frankiebonez

iTrader: (8)

Maybe I should be a bit more specific. What is the equation or math that I need to do to determine how long a 5000mah 3s battery with a 60c rating will charge at a predetermined rate? I dont know the mathematics behind the charging rates is my thing. People say this battery will be charged in 20 minutes @ 20amps and 24v... what math did yo do to come to that conclusion?

Thanks!

crusey_aus

iTrader: (3)

Charge rates

5000mah sized pack
1c charge rate = 5 amps / 1 hour
2c charge rate = 10 amps / 30 minutes
5c charge rate = 25 amps / 12 minutes


Parallel you simply add the pack capacities

2 x 5000mah sized packs
10000mah total

1c = 10 amps
2c = 20 amps


Charger power requirements

2s pack
5 amps x 8.4v = 42 watts

3s pack
5 amps x 12.6v = 63 watts


Generally speaking your power supply will be rated 20% higher than your charger

1000 watt charger = 1200 watt power supply

Charger manufacturer will list the voltage and current requirements to reach full output of the charger

Read this website for basic info

http://www.tjinguytech.com/charging-how-tos


Cheers

jnslprd

iTrader: (5)

http://www.amainhobbies.com/product_...ger-w-Balancer

Are the batteries that come with the car capable of higher charging rates?

crusey_aus

iTrader: (3)

1c unless otherwise stated, 2c is just about the norm these days, 5c is common

Some manufacturers specify as high as 10c

Cheers

frankiebonez

iTrader: (8)

I'm having a problem with the cellpro right now and determining which type of balance plug I need.... I dont know what kind is the normal 3-pin white plug that I have on just about all my batteries. Its the standard plug on my Venom and Sky Lipo batteries... Is that the type of plug that comes on this cellpro balance board? http://www.revolectrix.com/MPA_XH.htm

The next set of batteries I'm buying will have bullet connectors so I can change to whatever I want at that point.

Ok now I need a power supply. That charger is ordered up woohoo! Can someone point me to where I can score a good power supply setup?

frankiebonez

iTrader: (8)

This is the info I was looking for bud, thanks so much for your help in this thread!!

crusey_aus

iTrader: (3)

JST-XH is pretty much the industry standard for balance leads, with a few using something else

Power supply is going to cost you more than the charger itself unless you build / modify one yourself

This guy sells modified computer power supplys

http://www.feathermerchantrc.com/


This one as pretty damn good from Amain

http://www.amainhobbies.com/product_...-30V-40A-1000W


Cheers

frankiebonez

iTrader: (8)

I'm looking at the modified computer supplys right now crusey. I found a user that I think builds them. I'm going to either buy one or build one myself, and build a case out of something and install the supply and mount the PL6 with the balance board and just have one big charger haha. Pretty excited about this, now to start ordering up the batteries

REVOJohn

yes the MP board now runs JST XH which is the most comon connector availabe....Hking, Venom, TPower etc etc etc. We think 90% of yu guys are running this and even REVOLECTRIX packs when bought online have this option for selection too

Tombsy

Another vote for the PL6, I just picked one up before Christmas along with a 24v power supply from Maxamps. It all fits nicely into a Rubbermaid toolbox.
If you Google "portable charging stations" there are some nice setups the heli guys have made.

REVOJohn

[QUOTE=Tombsy;10145204]Another vote for the PL6, I just picked one up before Christmas along with a 24v power supply from Maxamps. It all fits nicely into a Rubbermaid toolbox.
If you Google "portable charging stations" there are some nice setups the heli guys have made.


very nie set-up brian....i like the safety cable holds on the left.
Nice touch

frankiebonez

iTrader: (8)

Thanks a bunch for the info Tombsy!

PL6 is on order, waiting impatiently haha!

frankiebonez

iTrader: (8)

I have a new question. How does a 24v vs. 12v power supply relate to charge rates and is it even usable in certain situations? I look at the mathetical equations and see no reason why I would need a 24v PSU.

So how does voltage effect the equipment and charging capabilities?

crusey_aus

iTrader: (3)

Some chargers require a higher input voltage to get maximum output

If you supply them with a lower voltage their output will be limited

The manufacturer (spec sheets) will tell you what voltage and current is required for full rated output

My charger for example (Icharger 206b)

12v input = 220 watt output
15v input = 280 watt output


Cheers

frankiebonez

iTrader: (8)

Looks like I'm going to go with the maxamps power supply. Torn with either the 12v or the 24v. I'm thinking the 12v will probably be more than enough for my needs... but the 24v is screaming my name haha!

Charging 6 batteries at the same in like 20 minutes just gets me excited, is there something wrong with me? hahaha!