Battery Temps to High. ?

[704Authentic]

After a bit of hard running on cool lake water, Temps are as follows:

Motor 75
ESC 80
Batteries 125-130

Is that normal? ... something incorrect?


Thanks,

[photohoward1]

Motor and ESC are perfect. How long did you run and what is the set-up. Batts get hotter as they approach low voltage cut-off. Best not to let bats go below 20%.

We nee the total set-up picture to evaluate.

[704Authentic]

What's the high and low numbers for ' Happy Battery Temps.'
6 -10 min. run times.

AquaCraft Wildcat EP, Leopard 3650 / 2450 kv, ProBoat 60amp esc, Stilleto 1.6 x 2.5 prop. 14.4v.

[TristanJones]

50-70degC i've been told, thats for cheap chinese batteries, not sure if that matters or not.
My 4AH would see 75degC after 5-7mind hard running, no puff ups still balance fine and run great....

Hope that helps somehow.

[drwayne]

50-70degC i've been told, thats for cheap chinese batteries, not sure if that matters or not.
My 4AH would see 75degC after 5-7mind hard running, no puff ups still balance fine and run great....

Hope that helps somehow.

OMG that's some bad advice right there. :shock:

75'c is terminal for lipo cells....

Overheated cells fail, and reheat quicker.. .. before they self immolate

'Optimal' finish temp is below 50'c ( 130f )

There is a battery header on main forum.. go there for good solid advice.

burn and learn.

DocW

[TristanJones]

well there ya go

[704Authentic]

Thanks guys!

[keithbradley]

That's not bad for such a long run. Judging by your temps I would guess that you are running in some pretty cold water...that's the only explanation for your very low ESC and motor temps. I would also assume that if you took ESC temps at the caps they would be significantly higher.

I use 140F as the cut off for lipos, but I try to keep them cooler than that if possible. Doc's advice of under 130F is pretty reasonable.

[704Authentic]

Thanks. ...better now.

FYI - Temps taken from all over ESC, caps were the hottest, 80.
Water temp 50-55 :)

Thanks again,

[keithbradley]

Thanks. ...better now.

FYI - Temps taken from all over ESC, caps were the hottest, 80.
Water temp 50-55 :)

Thanks again,

In that case, it is a little abnormal for battery temps to be that much hotter than everything else. It's ok that your batteries get 125-130 F, but it is odd that the caps are 80 and the lipos are 125-130.