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In Reply to: RE: Inmates: Play at your OWN RISK.... posted by jkeny on November 24, 2015 at 00:20:33
no risk of fire or battery explosion with LiFEPO4
So you mean to say a battery that can source current in the 10's of Amperes is not a fire hazard? I suppose the battery itself might not ignite but we're talking about current that can melt wire insulation and can even weld metal.
Follow Ups:
Do you want the truth or just want to be pedantic & argue?The particular formulation of Lithium within LiFePO4 batteries is far more stable than the Lithium batteries that have "scare" stories about them blowing up or catching fire from overcharging.
Kenzo's Bear Gryllis story was comparing apples & bananas.
Of course, there's no accounting for stupidity & I'm sure certain people could find a way to blow them up - by putting them in their microwave, for instance - just as they can blow up their pets by doing the same thing! But that doesn't mean that their pets are a fire hazard
Edits: 11/24/15 11/24/15 11/24/15
"" But that doesn't mean that their pets are a fire hazard""
What if you cat in a pyromaniac?
Certain individuals just love to be negative.
There is always a risk of tire even when one puts a power hungry cpu powered by a kW smps, which is directly connected to the mains (without an isolation transformer).
It is up to diy individuals to find out and know what they are doing.
The negativity comes from a small group who don't want to hear that SQ can be improved easily and safely.
Just have a fire extinguisher nearly!
There is a risk with anything. High voltage with tube amps etc. I think everyone here are adults and can figure these things out.
I have just received my Li capable charger. It's going to take this adult at least 1/2 h to go thru the software based setup procedure. It is difficult to avoid trying to do the easy thing.
Eh, you didn't need a Li smart charger (btw, I hope it's a LiFePO4 one) - as I said already a number of times, a simple regulated 3.3V supply would do fine for trickle charging - we are not discharging & recharging these batteries during this usage
You seem to have a problem with other people not wanting to do what you do. In no way would I accept that 'best' practice is to charge while discharging.
I have 5200 mAH LiPOs which NEED a smart charger.
No problem at all but the whole point of what I detailed in this thread was using a LiFePo4 battery which has a 3.3V output & a discharge curve very suited to the task at hand. The 3.3V output is crucial to this as it avoids regulators & can directly power suitable digital devices - the Regen USB hub chip & clock are two such devices
Your use of Lipo batteries is far from this objective & I wonder why you asked me what were the best LiFePo4 batteries early in the thread?
Please ensure any impressions you post here are qualified by the type of batteries you are using & what regulators you are also using or better still start a new thread on your configurations so as not to pollute this one
It is clear that you have not absorbed the contents of my posts and is determined to defend your own commercial mojo/interest.
I can try and post anything I do to the Regen, as you have done with your battery and charger.
Not being pedantic & argumentative. Just pointing out safety concerns that you choose to ignore.
You can ignore the TRUTH but it's not about the battery formulation... it's about the amount of current the battery can source. I don't care if it's alkaline, lead acid, nickel metal hydride, etc.
If the battery can source 10's of Ampere's of current then there is a fire hazard and safety concerns... not necessarily in the battery itself but with wiring, handling, metal tools, short circuits, etc.
You yourself stated: "...the self noise is likely to be very minimal from a battery that can deliver 60Amps continuously & 120Amps instantaneously.
That kind of current can be a fire hazard, period.
Sure, I also said treat them like a car battery & that I started my car off 4 of them in series.Anybody who doesn't know enough about electricity to know that a car battery should be respected & care taken with it shouldn't be going near opening up an electronic device to tweak it.
Edit: But you are correct to warn about this - I have edited my first post to warn people about the risks, thanks for this heads-up
Edits: 11/24/15 11/24/15
There are inmates here who don't know the hot end of a soldering iron and at least one who has blown up his Tek oscilloscope by probing around where he didn't belong.
Just want to be safe. I would suggest a fuse somewhere inline with the battery. Just a thought.
"There are inmates here who don't know the hot end of a soldering iron "
Been there, done that. That was a painful lesson. Also managed to touch an RF antenna coupler handling 1 KW at 7 Mhz. This was not painful in the least, and I didn't notice anything until I smelled burning flesh. Fortunately, there was no significant damage. Worst, I somehow managed to touch the secondary of a neon sign transformer, or at least that's my theory. I don't recall the details, just coming to in a pile on the opposite side of the room. (These events were more than 50 years ago.)
Tony Lauck
"Diversity is the law of nature; no two entities in this universe are uniform." - P.R. Sarkar
Sure, I've put a warning on my first post
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