Using packs in parallel with dual ESC's

[FighterCat57]

Good idea? Bad idea?

From what I've known, the dual ESC setup should both be running off of the same battery pack.

I am considering setting up something like the following: (pic snagged off Google- ignore the notations)
________
MEDICAL MARIJUANA CARD

[FighterCat57]

I know it's a silly question, I've just seen both and curious if there's any big pro's or cons.

I would think using the packs in parallel would help even power distribution. I am concerned though that the ESC might sense something from the other ESC on the power in and thought I'd ask before making an "X" connector setup.
________
Mflb

[Rumdog]

Why not just run everything seperate as 2 different systems? That's how I do it!

[FighterCat57]

Why not just run everything seperate as 2 different systems? That's how I do it!

I keep coming across diagrams showing the battery packs in parallel and am curious if there's a good reason to do it or not.


Right now they are separate and I'm not having any issues. Just curious if there's an advantage or disadvantage beyond the obvious.
________
F Platform

[bonewar]

When you run twins, the inside turning motor tends to draw more amps and power.

So if you run the setup as 2 systems you will always come in from a run with 1 of the lipo's at a lower voltage then the other lipo.

Having both esc's seeing both packs at the end of your run both the lipo's will have the same voltage , much safer on your lipo's if your pushing your boat.

Makes it easy to look after your expensive lipo's to.

Heres a pic to show you my parallel connections for the twin cat.

I've been running this setup in my Simrad cat for over a year now with no problems .

Bonewar

[Rumdog]

That's IF you onlt turn in 1 direction. One of the advantages of twins is the ability to turn just as good in either direction.

[FighterCat57]

OK, cool. So there's no risk to the ESC. That's my main concern. I don't currently have any wired that way and didn't want to risk the ESC with trial and error.

If I start seeing really varied pack voltages at the end of the runs, I'll most likely wire it up that way. Seems logical if there's juice left to use it. (Racing advantages/disadvantages aside)
________
WHOLESALE VAPORIZER

[bonewar]

Rumdog,

The idea is to keep a balance setup.

I time my runs and the lipo's come in every time at the same voltage.

When i first started to run the cat(timed runs) i had 2 separate systems .
Twice i had 1 of the lipos come in under the cut off .
Not good for cell life.
So i change to the new setup and no problems .
I don't race my cats and i run them in both directions.

Bonewar

[m4a1usr]

Twice i had 1 of the lipos come in under the cut off .
Not good for cell life.

Thats why if you care about your packs you should be using a Cell Shield. It monitors each cell in a pack and shuts you down because of the weak cell. Not the packs average voltage like almost all LVC devices do. Its not mandatory but if you have spendy packs its your best protection.

John

[FighterCat57]

Thats why if you care about your packs you should be using a Cell Shield. It monitors each cell in a pack and shuts you down because of the weak cell. Not the packs average voltage like almost all LVC devices do. Its not mandatory but if you have spendy packs its your best protection.

John

I run one of those, they are great! Mine's not a cut off rather it's a really loud alarm that goes off if any single cell is near cut off. Good stuff.
________
Vaporizer Store

[BakedMopar]

When running your esc's in parallel both systems see the exact same voltage. When running them seperatly if one packs lower that system will be slower. Your boat may end up with heating and or handling problems. Heres how I run my twin cat.

Then again it's really up to you!