Re: [EVDL] Car-size fire-blanket smothers EV li-ion fire reignitions

2020-06-23 Thread Bill Dube via EV
On 6/23/2020 1:30 PM, Lawrence Winiarski wrote: Bill Dube ->  Do you mean the solvent is flammable?  UggThat could be a big problem.   Do you know what is used? Ethylene carbonate is a common li-ion cell electrolyte. Wikipedia explains that there are several organic solvents that are

Re: [EVDL] Car-size fire-blanket smothers EV li-ion fire reignitions

2020-06-22 Thread Lawrence Winiarski via EV
Bill Dube ->  Do you mean the solvent is flammable?  UggThat could be a big problem.   Do you know what is used?   Lee Hart ->  I'm sure that would add to the difficulty, but still I would think anything that makes the battery "less" of a batteryand more of a chunk of plastic and foil

Re: [EVDL] Car-size fire-blanket smothers EV li-ion fire reignitions

2020-06-22 Thread paul dove via EV
There is very little electrolyte in a Lithium Ion battery. If you open one up it doesn’t pour out. It is mostly on the pos and neg terminals based on charge state. You might get a few teaspoons. The idea is to only have as much as needed to increase the energy density. More electrolyte

Re: [EVDL] Car-size fire-blanket smothers EV li-ion fire reignitions

2020-06-22 Thread paul dove via EV
Maybe eventually but I think it just burns up all the fuel. It was over 30 minutes ten the the first time and twenty the second time and the fire still wasn’t out. They never actually show the fire out on that Leaf Sent from my iPhone > On Jun 22, 2020, at 1:52 AM, Cor van de Water via EV >

Re: [EVDL] Car-size fire-blanket smothers EV li-ion fire reignitions

2020-06-22 Thread Lee Hart via EV
Bill Dube via EV wrote: This would work for lead acid, where the electrolyte is water based, but li-ion cells have an organic solvent based electrolyte. An additional problem is that the electrolyte is mostly held in the separators between the plates. Depending on the specific type of

Re: [EVDL] Car-size fire-blanket smothers EV li-ion fire reignitions

2020-06-22 Thread Bill Dube via EV
This would work for lead acid, where the electrolyte is water based, but li-ion cells have an organic solvent based electrolyte. Bill D. On 6/22/2020 11:40 AM, Lawrence Winiarski wrote: I had an idea once.   Dump the electrolyte in a fire.   That stops the battery reaction and stops the fire. 

Re: [EVDL] Car-size fire-blanket smothers EV li-ion fire reignitions

2020-06-22 Thread Cor van de Water via EV
The "Triangle of Fire" shows that there are 3 things necessary to sustain a (traditional/house) fire: Fuel, Oxygen and Heat: https://en.wikipedia.org/wiki/Fire_triangle Obviously, in a chemical fire this can change but the idea of fire extinguishing stays the same: Remove *ONE* element of the

Re: [EVDL] Car-size fire-blanket smothers EV li-ion fire reignitions

2020-06-21 Thread paul dove via EV
I’m not buying it. LiCoO2 batteries have their own oxygen source that it why the Dreamliner Halon system didn’t work when they had battery fires. If they left it that battery would have continued to burn. Sent from my iPhone > On Jun 21, 2020, at 3:41 PM, evln via EV wrote: > >  > >

Re: [EVDL] Car-size fire-blanket smothers EV li-ion fire reignitions

2020-06-21 Thread Lawrence Winiarski via EV
I had an idea once.   Dump the electrolyte in a fire.   That stops the battery reaction and stops the fire.   I'd bet you could make a heat sensitive relief valve (at the bottom) and as the battery heats up, it would dump the electrolyte (which is getting hot anyway and would eitherpour via

Re: [EVDL] Car-size fire-blanket smothers EV li-ion fire reignitions

2020-06-21 Thread Bill Dube via EV
This might work, but the fact is that nearly all EVs have metal-oxide (ie cobalt) li-ion cells than make their own oxygen internally. Basically a fire blanket is useless in an EV fire, and might even exacerbate an EV fire by holding in the heat. What works is water applied liberally and