Lipo Fire on Chick Bike

[icecube57]

Oh sweet baby Jesus in a manger.

[RallySTX]

Had to stop myself from licking my monitor!
Brian L.

[wojtek]

GUYS PLEASE STAY PROFESSIONAL....

ps what is her phone number again?

[Green Machine]

Yeah lets get back to lipo battery safety.

[wojtek]

i was using 20c zippy - no issues. Now i got 30c turnigy.

the battery box made of lightweight diecast alumunium. I put the electric tape inside to avoid problems + Sound Deadening Pads + some extra coushioning to absorb any shocks. I made sure it is tight inside [did you? ]

+ the common sense = charging up to 4.15v max, discharging not lower than 3.6v and balance charging.

[Green Machine]

Meh...wojtek i was just joking about lipo safety. Although this is great example of what can go wrong I admit it and i know i am going to get flamed for what i am about to say, but this thread is all about the benefits of lipo danger. In this case lipo danger created a rare thread about hot chicks on flaming bikes. The moral of this story is we need to throw lipo safety out the window when it comes to riding (lets still be safe while charging guys) but be sure to pack a video camera on our rides and have the where with all to pull that camera out first thing when fire breaks out.

Seriously the real moral story here is all singles ESers (or ES cheaters) need to have an extra chick bike around for when the opportunity rises.

All ESers who are single should start building a chick bike ASAP...with flowers and wicker baskets etc. And load that basket with the densist most volatile lipo you can find.

By the way the daisy electra in this video makes a terrific chick bike...can't say enough about it. Steel frame and forks, surprisingly light weight and sturdy as well. And it totally survived this fire! I think most other bikes would have melted.

Ebiking makes a great date. Better, safer and way cheaper than taking them up in private plane for example. I have taken a lot of friends who are girls on that bike and they just love it. Its like some weird thrill ride for them.

And its hard to preach safety etc when a few hours before this video we were flying over the same golden gate park in a cessna. Now thats dangerous. Fire risk and all. If you think a little lipo fire is going to damage ebiking, small planes crash all the time in gigantic fireball messes and there is no pubic outrage to ban private flying.

And before i fly i go through a 20 minute checklist and it is a hassle but morally and legally you have to do it. If i followed a pre ride checklist on my bikes, and was super super careful (ie no detour through the frisbee golf course) this mishap would have never happened and the day would have played out differently. Also i would ride a frock of a lot less.

And this thread would have never happened and we wouldnt be sharing these precious moments complete with pics and video now.

Did you hear the flaming bike video made the classic ES video thread?

My life might be totally different this morning if it wasnt for lipo danger.

[Gordo]

As the Mini-Minor driver with the beautiful girl explained to the lonely guy with the new Corvette; "When I get lonely, I just hang it out the window."
Even a fat guy on an e-bike should have more going for him than a couch potato in the 'vette.

[EBJ]

Even a fat guy on an e-bike should have more going for him than a couch potato in the 'vette.

I agree if he built the bike.

[texaspyro]

Had to stop myself from licking my monitor!

I didn't Does she have a sister? Or two?

[Green Machine]

Aftermath...

Today finally got my act together and went to retrieve burned out bike.

FIrst returned to the frisbee golf course to remove lithium battery debris.

And then returned to retrieve the bike still locked to post in parking garage:

Here you can see the damage. The metal battery tray that strapped the battery in kept the fire from damaging the bike. Only cosmetic burn marks to the fender.



Here is the batter tray itself which i think could have punctured one of the cells and started the fire...you can see the sharp edges:

And finally here is video of entire bike:

[liveforphysics]

That is so well done my friend.

My hat's off to you. This is my favorite ebike carnage to date.


Yes, intended pun trio.

[Green Machine]

That is so well done my friend.

My hat's off to you. This is my favorite ebike carnage to date.


Yes, intended pun trio.

Favorite ebike carnage ever?

Wow i am pretty honored if your serious.

Its like danny makaskill saying thats my favorite bike crash or something

Now i absolutely have no regrets.

I will try to dig up some picture of the bike before the fire.

[nebriancent]

[quote=" I'm trying to think of materials that are durable, non-combustible, withstand high temperatures and also non-conductive. Metal is great except cell connections can short out against it.[/quote]

try uhmw its a heat/wear resistant polymer we use at work all the time(millwright in a tire recycling plant)

[fechter]

try uhmw its a heat/wear resistant polymer we use at work all the time(millwright in a tire recycling plant)

You mean uhmw polyethylene?

[liveforphysics]

That is so well done my friend.

My hat's off to you. This is my favorite ebike carnage to date.


Yes, intended pun trio.

Favorite ebike carnage ever?

Wow i am pretty honored if your serious.

I'm dead serious. The flowers on the bike. The wicker basket. The uber-girly colors combined with the open billowing flames, and knowing that it happened naturally in the wild, not just some planned intentional thing, it combines to make it my favorite ebike carnage to date.

It is art.

My hat is off to you sir.

-Luke

[texaspyro]

UHMW is good stuff... but being polyethylene it is still a wax. Just about impossible to glue. And it does burn... but very slowly... much less than wicker.

[hinv]

LFP: Are the cheap Turnigy packs at http://www.hobbyking.com/hobbycity/stor ... oduct=9176 very dangerous? I noticed that the cells have a 3.7V (22.2/6) rating...and they are cheap at under $42 each.

Thanks,
hinv

[fechter]

Here's something I found that looks like it would fit those Batteryspace packs nicely:
http://www.lunchboxes.com/lunchbox.html

lunchboxshop.gif (35.3 KiB) Viewed 511 times

measures about 7.75 inches wide, 6.75 tall, and 4 deep.
It has a convenient handle and should do a good job of preventing your bike (or house) from burning down in the event of a cell failure. Then one in the link is plain metal, but these things come in a huge assortment of styles.

For the girl bike, how about this one:

lunchboxshop_Hello Kitty.gif (24.49 KiB) Viewed 511 times

You can get them printed with custom artwork too. How about an Endless Sphere box?
You still need some kind of padding inside and a way to feed the wires out. A Romex clamp electrical fitting would be good for where the wires exit. A couple of sheet metal screws could be used to keep it closed.

[999zip999]

I will take one with the rifleman.

[nebriancent]

i ment use the UHMW to line a steel box
then its non cunductive
heat and ware resistant
and itl take some punishment



could also instead of line a box just construct a cage from angle iron
i meen thats what i am going to do for the pack im building using docs makita batteries wen he gets more in

[Green Machine]

I think those lunch boxes are good. Could the lunch boxes actually explode if vent holes are not made?

I am going to order one...i will photograph results.

Also any cage or metal basket would have contained the fire as well.

[miniebiker]

That is so well done my friend.

My hat's off to you. This is my favorite ebike carnage to date.


Yes, intended pun trio.

Favorite ebike carnage ever?

Wow i am pretty honored if your serious.

I'm dead serious. The flowers on the bike. The wicker basket. The uber-girly colors combined with the open billowing flames, and knowing that it happened naturally in the wild, not just some planned intentional thing, it combines to make it my favorite ebike carnage to date.

It is art.

My hat is off to you sir.

-Luke

I'm thinkin some of youse guys are pyros !

[vanilla ice]

Lunch box would certainly conduct heat better than a charge bag. Bags don't have the conducting issue tho, and I've never had heat probs using bags.

[fechter]

I think those lunch boxes are good. Could the lunch boxes actually explode if vent holes are not made?

I am going to order one...i will photograph results.

Also any cage or metal basket would have contained the fire as well.

I don't think it could explode unless you completely glued the lid shut. If there was a sudden pressure increase, I'd expect a corner of the lid to bend up enough to vent the pressure. Based on the video of the pack going off inside the metal cash box, I think it would be rather unexciting. Lots of smoke, no flames. This could probably go off inside your house without burning it down.

Nomex paper would be good to insulate the metal surface inside to prevent shorts. Fiberglass sheets are good too. Good old fashioned "fish paper" would be pretty economical. Most packs have some kind of insulaton, but you don't want it to rub through. None of that would be needed if the cushioning prevents contact with the box.

I was trying to figure out a good way to cushion the pack. If the pack was supported along each edge and the corners, but open elsewhere, it would be pretty crash resistant and still be able to dissipate some heat. If heat is not an issue, the self-expanding foam in a plastic bag would certainly make it crash resistant.

[Harold in CR]

Old boat seats usually have closed cell foam. Cut to fit the box, then cut out for batteries, then slice the cutout pieces to fit under and over the batteries, and super glue those back in place, on the bottom. Tops, just put in place over the batteries. Could take a 5' drop without damage to the batteries.

Just do a "push" test on the seats. Mushy is open cell and gets waterlogged. Closed cell does not. It's firmer, also.