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Old 09-08-2016, 12:00 PM   #1
Colin Broughton
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Found a discharger that works!


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I've always wanted a proper dedicated lipo discharger and stumbled across this one. Found it threw Facebook and the reviews and videos sounded like it was exactly what I was looking for. So I pre ordered one (2nd batch) and it showed up a few days ago.

Well today I went flying and my time got cut short, so I returned home with 4 fully charged 6s 1800ma packs. I threw all 4 on the discharger in parallel and they were safely discharged to 3.85v in less than 20 min :wow2:

I'm not a rep or affiliated with this company, I just think alot of you guys will appreciate this post and will be interested in looking into this product.

http://www.perfectregulators.com/Uni...Discharger-Pro











Universal Lipo Discharger Pro - Introduction - YouTube

Universal Lipo Discharger Pro - Operation and Timed Discharge - YouTube

Info from the website :

No more using your charger to discharge un-used Lipo Packs to Storage Voltage. The Universal Lipo Discharger Pro is a stand alone, self contained Lipo Battery Discharger that will run automatically to ensure a proper and safe discharge.

The Universal Lipo Discharger Pro has an input range of 2s - 7s Lipo Batteries, dual status LED's, dual Cooling Fans, large Heat Sink and most importantly automatically shuts off when storage voltage is reached. The Micro-Controller constantly monitors cell voltage to ensure that as soon as the set storage voltage is reached, that the discharge cycle is automatically stopped to prevent damage to the battery.

Operation is extremely simple and there is nothing to press or a switch to operate. Simply connect the main battery leads, then connect the balance adapter. As soon as the balance adapter is connected, the Universal Lipo Discharger takes control. The dual LED status indicator will show when the battery is discharging by illuminating the red LED. While in discharge mode, the dual cooling fans will automatically start and run during the discharge cycle. When the storage voltage is reached, the discharge cycle is automatically shut off, the green LED will illuminate (and if connected, the Audible Alert will sound) to indicate the discharge cycle is complete. The fans will continue to run after the discharge cycle has completed to allow for quicker cool down of the unit. Simply disconnect the battery and connect the next one.

If a battery is accidentally left on the discharger for a prolonged period of time after the discharge cycle has completed, the unit will completely shut off when nominal cell voltage reaches appx. 3.75v. This added feature prevents over discharge of connected batteries.

Another feature is that the Universal Lipo Discharger Pro can discharge packs in parallel with the use of parallel adapters for the main battery power leads and balance leads.

Current is selected based on the cell count of the battery being connected, below is a cell count to current table as reference for max current discharge rate.

2s - (7.4v / 8.4v) 3.0 Amps Max
3s - (11.1v / 12.6v) 4.4 Amps Max
4s - (14.8v /16.8v) 5.8 Amps Max
5s - ( 18.5v / 21.0v) 7.2 Amps Max
6s - ( 22.2v / 25.2v) 8.6 Amps Max
7s - ( 25.9v / 29.4v)
10.0 Amps Max


Also included is an accessory port that allows the connection of an optional (purchased separately) audible alert that when connected, will sound a buzzer once the discharge cycle has completed.

Battery management will never be as easy with the Universal Lipo Discharger Pro!!!
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Old 09-08-2016, 12:27 PM   #2
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Re: Found a discharger that works!

Up to now I have been using lightbulbs and a voltage alarm. It has always worked fine for me. It just meant I had to be in the same room when I was discharging

I like that gadget but its a bit pricey for a single purpose item..

Prior to this post I had an idea to arduino something a little more automated than my light bulbs and alarm method. An arduino module controlling a relay is what I had in mind. Only problem is Im not that arduino Savvy. Surely someone can cobble something together for arduino faster than I can and for a lot less than the 115USD those guys are selling that gadget for.
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Old 09-08-2016, 01:02 PM   #3
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Re: Found a discharger that works!

There are various Arduino based dischargers on the web and RCGroups. Or there is a commercial one available in 50W and 150W versions for $12.99US:

http://www.myrcmart.com/rcx-3in1-bat...ng-p-4766.html

http://www.rcgroups.com/forums/showp...&postcount=188

http://flitetest.com/articles/arduin...age-discharger

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Old 10-10-2016, 12:51 AM   #4
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Re: Found a discharger that works!

ya seen this the other month and thought it was pretty neat
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Old 10-10-2016, 10:22 AM   #5
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Re: Found a discharger that works!

Quote:
Originally Posted by Max View Post
Up to now I have been using lightbulbs and a voltage alarm. It has always worked fine for me. It just meant I had to be in the same room when I was discharging

I like that gadget but its a bit pricey for a single purpose item..

Prior to this post I had an idea to arduino something a little more automated than my light bulbs and alarm method. An arduino module controlling a relay is what I had in mind. Only problem is Im not that arduino Savvy. Surely someone can cobble something together for arduino faster than I can and for a lot less than the 115USD those guys are selling that gadget for.
Last July, while enroute to Ireland, I remembered I had left a lipo on my charger. I had been putting it into storage mode. It was in the basement on the washing machine in the laundry room next to my workroom. 2 days later it caught fire, fell into a basket of clothes, which lit the door to the workroom on fire, which lit the wall on fire and the floor joists were just starting to burn when a plastic water pipe burst and doused the fire. The water continued to flow for hours until our daughter happened to come by and found everything. The water probably did as much damage as the fire. Long story short, we are now, 3 months later, almost back to normal. Total cost was probably about $70,000. New furnace, appliances, most of my workroom tools, and on and on.
And except for my extraordinary good luck of a 3/4 inch plastic pipe bursting, I would have lost the entire house.

I ordered one of these last Tuesday, and it is now in Lewiston NY where I will pick it up tomorrow. I know $115. seems like a lot, and of course with shipping and the Canadian dollar and the GST I will have to pay, it will be more like $200. Let me say that if $200 means I do not have to worry about a house fire it is money well spent.
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Old 10-10-2016, 02:42 PM   #6
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Re: Found a discharger that works!

I'm curious about the need for this item? I suppose that if your charger doesn't discharge as well, it has its place, but for about the same price, or a bit more depending on model, you can purchase an iCharger, which does it all. My personal charging system includes an iCharger 3010 powered by a 1000 watt Meanwell power supply. Up to 30 amps charge ability, to a maximum individual batt cell count of 10. Auto charge, discharge, cycle, storage charge - all batt chemistries - and very accurate. It is actually more featured than I'm capable of absorbing, Lol.

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Old 10-10-2016, 02:45 PM   #7
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Re: Found a discharger that works!

Definitely cool setup. I'll have look into it
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Old 10-10-2016, 05:44 PM   #8
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Re: Found a discharger that works!

Quote:
Originally Posted by Midair View Post
I'm curious about the need for this item? I suppose that if your charger doesn't discharge as well, it has its place, but for about the same price, or a bit more depending on model, you can purchase an iCharger, which does it all. My personal charging system includes an iCharger 3010 powered by a 1000 watt Meanwell power supply. Up to 30 amps charge ability, to a maximum individual batt cell count of 10. Auto charge, discharge, cycle, storage charge - all batt chemistries - and very accurate. It is actually more featured than I'm capable of absorbing, Lol.

Peter
Hey Peter. I need one because my chargers, while having a high charge rate capability, have a very low discharge rate capability due to the small resistors that are on the circuit board. If you are happy to discharge at .5A, I suppose its not big deal. But discharging a 5A 6 cell to storage voltage takes forever. By using higher capability dischargers, they discharge faster.

FYI, I will do 4 6S 5000's at once using my lightbulb method, but you HAVE to have a voltage alarm to warn you when you get to 3.8V/cell so you can shut it down. That is why I am looking for an automated system that will shut itself down rather than me having to constantly monitor it.
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Last edited by Max; 10-10-2016 at 06:52 PM. Reason: typo
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Old 10-15-2016, 10:46 AM   #9
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Re: Found a discharger that works!

Hello Max:

What you say makes sense. My iCharger allows selectable discharge amperage to any value that I choose. If you're only discharging at .5 Amps, it could take quite a while to get all of your batts, particularly larger capacity, to storage charge. Unless I have suspect pack or, cell, I only discharge my LiPos once a year, larger capacity at the end of the outdoor season and smaller at the end of the indoor season, so the wait to discharge to storage voltage wouldn't really be a great concern for me.

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