Recent content by JCrabtree4

  1. J

    LiFePO4 batteries explosion risk mitigation

    Nissan leafs used air cooled batteries until the 3rd generation was released this year. That's the only mass production EV that I'm aware of using air cooled propulsion batteries.
  2. J

    LiFePO4 batteries explosion risk mitigation

    Thermal runaway is a cell-level phenomenon. While it can propagate from cell-to-cell through the pack, it just becomes a multi-cell thermal runaway. Safety standards like UL 2580 do not call out "pack thermal runaway" for a reason, rather they describe cell thermal runaway and propagation to...
  3. J

    LiFePO4 batteries explosion risk mitigation

    I'm not suggesting that you should stick around a lithium battery that's undergoing thermal runaway. Whether it's emitting flames or not, a cell under thermal runaway is dangerous and you shouldn't be anywhere near it without significant PPE including SCBAs. I am simply stating that LFP cells...
  4. J

    LiFePO4 batteries explosion risk mitigation

    LFP cells in thermal runaway are generally not their own ignition source. Typically LFP cells in thermal runaway emit gas, debris, and plastic from the vent. LFP battery fires are typically caused by multiple factors - not just thermal runaway.
  5. J

    LiFePO4 batteries explosion risk mitigation

    All Model Y vehicles use lithium-ion batteries. Nickel Manganese Cobalt (NMC) and Lithium Iron Phosphate (LFP) are both lithium-ion battery chemistries. Tesla’s longer-range and performance models generally use NMC batteries because they are more energy dense, while some...
  6. J

    LiFePO4 batteries explosion risk mitigation

    I am a electric vehicle expert working for a vehicle OEM. I've spent quite a bit of time diagnosing, repairing, and driving engineering improvements for automotive Lithium Iron Phosphate (LFP aka LifePo4) batteries and BMS control logic. LFP cells shouldn't be venting during normal operation...
  7. J

    First Time Garage Owner

    Hello GJ, I purchased my first home a couple years ago in Aubrey, Texas and it came with a 2-car garage! I've been working on building up my tools and doing handyman stuff around the house. Professionally I work as a field service representative for a semi-truck manufacturer and I...
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