Question about , lipo's amps, and fast chargeing - Page 2 - RC-Monster Forums

BrianG · 05.13.2011, 11:04 AM

I'd install a 50A or even 60A fuse then. Fuses are meant to be protection against catastrophic failure and not affect the circuit under normal operation, nor are they meant to run near their fuse value. Upping the value a little won't hurt the protection at all and will not be so hot - that is if the heat is coming from the fuse itself and not the connectors/wiring.

However if the fuses are the ATO/ATC type, 40A is the max size available IIRC and would have to replace it with something a little larger, like a mini-wafer fuse (the larger ones are just too darn big). Or I suppose you could parallel a couple 30A ATC fuses/holders.

snellemin · 05.13.2011, 11:08 AM

Quote:

Originally Posted by feistyacorn

Thats awesome! Can we see a pic?

Here is a iphone pic

Whenever these fuses go, I'll upgrade them again.

feistyacorn · 05.13.2011, 01:22 PM

Quote:

Originally Posted by snellemin

Here is a iphone pic

Whenever these fuses go, I'll upgrade them again.

Snellemin... that looks hilariously awesome!

snellemin · 05.13.2011, 01:28 PM

I could make it funnier and heatsink the fuse on both sides.

feistyacorn · 05.13.2011, 01:32 PM

Quote:

Originally Posted by snellemin

I could make it funnier and heatsink the fuse on both sides.

It just goes to show how powerful the Powerlab 8 is.

snellemin · 05.13.2011, 01:48 PM

Ok I just added a second heatsink. This is maxamps approved.

BrianG · 05.13.2011, 02:05 PM

Quote:

Originally Posted by snellemin

Ok I just added a second heatsink. This is maxamps approved...

Wrong! Where are the flame stickers? Sheesh! I thought we went over this in detail? You would only need one heatsink if it has a flame sticker since everyone knows they instantly and automatically double, if not triple, the performance.

snellemin · 05.13.2011, 02:16 PM

This is the prototype Brian. The stickers will be wrapped around the heatsink and produce a supercooling effect. Crossdrilling of the plugs and wires are being considered. Crap, I just leaked out the future patent.

hoober · 05.13.2011, 08:43 PM

Quote:

Originally Posted by candy76man

So does anyone know for sure what a lipo will do if you charge it too fast? Will it just start gassing (getting puffy) or would it start heating up? Or maybe neither and it just shortens the usable life of the battery with no outward signs that it's being stressed?

I know what happens to all of my packs when charged "too fast". Nothing.

sikeston34m · 05.13.2011, 09:02 PM

Quote:

Originally Posted by snellemin

Ok I just added a second heatsink. This is maxamps approved.

Maybe add a fan?

DrKnow65 · 05.14.2011, 12:38 AM

Why 2 fuses??? It is a circuit and opening one leg negates the need to open the other.
An open circuit is an open circuit...

What's_nitro? · 12:47 AM

There's too much power for one fuse to handle. The excess power from one fuse jumps to the other wire automatically. By using two fuses he effectively doubled the burst rating* of the charger.

*Burst rating = (((Fuse 1)(Fuse 2))/(Pi*Cake)^(C^(Flame Sticker)))*0

snellemin · 05.14.2011, 01:57 PM

There is awalys the potential I could plug in the battery in reverse and power on/enable the charger, hence the fuse on the negative wire.

BrianG · 05.14.2011, 03:06 PM

Still wouldn't matter...

snellemin · 04:01 PM

It does matter. It doesn't matter at the charger input side. But at the output side it does, as there are relays circuits involved on both the main outputs and balancing output.
One fuse will always blow first, which is better then having to depend on one fuse that can blow at a slower rate.