James 1:19-20
Not all those who wander are lost - J. R. R. Tolkien
'Theoretically this level of creeping Orwellian dynamics should ramp up our awareness, but what happens instead is that each alert becomes less and less effective because we're incredibly stupid.' - Jerry Holkins
Dillon Nichols wrote:..but running a bunch stuck together is outside my risk tolerance unless there is cell-level monitoring/shutoff involved at a minimum.
Mike Lang wrote:
Dillon Nichols wrote:..but running a bunch stuck together is outside my risk tolerance unless there is cell-level monitoring/shutoff involved at a minimum.
I'm sure this wasn't your intention, but this implies cell-level monitoring is optional when chaining LiIon cells together. I'm not an electrician, but I'm pretty sure it is mandatory.
James 1:19-20
Not all those who wander are lost - J. R. R. Tolkien
James 1:19-20
Not all those who wander are lost - J. R. R. Tolkien
'Theoretically this level of creeping Orwellian dynamics should ramp up our awareness, but what happens instead is that each alert becomes less and less effective because we're incredibly stupid.' - Jerry Holkins
Life on a farm is a school of patience; you can't hurry the crops or make an ox in two days.
Henri Alain
Right now, scooter hacking is becoming one of the most interesting adventures in modern-day hacking. You’ve got batteries and electronics and motors just sitting there, ready for the taking (and yes, through these auctions you can do this legally). We’re looking at a future filled with 18650-based Powerwalls from discarded electric scooters and quadcopters built around scooter motors filling the skies.
Pecan Media: food forestry and forest garden ebooks
Now available: The Native Persimmon (centennial edition)
Dillon Nichols wrote:Linked below is a thread detailing the experience of a very unlucky person who had a pair of CR123A flashlight batteries blow up in the same room as him. These are 1/2 the size of an 18650; while the chemistry differs, both have the potential for hydrofluoric acid poisoning as described in the linked thread.
http://www.candlepowerforums.com/vb/showthread.php?340028-Flashlight-Explosion
James 1:19-20
Not all those who wander are lost - J. R. R. Tolkien
Caleb Mayfield wrote: ...and only Primary (non-rechargeable) cells based on the Li-(CF)x chemistry can produce Hydrofluoric Acid as that is the only current Lithium based chemistry with Fluorine atoms.
Ken Zemach wrote:
I applaud anyone's efforts to do home-builds as I love the can-do attitude, but from what I'm reading here, just don't think for a second that your build is going to be 'safe.' I'm not saying that it's not going to work and possibly work well for years, but that doesn't mean it's inherently safe.
Gardens in my mind never need water
Castles in the air never have a wet basement
Well made buildings are fractal -- equally intelligent design at every level of detail.
Bright sparks remind others that they too can dance
What I am looking for is looking for me too!
Pearl Sutton wrote:What WOULD be safe then? I can't afford (and don't want) a premade powerwall, I will need something of this ilk at some point, what IS safe? I read your post and all the unsafe things, what is left? What is a good answer? You have a LOT more experience than me, what do I need to look at?
Gardens in my mind never need water
Castles in the air never have a wet basement
Well made buildings are fractal -- equally intelligent design at every level of detail.
Bright sparks remind others that they too can dance
What I am looking for is looking for me too!
Ken Zemach wrote:
I am betting you don't have a calgonate kit on hand in case you get some electrolyte on your skin. I'm betting you don't know how HF goes into your skin, and then effectively continuously leaches calcium out of your bones which if it happens to a large enough extent is painful, debilitating, and completely untreatable once it happens (unless you treat with calgonate quickly). Which is why no one in our cell chemistry lab is allowed to work with or open cells until they've taken HF training along with specific cell safety training.
Ken Zemach wrote:
... but from what I'm reading here, just don't think for a second that your build is going to be 'safe.' I'm not saying that it's not going to work and possibly work well for years, but that doesn't mean it's inherently safe.
James 1:19-20
Not all those who wander are lost - J. R. R. Tolkien
James 1:19-20
Not all those who wander are lost - J. R. R. Tolkien
James 1:19-20
Not all those who wander are lost - J. R. R. Tolkien
James 1:19-20
Not all those who wander are lost - J. R. R. Tolkien
Life on a farm is a school of patience; you can't hurry the crops or make an ox in two days.
Henri Alain
James 1:19-20
Not all those who wander are lost - J. R. R. Tolkien
Caleb Mayfield wrote:You are fortunate if you have a steady supply of those. I'm trying to locate one where I am at. Those packs are generally some of the best second hand batteries you can get as they either see few cycles or light loads.
Life on a farm is a school of patience; you can't hurry the crops or make an ox in two days.
Henri Alain
Been there. Done that. Went back for more. But this time, I took this tiny ad with me:
A PDC for cold climate homesteaders
http://permaculture-design-course.com
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