Recovery of deep discharged Lithium Ion cells safely on the workbench

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Publicado 2021-08-30

A quick video about how I recover deep discharged Lithium Ion cells (could be applied to LiNMCO, lithium manganese cobalt oxide or LIFEPO4 type chemistry). Many times these cells are recovered from 0v by dumping current into them. This is not a good idea. Using some very basic bench equipment, I demonstrate a dead cell being revived with care and caution - it's the only correct way :)

A plethora of new videos are on the way, but it will take a while to get there. Please note due to eye problems I cannot reply to comments reliably. Sorry about that :\

#lithiumbattery #workbench #electronics #lithiumionbattery #lithium_ion_battery #safety #safetyfirst

Todos los comentarios (10)

@errolfoster1101 hace 5 días

Another thing to be careful with some cells come with a battery management system built in and some do not relying on the management built into the device which is something beware of because if you leave one with out it built in it will keep charging till it explodes
@lusher00 hace 1 año

Thanks. I had an over discharged cell and I own a nice power supply. The EE degree helps too but you’re right, you can learn anything on the internet. You don’t need a degree, just a skill. An EE degree definitely pays for itself though. A good (not to say expensive) educator will provide access to all sorts of expensive tools and people to show you how to use them.
@llamudos9809 hace 2 años

Get it to 2.25v on .1 amp just keep checking temp using hand at 2.3v i usually use 0.5 amps to get up to 4.15 (keep checking the the temp on the cell) I then leave it charge for a week and see if it holds its charge. If it does its fine. If its dropped below 3.7v its bad.
@EduardRitok hace 1 año

i scavenged a li-po battery from a disposed vape, it is 2500mAh cell .. it had literally 0V .. i gave it a chance and charged it slowly, i applied around 50mA current, but the voltage was climbing extremely slow ... that could mean only two things, either it has internal short circuit, or it had still a good capacity and preserved it's low internal resistance ... i waited couple tens of minutes until the cell climbed to 1,5V, then i increased the current to 100mA .. as soon as it climbed to 2,5v i rose the current again to 250mA(i was little impatient) .. then waited until it gets to 3v ..I noticed the cell getting slightly warm, but nothing concerning.. then i unplugged the charger for half an hour and checked the voltage if it stays or drops ... it was stable ... and then since it had 3V i left it charging with 1A to 3,8V and left it disconnected overnight .. it holds the voltage and it had very little V drop under load ... probably only 0,01 or 0,02V when connected to 5w light . looks good to me
@wtfvids3472 hace 4 meses

a constant voltage charger... does this just mean that it turns off when it reaches a certain voltage? so i could just use a "higher than the cell max voltage"-charger and cut the connection when it reaches a certain voltage? or is there more to it...
@ExilesGate hace 2 años

Great video man...I was wondering what is the brand & model of the bench charger your using?
@1dyrfullymade hace 3 meses

I have an off brand power station that will only charge by a 12v car charger and not a wall charger. Why is this?
@shanejohns7901 hace 2 años

'The brand is probably just generic' Brand means absolutely NOTHING. The actual factory in which it was made tells one significantly more when you combine it with the weight of the cell.
@ankitrajkaushal-ct1mq hace 1 año

I have a dual set of 18650 totalling to 3000mah, my tp4056 does not charge it and shows blue light when connected. They are at 0.66v. I tried to jump up the voltage for 10-20 secs but the voltage quickly drops to the same when disconnected. What does this tell u. I am curious because I have seen people recovering their 18650s with even lower voltage than mine.