Failure Analysis of Arizona Li Ion based Battery Energy Storage Unit

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Failure analysis of a large Li Ion based energy storage system. Dendrite growth, shorted cell (larger pouch based), thermal runaway caused multiple cells to fail, flammable gasses built up in building, firefighters opened doors, and explosion occurred (numerous firefighters injured, one still not fully recovered???).

Via Candlepowerforums:

Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset


  • mike95490
    mike95490 Solar Expert Posts: 9,583 ✭✭✭✭✭
    We only use the best !!

    Powerfab top of pole PV mount | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
    || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
    || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

    gen: ,

  • Dave Angelini
    Dave Angelini Solar Expert Posts: 6,711 ✭✭✭✭✭✭
    mike95490 said:
    We only use the best !!

    That is what LG said....... They deny that their batteries were the cause in Bill's post.

     They may not have been the fuse, they definitely were the bomb. IMO.
    "we go where power lines don't" Sierra Nevada mountain area
    E-mail [email protected]