Dynamite? Interesting....

[Doctorbass]

"In summary, the energy (measured in "Joules") stored in a 36 V, 15 Ah (15,000 mAh) battery is 36x15= 540 "Volt-Amp-hours" or Watt - hours. Where a Volt-Amp-hour (Wh) is 3600 Joules (J). So our battery has stored 1,944,000 Joules of energy!
That's pretty close to the ~2,110,000 Joules in a stick of dynamite? A good reason to respect storage batteries!"

source:http://www.rc-electronics-usa.com/battery-electronics-101.html

Doc

 

[eP]

That's pretty close to the ~2,110,000 Joules in a stick of dynamite? A good reason to respect storage batteries!"

source:http://www.rc-electronics-usa.com/battery-electronics-101.html

Doc

That isn't a good reason.

Try to compare times by the energy is relased.
For 30C rate that time is 2 minutes = 120 seconds.

For dynamite that time is less than 0.01 sec.

 

[CGameProgrammer]

A 12V 12Ah lead-acid battery weighs 9.5 lbs. If the entire mass if it were converted to energy, the energy released would be 387,900,000,000,000,000 Joules, according to E=mc^2. But obviously that's not going to happen, and similarly, a battery is not going to discharge completely in less than a second.

 

[Mathurin]

Well, the energy at which you hit something is mass X speed^2. So if you weigh 70kg, your bike 25 and you're going 40mph, that's (95kg * 2394m2/s2) = 227430 joules of force at impact... this is equivalent to 54357 calories (not kilocalories), and that's equivalent to the energy of ~1 Almond Snickers. So you're essentially stuffing a Snickers bar at whoever you hit, which is very rude.

 

[Toorbough ULL-Zeveigh]

A 12V 12Ah lead-acid battery weighs 9.5 lbs. If the entire mass if it were converted to energy, the energy released would be 387,900,000,000,000,000 Joules, according to E=mc^2. But obviously that's not going to happen, and similarly, a battery is not going to discharge completely in less than a second.

If you put a wire across the terminals, or mebee drive a nail thru the plates, it might not be less than a second but fast enuf. But that's never likely to happen, is it? It's not like it's possible that an ebike could ever tip over or crash into something at speed. Would you wear a bandolier or backpack of dynamite & hop on for an ebike ride?

 

[Malcolm]

So you're essentially stuffing a Snickers bar at whoever you hit, which is very rude

Made me laugh. Thank you :lol:

 

[TylerDurden]

We would be well advised to respect the hydrogen that vents off storage cells...

Also, there are still a great number of LiPo cells in use, that need TLC...

8)


MMmmmmmmm...... snickers......