Discharging a 52 volt battery pack

Talon

10 W
Joined
Jun 4, 2017
Messages
77
Location
SE Michigan
I have a brand new Luna 52 volt 13.5ah battery pack that I need to discharge down to about 45 volts for storage. The pack won't be used for another month or so until it temperatures warm up in the Spring time. I have a Luna mini charger that I used to charge the pack to 90% 4 weeks ago. I read and learned a lot about storing batteries since that time. My question is.... Can I just hook up the discharging battery terminals to a desk lamp with an 110 volt incandescent bulb as the load to safety discharge my pack down to a lower voltage for more storage? I did a search here and didn't find the answer that I was looking for. Thanks!
 
Re: my discharger DIY by psycholist
http://endless-sphere.com/forums/viewtopic.php?f=14&t=33637#p489415
psycholist said:
Easy lipo discharger:

Purchase a normal household 110v outlet.
Connect wattmeter between battery and screw terminals on outlet.
Plug power strip bar (4-6 outlets) into outlet.
Plug resistive load appliances (iron, quartz heater, griddle, frypan, floodlights etc.) into power strip.
Switch on appropriate # and combinations of appliances for desired amperage.

Use cellogs, battery medic, icharger (monitor mode) etc. for monitoring.

Re: Discharging LIPO help by Paladin
https://endless-sphere.com/forums/viewtopic.php?t=65982#p993640

LBD by Ypedal
http://ypedal.com/Lbd.htm

Lightbulb Discharger by xenodius
https://endless-sphere.com/forums/viewtopic.php?f=14&t=53903

Joined the light bulb club today. by StudEBiker
https://endless-sphere.com/forums/viewtopic.php?f=3&t=18797
 
An incandescent filament bulb will work. 40W is better than 100W, but either will work.

I recommend that you don't allow the pack to go below 3.3V per cell. 14S X 3.3V = 46V
 
spinningmagnets said:
An incandescent filament bulb will work. 40W is better than 100W, but either will work.

I recommend that you don't allow the pack to go below 3.3V per cell. 14S X 3.3V = 46V

3.30V is a good minimum to have, or 3.20V.

I store mine at 3.60-3.70V overnight, but havent needed to store a long time as I ride everyday.
 
no 45v storage

bms drains 24 7

52v 53v enough benefit

discharge using incandescent lamp or heater element

100% charge allow time for cell balance before discharge
 
I did dicharge my 10S ebike pack, my other 14S ebike pack and my 10S eskate pack.

For storage, I prefer to stay at 30-35% state of charge which is 3.63V per cells. Dont forget BMS sometimes drain parasitic current.

Discharge your 14S battery to a resting voltage of 50.8V. Buy for long term, anywhere from 50.8V 35% to 52.0V (50%).

I monitor voltage every 2-3 weeks for all my batteries. In 4 months tey did not move a single volt decimal after 4 months.
 
Dont go 45 or even 46 V. It,s too low. For storage, going below 3.5V is wherr you start ti be in a region of the discharge curve that rapidly drops. Not 3.4 or 3.3V, it onky takes a few tens of milliamps capacity draining and you can goa bellow 3.0V, where cells tan start to become damage
 
An incendescent bulb will work... But it might be slow... Good if your pack is only good for low current. If you want to go faster, use a hait dryer instead of a light bult...

How i did it and how fast: https://endless-sphere.com/forums/viewtopic.php?f=2&t=93576&hilit=Ancheer&start=75#p1429947
 
Back
Top