lipo battery 14AWG wire connector, will this melt the wire?

Batteries, Chargers, and Battery Management Systems.
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cgokey   1 W

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LIPO battery 14AWG wire connector, will this melt the wire?

Post by cgokey » Jun 28 2016 7:46pm

So I was hoping that someone could clear up some confusion on my end...

So I've got a controller that will draw max 30A... I was thinking of experimenting with hooking up two lipo batteries in series (6S, 10C, 5200mAh, 22.4v but hooked in series)
Screen Shot 2016-06-28 at 8.33.58 PM.png
Screen Shot 2016-06-28 at 8.33.58 PM.png (263.6 KiB) Viewed 1256 times
http://www.hobbyking.com/hobbyking/stor ... _Pack.html

But i noticed the wire coming out of the lipo battery is only 14AWG. Yet according to this, this battery has a 52A continuous discharge, right?
https://www.commonsenserc.com/page.php? ... ained.html

So why would this only have 14AWG wire coming out of the battery? Isn't 14AWG rated at like 15A?

Chris

cgokey   1 W

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lipo battery 14AWG wire connector, will this melt the wire?

Post by cgokey » Jun 28 2016 8:58pm

I posted this over on the eBike forum, but thinking maybe this forum might be more appropriate...

---------

So I was hoping that someone could clear up some confusion on my end...

So I've got a ebike controller that will draw max 30A... I was thinking of experimenting with hooking up two lipo batteries in series (6S, 10C, 5200mAh, 22.4v each but hooked in series)
Screen Shot 2016-06-28 at 8.33.58 PM.png
http://www.hobbyking.com/hobbyking/stor ... _Pack.html

But i noticed the wire coming out of the lipo battery is only 14AWG. Yet according to this, this battery has a 52A continuous discharge...
https://www.commonsenserc.com/page.php? ... ained.html

So why would this only have 14AWG wire coming out of the battery if it is rated at 52A continuous dischange? Isn't 14AWG rated at like 15A? Am I going to melt my wire? Or will I be fine since it is such a short wire? This wire will be connected to a 10AWG wire going to the controller with about a 3 foot run.

Chris

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ddk   1 MW

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Re: LIPO battery 14AWG wire connector, will this melt the wi

Post by ddk » Jun 28 2016 9:24pm

current capacity of wire is determined by both cross-area (14G) and length (inches?)
and a few inches of 14G can safely carry over 100A
Melting insulation is determined by type. Usually lithium batteries for R/C applications use silicon-coated wire rated for 200C before melting.

...search for wire gauge calculator to get the hoary details.
"How can we play Hot Wheels without lighter fluid? " -Serge

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dogman dan   100 GW

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Re: lipo battery 14AWG wire connector, will this melt the wi

Post by dogman dan » Jun 29 2016 5:25am

And its a few inches of wire, not feet.

They also know how much voltage sag there will be if you really did pull 50 amps from that thing. :wink:

14g silicone fine for 30 amps, but for a long run of wire on the bike up to 12. If it plugs straight into the controller no problem.

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spinningmagnets   100 GW

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Re: lipo battery 14AWG wire connector, will this melt the wi

Post by spinningmagnets » Jun 29 2016 5:34am

Even though your controller has a 30A maximum draw...you will only occasionally see that kind of amp-flow. The majority of the ride, the amps will be maybe half of that (15A?), or even less.

These batteries are not advertised for ebikes, they are for RC helicopters, and models like that. When it comes to Chinese motors, controllers, and batteries, you need to ask the forum for what works, because the advertisements and data listed in the catalog are all very misleading. Some are too high on purpose, some too low.

They will keep putting 14ga wire on this particular model of battery, until enough customers ask for this battery with fatter wire.

cgokey   1 W

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Re: LIPO battery 14AWG wire connector, will this melt the wi

Post by cgokey » Jul 01 2016 6:10pm

ddk wrote:current capacity of wire is determined by both cross-area (14G) and length (inches?)
and a few inches of 14G can safely carry over 100A
Melting insulation is determined by type. Usually lithium batteries for R/C applications use silicon-coated wire rated for 200C before melting.

...search for wire gauge calculator to get the hoary details.
So I built a small series harness with those two little lipo batteries, batteries works great! Multimeter is reporting 50V... And was thankful that I didn't see any smoke coming out of the bag behind the seat. Seems the 14AWG is fine given how short the wire is.

Thanks for all the responses.
Chris

atomek1000   100 W

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Re: lipo battery 14AWG wire connector, will this melt the wi

Post by atomek1000 » Jul 03 2016 4:10pm

You are totally fine with 14awg for 30A controller. As other pointed out you will only see 30A during hard acceleration but still this wire would be happy to see 30A constant..

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