Long term lipo storage

[kacordy]

Harry, the boats you have seen are a 2002, 20 foot 2 inches long, 850-900 pounds. Mine is a 2003, 20 foot 3 inches and 950 to 1000 pounds. The cowlings on the 2002 are for aero dynamics. The 2002 Allison holds the world bass boat kilo record at 118mph. The 2003 is bigger and a much bigger fishing platform. The 2003 is rated for 90 to 150 HP. With a 150 they will outrun every production boat on the lake. With the 280 they turn into rockets. The acceleration from 60 to 100 is amazing. I love the 280 because I can cruise at 80mph and its just loafing along at 6300. WOT is 7750 and its screamin. I fish with a modified Merc 26 trophy, low 90's. Light load with 28 ET it breaks 100 and then it does not have enough power to push it through the air. It's quite a boat ride. Thanks for allowing to share my biggest passion. My dad raced for OMC and I raced from 1978 to 1990. 125 shifters during the 90's. Allison 97 to present. Now it's FE TIME.

[lenny]

So I guess that toy is a BMF !
How did you make out with the read on the info links ?
Lots of stuff in there.

[kacordy]

I'm still reading !! LOL

[785boats]

Cool place and 3.85 ??? According to My Hyperion charger, this is full charge and it ends. What is a full Charge then ???

Allen

Allen.
Could you clarify this please.
Are you saying that your charger shuts off at 3.85V per cell and says that the pack is fully charged?
If so, you are either not setting the charge mode up properly or you have a problem with the charger.
They should charge up to 4.18V - 4.2Vper cell.
Cheers.
Paul.

[kacordy]

Paul, Thanks for speaking up. I will check tonight and verify. I have never seen 4 Volts on this charger. It goes to 3.8 and then ends. I've used it for 3 years with cars that way. New to the boats. I will verify and post my results.

Allen

[lenny]

785boats,
Nice call with all the BS going on.

[Old Sloppy]

Lipo Charge Voltage Readings.jpg

your charger shuts off at 3.85V per cell and says that the pack is fully charged?
Paul.

3.85v is 50% charge.
I have attempted to attach a charge chart, not sure if I did it right or not.
got to click on it to make it large enough to read.....

Harry

[785boats]

Thanks Harry.
That's why I wanted Allen to clarify. To make sure that I read the post correctly. Because the packs are only getting half charged & I think the problem should be sorted out before it becomes a big problem.

Allen.
You must be getting very short run times with only half charged packs each time you go out.
It seems that you might be set up on 'Storage Mode' instead of 'Balance Charge'.
What type of charger is it. Brand & model number would help. Or even a link.
Also battery type, size (mah) & C rating.
Can you measure the cell voltages with a multi meter or voltage tester after the charge? Just to see if they're the same as the numbers on the display of the charger.
I'm sure someone on these boards will be able to diagnose the problem if it's not a charger that I'm familiar with.

Apologies to roadrashracing if this is considered hijacking, but it is sort of related to storage voltages.

Cheers.
Paul.

[kacordy]

Paul, I have a Hyperion EOSO606i ac/dc charger. The battery I'm running is a Hyperion 2s/7.4 45c. 5000mah and they are new. I run them in series for 4s. They Charge to 8.32 and it ends. I have ran them for a couple minutes and when I plug them in they are at about 7.63 or so. I have never discharged a battery to store. I have always fully charged to end and then put them in a lipo bag for storage. Just got a steel box for storage. I'm considering storing them outside the house in a full size refrigerator in my outdoor kitchen by the pond. The more I read I don't want them in the house. My Beer refrigerator is just above freezing. Is that to Cold? FYI, I just posted my first you tube video,
" p-spec hydro at Cordy's pond " I will post more.
Allen

[785boats]

That seems to confuse things a bit more Allen.

In posts #6, & #20 you state that your charger ends the charge at 3.85V per cell. And that you have not seen 4 Volts per cell at the end of the charge

But in your last post (#24) you state that they charge to 8.32V for the 2s pack. That's approx 4.16V per cell.

Your charger can tell you the complete pack voltage & the voltage per cell.

Can you clarify any more? I don't understand what is happening here.

But at least now you know to store your batteries at 3.85V per cell (about 7.70V for a 2s pack) @ not fully charged like you have been doing.
Cheers.
Paul.

[IRON-PAWW]

Just going back to an earlier comment about putting the LiPo's in the fridge. Some say yes, some say no - it damages the batteries. I have been told by the guys at my local hobby store that putting LiPo's in the fridge is a real no no. Something about chemicals crystallsing......... Or something. What say all of you?

[ray schrauwen]

I'm only guessing but, temp and humidity would be factors.

[srislash]

Well,I was talking to a Millwaukie Rep (work tools) and he was claiming the cordless lipo tools work fine on the rigs in - whatever it is up there. Sooo,might depend on chemical makeup but.... Just sayin'