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Brief introduction of LFP vs NMC battery chemistries

Discussion in 'EV (Electric Vehicle) Discussion' started by bwilson4web, Sep 14, 2022.

  1. bwilson4web

    bwilson4web BMW i3 and Model 3

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    BTW, there are several nickel cathode compounds, NCA/NMC chemistries. My understanding from Munro is today, Tesla uses 8 parts nickel, 1 part manganese, and 1 part cobalt, NMC, but in the past has used NCA, nickel, cobalt, aluminum. Regardless, here is the video:


    Here is a survey article discussing NMC, NCA, and LFP battery chemistries. My 2019 Tesla Model 3 Standard Range Plus, single motor, rear drive may be NMC.

    Bob Wilson
     
    #1 bwilson4web, Sep 14, 2022
    Last edited: Sep 14, 2022
    drash likes this.
  2. john1701a

    john1701a Prius Guru

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    Tesla has been selling a lot with LFP cells. It still looks like the AWD model of bZ4X for North America will use LFP cells too. If is the case and Toyota is indeed quietly diversifying, it could put quite a twist on the supposed binary tepid market.
     
    #2 john1701a, Sep 14, 2022
  3. Trollbait

    Trollbait It's a D&D thing

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    #3 Trollbait, Sep 14, 2022
  4. drash

    drash Senior Member

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    If Toyota were using LTO cells you could charge and discharge at 10C even down to -50℃ and up to +60℃ and would last for 25,000 cycles at 100% DoD. Yes these are supercells: https://batterytalks.com/products/scib-toshiba-prismatic-2-4v-20ah-cells

    But....:eek: That would be weird. SCiB cells have a nominal voltage of 2.4V so 48 Wh per cell if using 20 Ah cells as it says in the article. That means they would need 10 modules of 149 cells to get to 71.4 kWh for a 355V pack. At 515g/cell that would be a 767 kg (1,692 lbs) battery (cell weight only without packaging and electronics) or 40% of the total weight of the bZ4X. Oh and they are horrifyingly expensive. The European site says the 71.4 kWh battery pack has 96 cells (Specification sheet 2022 bZ4X). Needless to say I have my doubts.
     
    #4 drash, Sep 14, 2022
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