How hot does a lipo battery get when being used by a hexapod? I am asking this because I am designing a regenerative battery system that uses the heat from the Lipo to charge it and cool it at the same time.
What’s the capacity of the LiPo’s you are planning to use? LiPo’s can deliver very large amount of current. A 4000 mAh 20C LiPo can deliver 80 Amp’s and a hexapod doesn’t draw much more than around 8 amp’s. What I’ve experienced is that the LiPo’s doesn’t get hot at all.
Yeah, heat is the enemy of all battery chemistries. We try to prevent them from ever getting hot.
I am using 4 of these: sparkfun.com/commerce/produc … ts_id=8484
They are going to be arranged in 2 pairs of 2 batteries in series, these pairs are put in parrallel ending up with a 12ah 7.2v Lipo.
That’s a pretty cool battery. 3.7vdc, 6Ah and only 3.88 oz. They say it can deliver 2C which is 12 amps, but the wires look a little puny for 12 amps. 
And it can fit inside the Hexapod- Maybe. Also, what is the biggest capacity battery you have been able to fit inside one of your robots?
just remember it’s 12A but 3,7V what gives only 44,4W. wires looks like 0,35-0,5 mm2 which is fine for 45W
Correct:
LiPo can draw a lot of current. With Hexapod Application you will not make them hot.
I use them on Helicopter, Car, Plane. And you need to put them to the limit to make them heat… And that’s not a good idea… LOL
That’s not a LiPo it’s Lithium Ion…!
Take a look Here:
hobbycity.com/hobbycity/store/uh_listCategoriesAndProducts.asp?catname=Car+Hardcase+Packs&idCategory=411&ParentCat=85
Confusing
SparkFun say this is a “Polymer Lithium Ion Battery”
That mens its a LiPo
as in “Lithium Ion Polymer Battery”
But they have turned it around … i think…
see here
en.wikipedia.org/wiki/Lithium-io … er_battery
and
en.wikipedia.org/wiki/Lithium-ion_battery
And as a general rule, LiPo SHALL NEVER go beond “fingerwarm” that is never over 35 deg cent
I have use lipo at higher temps than that. but… not a good idea
Yes It’s confusing on the website. But at the look… it’s like a LiPo…
My 4000Mah 7.4V runs cool as a cucumber under steady prolonged use in my T-Hex, the UBEC on the other hand can get pretty warm.