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Model 3 Pack: Intumescent goo?

Discussion in 'Model 3: Battery & Charging' started by scaesare, Apr 27, 2018.

  1. scaesare

    scaesare Well-Known Member

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    So some time back there was a thread discussing Tesla's battery patents.

    Among them was a patent for an intumescent fire retardant (goo). It's layer(s) of material that expand rapidly during heating, thus extracting the heat from the cell and helping quench any fire.

    It appears that Tesla didn't implement that in the Model S pack, as number of them have been torn down, and although there's glue holding the cells together within the modules, that's it.

    With the recent Munro & Assoc. teardown, we have some pics inside the pack. Amongst them is an interesting green layer of goo encasing the cells:

    [​IMG]

    [​IMG]

    [​IMG]

    I wonder if this is possibly an implementation of the patent?

    It could certainly be different adhesive, but if so it seems interesting that it's also on the tops of the cells (and ostensibly the bottom). It's as if the whole plastic battery module casing assembly has been backfilled with that material.
     
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  2. LukasSwan

    LukasSwan Member

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    I was thinking the same thing when looking at oics
     
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  3. ratsbew

    ratsbew Member

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    I'm very surprised that we haven't seen more discussion about the battery teardown. Any chance it also helps extract heat from the pack and spread it to the coolant better?
     
  4. scaesare

    scaesare Well-Known Member

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    Not sure about heat spread. If anything it might insulate that effect slightly.

    So in Jack Rickard's teardown video on EVTV, he also refers to this coating as intumescent material....
     

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