How to Wake a Sleeping LiFePO4 Battery 🔋 Charge a Fully Depleted Lithium Iron Phosphate Battery
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- เผยแพร่เมื่อ 30 ก.ย. 2024
- 🔋 How to Reactivate a Completely Dead Lithium Iron Phosphate Battery | Troubleshooting Guide 🔋
Are you having trouble with your lithium iron phosphate battery? A common call our support techs get is about activating sleeping LiFePO4 batteries that won't take a charge. In this video, we'll address this issue that some customers run into when they receive their batteries, install them, and mistakenly treat them like lead acid batteries. We'll guide you through the process of reactivating a completely dead battery and explain why it's not the battery's fault, but rather a charger-related problem.
The problem is some chargers and inverters, like the AIMS 75A charger, won't turn on until they see voltage on their input terminals. However, the battery won't wake up to provide power out until it receives a charge. It's a catch 22 when you have a deeply discharged battery! Learn how you can fix the issue in this video!
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FANTASTIC! I just woke up a 48v charger (and the battery pack) for my RV by putting 42v across the terminals using a Segway scooter charger. The battery read 32v - dead. Wonderful! Thanks a bunch! Even the battery manufacturer doesn't know this trick.
Your video is so helpful. I thought I fried my Lifepo4 battery but after watching your tips I was able to save my battery. Thanks a lot!!
thanks for this video! I accidentally drained my brand new Weize 100ah. I plugged in my camper and after 12 hours the battery was only producing 11V. I thought I destroyed my new battery. I just watched this and used the battery that came with my camper to "jump" and wake up my lithium and now it's charging at 13v 35amps. Hopefully in a few hours it will be fully charged but I think I'm on the right track.
I was following advice to condition a new LiFePO4 battery by charging it to 100% and then discharging it completely. My heart stopped for a moment when my charger wouldn't do anything, and my multimeter showed it barely had voltage. I knew the BMS was doing its job and cutting off the cells at low voltage, but this video reminded me of an old reviving trick. I never would have thought of this trick as an easy way to fool a charger and get things going again.
Thank you ! I just tried this and I think its working now !
50 amp max on that SOK battery may be a problem.
My Out Back flexmax 80 puts more than that out!!
And I happen to run 2 of them in parallel on one system.
Thank you that did the trick.
Thanks, straight out info... no frills.... understandable for novice. Thank you. Subbed and liked.
Thats why i didnt buy that particular AIMS power supply for my 24v batteries and went with a couple of victrons instead. I was afraid I might get into in some kind of emergency situation and not be able to charge a dead battery. Thankfully guys like you and Will Prowse are around to save people headaches. :) Liked and subscribed.
Thank you so much! Yes, it's a common issue with the Aims and portable chargers like the "smart" portable car battery chargers...Too "Smart" for their own good.
Very helpful, thank you! Now if SOK and these other companies could include this info when they package the batteries 😒
They do!
The Key is the BMS has cutoff the discharge of the battery. It will not reactivate until some current goes back into the battery. It's not the cells themselves but the BMS.
Exactly!
The user discharged the battery to the lowest limit of 2.5V or less and as Jason explained the , the MOSFET switched off the battery (cells) before the damage could take place. Victron IP67 would recharge the dead battery without external Exciter procedure, as the presenter narrated. FYI the battery in question uses smart JBD BMS.
Thanks for reading. 73s…
@@sreekumarUSA hi, can connect? I have some specific queries
Oddly, the video indeed omitted the actual reason being that the BMS low voltage protection cuts off. I have mine connected with my engine start battery via a 30A switch on the dash (helps the SOK start the fridge). Had to use it once when during storage I left the solar charger on (in sleep mode but drained the SOK 206Ah nevertheless).
@judgedredd8876 you went on to now explain the reason though
Hi. My battery died last night after more than a week of nothing but rain and this helped me out. Thanks man. I used a drill battery to jumpstart everything lol.
Great explanation!
Thank you!!!
This method (with 12.8v battery as the "pusher") worked for me. My 7.2Ah Miady LifePO4 battery was drained to practically zero volts (0.08v). Thanks for the tip! If you are out in the field or have no other voltage source than a solar panel, you can - briefly - hook up the solar panel directly to the "dead" battery to jump start the BMS. I tried it too. It works. Nothing got fried.
With all the technical talk I really wish you could’ve slowed down and actually explained how to do a charge with another battery.
Good point. Basically if you have another charged 12 volt battery you connect it to the dead battery so that current is running through it so the charger sees 12ish volts and the lithium battery will wake up.
I had this problem, I went ba v k through all the paperwork that came with the battery, couldn't find any information, tried returning the battery, I was outside of the return dates so I immediately blamed the battery, left a nasty comment on the site I bought it from & accepted the fact I had been ripped off. I almost threw the battery away but thought I should check YT & see if anyone else had this problem. Turns out tons of people have. Why won't these manufactures just provide a few lines of text in the handful of paperwork they send with the battery. At first I thought I was the stupid one but I've since changed my mind. It's not my fault I was not informed. So that leaves the manufacture & the seller to blame. They're litterally the stupid people because they either know, or since they're selling the product they should know everything about it.
To help those without jumpers or extra battery. You can actually use a standard 9v household battery to wake it up. Just connect your battery tender or charger then use a 9v to wake it up.
how?
@@s1dew1nd3r4he means wake up the charger shown in the vid. To wake up a sleeping 12v lithium battery, you need to apply more than 9v to it. Most of them need to see more than 12v input.
There's many possible sources for this. Wiring 2x9v batteries in series will give you 18v and that will wake up the lithium bms.
I used an old laptop charger, which was 18v DC, but you'll need to know which wire is positive and which is negative. A PC power supply (12v DC) or wifi router power adapter (12v DC) would work too.
Good points
Hi, Great informantion, thanks.
can i Wake Up a Sleeping LiFePO4 24V Battery BMS with one 12v lead acid deep cycle battery?
I woke my 24 V Lipo by using 2 12 V batteries in a series configuration. Within two seconds I heard a click from somewhere and my Lipo battery would take a charge after that.
You can still get old-school battery chargers; manual battery chargers that have a switch on them to change between 6-12-24 . the "smart" chargers I've always found to do a poor job in sensing and are too tempermental from a safety standpoint.
In saying that. You can use a smart charger, just have to enable the bms by jump starting the battery so to speak with anything over 12v and a light bulb
I just experienced a 100ah SOK that is new, wouldn't charge as received and the cell voltage was so low the only way to make it work was to remove the bms and charge the cells directly, now it is charging fine. Big question is are the cells damaged by the low state of charge I received them in and why was it so low.
Our system was just installed and I ran it dead not knowing. Everything is off. So basically what you’re saying is, I can jump my two lithium batteries with one car battery? And once everything turns back on I just let it charge up with the solar panels?
So dumb. I've done about everything I can, besides buy a victron or that charger, to wake these back up over winter. What does this 'feature' offer to anyone?
Most chargers "need" to see a voltage to start charging.
No voltage = no charging
Trying this but brand new battery won't wake up or its faulty I guess ,in fact I can even find it on the Bluetooth
Great information to know. The two batteries you sent me arrived already turned on so I never had to experience the issue. And if it would’ve happened to me in the field I would’ve been stumped.
It's been a common question/confusion, and we know our tech support line would have far less traffic after this video :)
can you connect a lead acid 12v to a Lipo 12v to get enough charge to recharge?
Yes that’ll work. I’ve done it before and it’s like a miracle.
I fix friends dewalt batteries this way. Its the same exact problem, charger wont see it. Easyspeazy. Great video!
Excellent video no front end PC and lead up just straight to the point wish more videos were just like this
Glad you liked it!
I get the idea behind this, but it is annoying to have to do. There should be some sort of reset button on the battery instead.
If there were a reset, the situation would not be cleared because the cells would still be over-discharged and not safe to turn on until they get some charge current into them.
@@CurrentConnected yes but I would think if your set it up so that by pressing a button it fed voltage to a charger the charger would then turn on so it could charge.
@@jasoncar1469 Yes it should be, common sense at least if the BMS switched it off, I do believe there are now a few companies that incorporate this wake-me-up button.
I have a car battery charger that does the same thing. What a great thing to know!
Dont forget to include that just like a 12v charger can wake up and 12v lithium battery. A 48v battery charger will be needed to wake up a 48v lithium battery. A 12 v charger cannot wake up a 48v lithium battery.
Great point. I connected (2) 12v agm batteries in series to create the 24v needed to wake up the bms in my 24v lifepo4 system using jumper cables. I clamped onto a resistor which i then touched to the positive post on the lifepo4's and it offset any spark.
Great explanation and demonstration. I am dealing with same situation where one of my two Renogy 100Ah 12V Smart Lithium batteries won't wake up.
Hi Sir, I have a 200ah Battery that has to stop holding up Charge and I don't know what to do, I have another 100ah Battery by the side, can I use the 100ah to wake the 200ah up, and how should I do it Sir?
Thanks you. I am installing a 24 V battery in my travel van. And a volt meter! Important information should my battery go to zero.
How can I buy an Amazon returned battery?
I may need your help later on I’m going to try to build a small home solar set up/system I just ordered the 100/50 smart Victron MPPT charge controller and I have been buying up Renorgy nine busbar per 100 W 12 V panels as returns from Amazon to save money right now I have four of those panels and three older Renorgy 100 W panels i’ll probably create a small set up with the three older panels in a separate set up and keep the newer panels all together by themselves and their own system. I’m looking at power queen or Redodo batteries any thoughts on them???Am I moving in the right direction here or no???
What if they don't wake up? My lithium pro wont jump and wake up.
these auto-(voltage seeking) chargers *suck*...big time
it's time for them to remedy this bull crap, put a damn button on it to activate, or any other way,but stop this BS of dead battery AND dead charger!!
one buys a charger THAT DOES NOT CHARGE when we need it THE MOST ??!!
who'd have thought of THAT!!! ººXºº
This should be a sticky note on the freaking nose of every single engineer at every single battery and charger manufacturer, and shouldn't be allowed to be sold any other way as a whole unit.
Seriously..if it's sold as parts, or a component of a build kit, or anything along those lines - fine, but not as ANY sort of plug and play type item.
No battery should be able to run itself into a dysfunctional state, and no charger should be sold that can't charge a dead or low battery. How this surpassed no brainer stage is beyond me.
The very fact that this is even a topic of discussion is a joke IMO.
I heard you say that was a 75amp charger. Is that okay to use on the SOK 100ah battery? I realize this was just a learning video, but your website lists the recommended charge to be under 20a and the max to be 50a. It would be great to hear I could add a little more beef to my charger down the road once I improve my cabling further.
The charger can do 75a, but it has an adjustment knob so it can be turned down to 20a. You can set it to whatever setpoint you want.
@@CurrentConnected Good to know - thanks for the details.
So if you had two batteries and one was shut off, could you connect them together and the one would turn the other on? Sort of like if you were balancing them?
Yes, exactly. The BMS of the dead battery would see the charge current and turn on, and if not, the charger would see voltage present on its terminals, turn on / start charging, which would then push the power through the BMS which would re-activate it.
@@CurrentConnected Thanks!!!
Go figure. I have an entire garage full of tools I have acquired over the last ten years but the one thing I don't have is jumper cables, but what I do have which works just as good is a Power Probe. Hooked it up to a secondary battery. Applied current for about 2 minutes, just enough time to power up the BMS and now the charger is taking over for the lithium battery on my Camaro. I had a feeling mine got fully drained by an accidental parasitic draw I had going over an entire day, just wasnt sure how to go about re- activating the BMS. Excellent video and thank you for the info!
Great video, thanx!. A question, to wake a LiFeP04 24V lithium battery, can I still use start battery of 11-14.6V or I need a battery closer to 24V?
Walker Nancy Lopez Scott Clark Charles
Could you wake it with the lead acid battery that is being replaced?
2:40 I think he mentioned something about that working in a pinch.
thank you, thank you, THANK YOU....for the info AND for NOT making this MOSTLY ABOUT YOUR FACE.....like so many, many others...um...yeah...thanks for that...for reals
Although I understand the premise of this approach it seems dangerous. If the BMS cut off the battery isn’t is safe to assume the cells are at a low enough voltage that it would be unsafe to recharge them? For example, I had a LiFePo battery in a small UPS that carried a the correct rated load for the battery until it ran out if capacity. After power came back on that UPS was unable to recharge the battery. I checked with a multimeter and it claimed it was over 900v so i quickly disconnected the leads. A few seconds later i tried again and it read like 2v and drops rapidly. I left to battery in the shelf for a little over a month at this point.
It worked for my battery! not sure why it read 900v when I first metered the battery but after trying this my 12v 7ah Power Queen battery is back from the dead.
And to somewhat answer my own question. The battery read 12.8v after being woken back up, I am confident that voltage wasnt brought higher through by process because the battery i connected it to was around 11v.
Will a Victron Multiplus 3000VA 120 12v try to charge an LFP battery showing no voltage like the other Victron chargers you linked to?
Will this trick work to restart the BMS in my Hysolis 48V power station (BPS3K)?
Thanks buddy! Just saved my water lines from freezing!
Wonderful video! Just what I needed to get my battery going.
So I received bluetooth 100ah battery from renogy 2 days ago and for the life of me cannot get it to activate its 100% new from the box. This method also did not work. Also tried renogy rover charge controller. Battery reads 6.83 volts across terminals. It wont charge it wont discharge it wont bluetooth. Renogy customer service dog crap.
My battery did come charged but it literally only last a 1-2 seconds now it has no current but still reads 12v? I don't know what happened.
Do all LiFePO4 batteries ship like this? Check it, no volts and then put a tickle charger on it until I see volts and then should be good to go?
Any ideas on how to do this easily "in the field" for batteries wired in 24v? Dual alternator wont start charging without sensing voltage. Batteries go to sleep after discharging completely in the night... MPPT can work, but looking of a go to solution to "wake them up" so the alternator can take over...
I've got a 280AH SOK. Worked great, then got on the road and it shut down. Turned out the balance PCB on the top delaminated and the B- terminal came off the board. I've repaired the board (currently waiting for Min to send me a new board). The cell voltages show 3.45, 3.47, 3.45, 3.47, but the bluetooth is not functioning and it wont take a charge.
Without a charger connected, I see 11.61V at the terminals. This seems to be a very high impedance source, as it provides no current. Only open circuit voltage. I attach my WFCO charger to it and place 13.71V on the terminals, but it does not seem to be accepting charge, and the bluetooth still does not turn on.
Any suggestions?
So my battery showed up dead. I haven't even connected it to anything but the charger today and it was all the way dead. Bluetooth in the battery running all the time? Why would the BMS not prevent the Bluetooth from discharging the battery that nothing? Am I going to run in to this every time I pull the camper out where it's dead if it sits for a few weeks?
What if you have a 48V battery with the setup you have. Anyone just happen to have a 48V power supply lying around? probably not.
As a dry-camper with solar panels, this is very annoying when returning to camp to find that the battery shut itself off. Basically, Im unable to rely on the 12 volt fridge to run consistently. Looking for ideas.
HOWdy C-C, ...
THANKS
G@@D Information
COOP
the WiSeNhEiMeR from Richmond, INDIANA
...
Jackson Ronald Lopez Ruth Rodriguez Shirley
My battery 48v 30ah lfp battery charged 100%, (charged from 85% to 100%) after riding 45 minutes gap , but after that fully charged vehicle couldn't on , when i put on triper , i couldn't on sound /and vehicle on ,
What should i do sir.
Give the solution please, thanks.
All you need is a second 12 v battery and hook it up in parallel or a rv converter charger like my iota 75 amp DLS iq4 model
Williams John Davis Jeffrey Taylor Robert
BMS did it's job and protected the battery
Great video. I have a slightly different problem. I have 3 12V LIFEPO4 batteries in series to run a 36V golf cart. The cart has been dieing after a short period of use. I find that one of the batteries has a negative 8 to 9V on it and the other 2 are fine at around 13.5V. I have to put a 12V trickle charger on the negative reading battery to bring its voltage up so that my onboard charger will take over like you described. My question is: why does one of the batteries draw down to a negative voltage in the first place. It's not always the same battery either. I tried the balancing method of fully charging and then connecting them in parallel overnight but I still end up having the same issue. Any help would be greatly appreciated.
How to revive an SOK Bluetooth Lithium Battery and bypass BMS
The BlueTooth has discharged the battery and you can't charge it.
Open the battery and charge the cells directly for about 10 minutes - after try charging from the top through the BMS. If it doesn't work, recharge all the cells bypassing the BMS to nearly 100% capacity. If the BMS still won't work:
Disconnect all power from BMS, let it sit overnight, make sure you charged the cells without the BMS to about 80% - reconnect the BMS, start charging normally through the BMS on top of battery.
Some lithiums require 14.6volts to wake them back up..Just jumpwith another lithium doesn't always work.
I just ran some off breed lithium battery to 0.433 mV
I hope this works
Dang, that is exactly what i did to my 36 volt ebike battery, i hooked up a good battery in parallel with it (exact same model) battery, then plugged in the charger after a few minutes. I got bubkis.
Okay, if im in my boat, i have my lithium battery for electronics, lead acid battery for cranking. If i use the "jumper cable" method from lead acid to lithuim, do i need to actually need to turn the key? Do i need to start the boat?
You're awesome. Great video. Thank you.
Great thanks, own a Victron 15 amp blue smart charger already so perfect.
Hello , I'm actually having a problem 51 v lithium Ion battery that I've purchased from china , the battery is waking up but I am having 0 volts at the end of the terminal when measuring of the battery . Can I do the same process with 48 v solar panels to wake the battery up . Thank you
how do you ever know if you actually started at your battery's maximum? Did your charger quit after it hit 78%? Some other %? Do have to go to dead, use a shunt and then measure how much goes in? Then compare that to the rating on the battery?
Wilson Gary Jackson Angela Martin Brenda
What about Renogy 12v100ah smart lith.ion battery… I plugged in a noco 5am 12 volt charger and doesn’t seem to take a charge
What do I do on my boat to bootstrap the battery? No AC, no DC without my SOK batteries?
Hi! I have a 51.2v battery dead and have another working on 48v. Can I boost the dead 51.2v with the 48v?
Hall Elizabeth Thomas Elizabeth Brown Lisa
Can I use this trick to restart the BMS on a 48V battery bank?
My new charger has a wakeup mode where it puts out a selectable voltage for 5 minutes before sensing for recharge
This was the video that I needed! I was unable to get my Victron Inverter Charger back online after a winter of having my LiFePo4 batteries disconnected. Once I woke up my batteries and put a charge on them my inverter came back on,
I use the lab power supply to charge my lithium motorcycle battery completely.
Works great.
I wonder whether it is safe to recharge LiFePo batteries once they are completely discharged (like in the video to almost 0 V)?
Garcia Timothy Gonzalez Sharon Wilson Laura
make sure its 12v you wake it up with and not the feed from the PV at a much higher voltage... lost a radio on that mistake...
Would this still apply if the battery is showing proper volts on a multi meter but not power up the electronics
I don't have another lithium battery to jump my dead one with, is it safe to jump it with a standard lead acid battery to wake it?
Martinez Angela Williams Kenneth Moore Scott
What if you
Have 4 batteries in series. Then the positive end on one side and the negative end on the other. My VictronConnect multiplies cannot charge the batteries one at a time or it will dry the single battery!
Bet they resold that battery as new
I have a tiny 1 amp 24 volt power supply. I will keep it with me in case this happens. Thanks!
So can i hook up 2 chargers to the battery to make it take a charge so my main charger can start charging it?
Does it matter what type of battery I use to piggy back too? Lead acid?
Name of the power supply please I just wanna get one for myself please?
Good video. Ive got it hooked up and the battery is still not "waking up" is it possible the BMS in the pack is configured differently?
Update: my battery had a damaged BMS, Had a gouge that crossed several traces including one of the primary leads from the cells. It was apparently done before the battery was assembled, probably during assembly of the bms board. I was able to repair the BMS and now have a functional battery. The store also sent me a replacement battery as well so I've got two ✌️
Thank you great stuff I'm not sure if it was you on the other video but you really helped me get my aims charger going. Thanks a mill
please, dose this apply to lithium battery as well.
thank you
I used an old "dumb" Harbor Freight engine starter set to the 55A mode to wake up one for a friend. 10A charging mode wasn't enough to wake it up.
Why did the BMS stop the discharge at 10.5 volt??
The BMS stops discharge at around 9.4v. The customer in this case was using DC loads which were capable of loading the battery all the way down until complete discharge, so no matter where the discharge cutoff in the BMS is set, it would be triggered and this issue would happen regardless.