufacturing facility to scale production of low-cost lithium iron phosphate battery cells, building on a $2.3 billion investment announced in 2021. Conversion of battery cell lines at Spring Hill to produce LFP cells will begin later this year, with commercial production expected by late 2027. GM's flexible EV platform has been architected to enable the quick integration of multiple cell chemistries and form factors. The Ultium Cells plant in Warren, Ohio will continue producing cells with nickel cobalt manganese aluminum chemistry, which has been key to GM delivering a range of cr...