belewis01

iTrader: (5)

Sorry - got it backwards ( it was late )

100W / 1 ohm x 5

Make more sense now?

biz77

iTrader: (47)

Resistance (Ohms)=battery voltage/desired discharge current

Power dissipation required=Battery voltage x desired current

For a 2s lipo 40-amp discharge:
R=8.4v / 40 amps = .21 ohms
P=8.4V x 40 amps = 336 watts

You would want a resistor or resistor bank totaling .21ohms and at least 336 watts. 5x 1-ohm, 100-watt resistors gets you pretty darn close to that.

anthonyscardina

iTrader: (12)

awesome, I'd done the math before and it seemed close at 4x 1 ohm 100 watt, wanted to be sure. thanks for the info!

1shnot

iTrader: (2)

With Discharging bank... 30amp is the most we can use on 308 right?

disaster999

iTrader: (1)

for single channel yes, but if you put into synchronous mode, you can discharge at 50 amps

theproffesor

iTrader: (66)

Need some help

I want to use the cycle mode to discharge my battery then recharge it for my next race. (Touring car running 2s). I have a 30amp resistance discharged attached to it. When I charge the battery (at 30amps) it works great, when I discharge (at 30amps) it works great. When I set it up to run cycle mode, 1 cycle, discharge then charge, it will not work. I plug battery in, select the cycle function, hit start, the I get an error message saying the other channel is occupied. It's not, it only has the discharged hooked up. It does this no matter which channel the I am using to charge or discharge. My race day can be short sometimes and I forget if discharged a battery and forget to charge it before a race.

Thanks in advance,

Bronson

theproffesor

iTrader: (66)

Got it. Needed a firmware update

Still Bill

iTrader: (16)

So, what is your current version number for that update?

Thanks.

Bill

christopher_2

iTrader: (2)

I hook my icharger up to a 12 volt 55 Amp Hour deep cycle battery for a power source. Keeping it about half charged you can dump two batteries at 30 amps no problem back into the deep cycle battery. When the deep cycle battery gets close to full, I use it to charge a couple of batteries. If it needs charged up just hook the icharger up to your power supply and charge it up.

roffutt

iTrader: (13)

Bruce, sounds awesome.. Could you provide more information on the bi-metal temp control switch you used and how to set it up?

Thanks,
Robbie

roffutt

iTrader: (13)

Anyone else using long charge lead cables with their 308 or 406 chargers? I bought 2 of the TQ wire 2ft leads... I used them for the first time this weekend.

So, I noticed when either cable is connected with out a battery connected, I see a voltage (usually around 1.5v) displayed on cell 1 of the balance port screen. I thought it was odd.. but didn't think to much about it.. once a 2s pack was connected the voltages were fine. I noticed without any pack connected, the chargers internal temp rises till the charger fans start blowing.. The internal temps hovers around 107.. As soon as I pull the balance plug, the temp drops. I checked a buddy's 406 who uses simliar Trinity cables.. same thing. He's had his setup this way for a long time with no issues, but this concerns me if I will shorten the life expectancy of the charger over time? Anyone else notice this or possibly a known issue?

anthonyscardina

iTrader: (12)

I use 3 foot 2s leads that I made myself and also see the random voltage, but haven't ever noticed anything heating up. your balance plugs are in the balance port and not the temp probe port? stupid question but I gotta ask lol

disaster999

iTrader: (1)

It's normal to see weird voltage readings when plugging in the charge leads without a battery, but I too have no problem with the charger over heating when plugging in custom cables for an extended period of time.

roffutt

iTrader: (13)

Yeah.. I know they are plugged into the correct port.. like I mentioned they work fine when a battery is connected. Even if it's just idle with the pack connected, no issue. Just when no pack connected with all of the wires, I see a funky voltage... and see the internal temp rise on the charger.

Next time you have a chance.. try plugging in just the cable and monitor the internal temp.. let me know if it rises till the internal fans kick in to keep it cool. And then disconnect the balance plug and see if the temp drops.. for me it dropped immediately.

I'm guessing it has something to do with the extra resistance of longer balance lead wires.

Thanks for you responses.

anthonyscardina

iTrader: (12)

I'll turn mine on tonight and let you know. the balance leads on mine are connected right where the bullets go into the charger, the only long one is the 1mm which I think I used 16ga.