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.
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.
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.
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,
Very informative video. I'm aware this video was made a few years ago, however I hope this comment finds you. I accidentally discharged 2 48v 100Ah EG4 batteries to 52.44v and my 48v high frequency EG4 charger acts as yours in this video. My question is, will the adjustable Nice-Power supply also wake-up a 48v battery? Thank you
We would recommend the EG4 Chargeverter in this scenario. It is capable of "Dark Starting" a lithium battery. www.currentconnected.com/product/eg4-chargeverter-v2-48v-100a-battery-charger/
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.
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.
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!
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.
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???
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.
My new 206 Ah battery reads 10.6 V. SOK says I need to wake it before my 40A MPPT will recognize it. How depleted is 10.6V? Once it's charge to 11V might the controller power on? Can I then connect solar, or must I use the charger until battery terminals read 14V? Help! Great vids!
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.
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.
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…
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).
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.
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.
@@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.
You certainly did make me have a better day!!! Thank you so much for this wonderful information. I'm surprised AmpereTime, SOK and WFCO do not readily publish this information. This is basic NEED TO KNOW that every LiFePo4 battery owner needs. Again - thank you so much for saving my hunting trip!
I had "dead" lithium batteries in the caravan put the charger on nothing happened nothing I did would work, watched your vid decided to connect the car running and Anderson plug whammo everything started to light up and the charger started to do its job, thanks heaps
will the Victron Blue Smart 12V IP65 Battery Charger work as well and have it's own power supply to wake a dead LiFePO4 battery up like the two models you suggested?
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
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?
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.
I have a Rebel 24 Ah battery that has had little use. I run a small 14 lb. thrust trolling motor with it. The battery worked very well and I always charged it with a Dakota 3 amp LiFePo4 charger after each use. One day it read 8.4 volts and it hadn't been used. I put the charger on it and the charger showed the green light and wouldn't charge. So is this the same problem? I need to attach a 12v source to bring up the voltage to 12 so it will charge? Can I just use a standard wet cell charger to force 12v or do the battery electronics prevent this?
I tried the charger, which puts out 14vdc regardless of what the battery voltage is; doesn't make a difference. The LiFePo4 battery is down to 6.27 and won't go any higher regardless of how long you leave the charger on.
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 ✌️
Good info. I have a lifepo battery from a different mfg and have tried to jump start it. Didn’t make any difference and The case isn’t removable. Just to be sure I need to connect the charger to the battery while jump starting? Any help would be appreciated. Thank you
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?
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.
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.
I own two 12 volt, 200 Ah Ogrphy batteries. One functions fine - - the other does not. I previously had used both in series for a 24 volt solar system. I have since replaced them with several server rack batteries since I needed more storage. The malfunctioning battery shows 14.1 volts after I charge it with my Genius lithium battery charger. However, when I connect it to my 12 volt Giandel inverter, the inverter displays "Low" and then shuts down. I also tried it on a cheap PWM inverter which would not even turn on. The battery still measured 14.1 volts after I disconnected it. I then tested both inverters on the other Ogrphy battery and they activated both inverters and provided power. The temperature during testing was ~ 74°F. I purchased the batteries 28 December 2022 via Amazon. So I'm wondering what the problem & solution could be.
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.
Hey I didn't get a nice charger like that with my 100 Ah lifepo4 from Amazon 😄 How do you get the voltage to 50 % when I'm done using my battery for the season ?
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.
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...
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'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 glad I came across this, my brand new agm in my car was completely dead and my charger wouldn't even attempt to charge it, I did the jumper cable trick and low and behold it is now charging
Im glad this helped me out. My Renogy battery was dead even though it was on a solar with mppt from them and still died. They wouldn’t help me and came across this. Got it jumped started and now charging through my NOCO Genius charger
Some of us haven't even seen that blue box you have there, what does it do for the battery and why was the white box utilized? If it seems straightforward it's probably because you do it all the time. Can you do an example with a lithium ion battery hooked up to a lead acid charger
If you need a video to show you how to put a battery charger onto a battery then put the battery down, walk away and don't ever touch it again for your own safety and the safety of everyone around you 😔
Hello eduardoandreotto3504, would like to know if you had your question answered? I have a similar situation with 2 EG4 48v 100Ah that I let discharge to 52.4v. I can't charge them with my EG4 48v charger.
I ride a motorcycle and it has a Lithium Battery. I also have a Lithium JUMP PACK. The Jump Pack says to NOT USE ON LITHIUM BATTERIES. How do I jump start my motorcycle with its dead Lithium battery? Is it OK to just attached the JUMP PACK for a few seconds and then remove the pack and see if it will start?
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.
I had this issue when I First switched to LFP from Lead - (Learning Curve Ohh Boy ! much to forget and relearn anew) A Fellow Geezer had the simplest of solutions and I have never sufferd the problem again. The Cutoff Values in the SCC & Inverter/Charger Profiles and matching them to the BMS', so that cutoff occurs BEFORE the BMS force Cutoff (only has to be a 1/2 Volt difference). This allows the BMS to stay awake (some models go into "Sleep or Storage Mode" and will respond to incoming charge when present. This also allows the SCC to keep "in touch" with the Battery Voltage Sensing. LFP is at 0% SOC and discharged at 2.500 Volts per cell. 10V, 20V & 40V respectively. Cutoff @ 2.750 (is in the bottom Curve and Below Working Voltage Range of 3.000-3.4000 where the AmpHours come from but still alive enough to not go 0% and cutoff. By Setting Inverter/SCC Cutoff to 11.0V, 22.0 or 44.0 will resolve the issue. Even with Grade A+ Matched Cells discharging below 2.900 Volts per cell is down into the Cliff Fall Curve with very little to gain from it. 2.500-2.950 (Bottom Curve) and 3.475-3.650 (Upper Curve) only represents about 5-7% of total "GROSS CAPACITY" which should be typically 10% more than the working NET AH Rating of the cells. - Nota Bene ! DO REMEMBER that there is (always is) some Voltage Drop between Battery Terminals to Inverter / Charger terminals and Battery & SCC Terminals so that MUST be compensated for. All Lithium Based Batteries are Millivolt/milliamp sensitive unlike Brute Force Lead Acid Batteries. Pending on BMS, there may also be a setting to allow over discharge which is set usually in Seconds of Time, this is to allow for a heavy start surge momentarily when Battery is low, this shoudl NOT be longer than 10 seconds AT MOST otherwise there is a risk of pushing cells down to BMS Cutoff point. Remember the Working Voltage Range which is what provides the "Labelled AH" is 3.000-3.400 Volts per Cell. ALL WITHIN a 0.4 per Cell Volt Range ! 12 - 13.6 volts ( from 3.000-3.400 ) 24 - 27.2 48 - 54.4 For Current Connected & Other Vendors. It would be prudent to include instructions for the Charge Profile Settings for such batteries AND also to advise with regards to the Cutoff Voltage Points to use with SCC's Inverters & Chargers. And ALSO include something with regards to correcting for Voltage Drops and how to Calibrate that. Sadly, there are so many variations this can only be a generic datasheet to enclose with the batteries & devices. An Intro / Welcome document on how to commision the battery packs into service and teh steps required for a succeful instalation & happy clients. Never Ever Assume that the receiver of products has any idea of what they are doing ! Always look towards teh Lowest Common Denominator. RULE of 3 Applied ! If the same question, problem, issue arises more than 3 Times; - the Solution should be documented for reference. - if a "user issue" the documented solution or links to solutions should be included. - if an actual fault, then solve the actual fault before continuing sales etc. - AN OUNCE OF Prevention = a POUND OF Cure (and it's a boat load cheaper too)
Hi Steph, we REALLY appreciate your comment. YOU ARE SPOT ON! Regarding instructions for the charge profile settings for these batteries, we actually have your suggestion implemented. We list all these details on the product listing, so that they are a quick reference to anyone. On our new product, the 48v100ah server-rack battery, I'm looking at over a 100 page document because we are ensuring it has all the information to help a customer figure things out and be successful with the product. Far too few products these days have the proper documentation and it drives us NUTS! Regarding calculating for voltage drops, you should NEVER adjust your LVD based on voltage drop on the wires, because if you are running a smaller load the LVD will be totally inaccurate due to reduced drop. If voltage drop is causing LVD to kick in too soon, then sorry to say it but your wire is way too small.
Dear Steph, after proving you’re not a geezer by the amazing knowledge of battery electronics ,you proved you are a geezer like me by using Latin on TH-cam! Much appreciated! Almost nobody learns Latin these days! Ave.
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
I have a question that I can't find answer to. I have a 2019 kx450 that uses a lithium battery. Issue is it shows 13.6v in rest. If I hit my start button it sometimes starts but it may just click and I check battery. Battery has less than 1volt. I unhook it from bikes ground and it returns to 13.6v immediately. Is battery bad or something else?
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?
Bought a NOCO Genius 10 that’s supposed to trick the BMS into reconnecting to charge my Cayenne lithium ion battery. Not so smart the ‘genius’ charger. U my friend are genius, thank you!
Thank You so much for this info, you saved me, I thought I was going to have to buy a new battery, after this one was dead 5 days after the return window.
POSTER PLEASE RESPOND!! SO OMG YOU MAKE THIS MAKE SENSE. I HAVE 2 DEAD LITHIUMS. YOU MEAN I NEED PLUG IN THE LITHIUM BATTERIES TO THE CHARGER AND WHILE CONNECTED "A L S O" HOOK UP THE JUMP STARTED BATTERY??? I was taking the Lithium that needs to be woke and just putting it on the Jump Started Battery getting no results. I need to have it jumped WHILE ON THE CHARGER!!!!!!!!!!!!!! MAKES SENSE BRO!!!!!!!!! 👍👍👍👍👍
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!
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?
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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.
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.
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.
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,
Very informative video. I'm aware this video was made a few years ago, however I hope this comment finds you. I accidentally discharged 2 48v 100Ah EG4 batteries to 52.44v and my 48v high frequency EG4 charger acts as yours in this video. My question is, will the adjustable Nice-Power supply also wake-up a 48v battery? Thank you
We would recommend the EG4 Chargeverter in this scenario. It is capable of "Dark Starting" a lithium battery. www.currentconnected.com/product/eg4-chargeverter-v2-48v-100a-battery-charger/
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.
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 :)
You guys are fantastic. I'm so glad I bought my SOKs directly from you - the customer support has been great.
Very helpful, thank you! Now if SOK and these other companies could include this info when they package the batteries 😒
They do!
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!
Thanks! I haven't had jumper cables in forever. I'll have to try this
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.
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???
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, 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.
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?
My new 206 Ah battery reads 10.6 V. SOK says I need to wake it before my 40A MPPT will recognize it. How depleted is 10.6V? Once it's charge to 11V might the controller power on? Can I then connect solar, or must I use the charger until battery terminals read 14V? Help! Great vids!
I noticed you guys aren't listing the SOK batteries on your website anymore. I really like the two I bought from you.
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!
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.
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
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!!
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.
Thanks, straight out info... no frills.... understandable for novice. Thank you. Subbed and liked.
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
You certainly did make me have a better day!!! Thank you so much for this wonderful information. I'm surprised AmpereTime, SOK and WFCO do not readily publish this information. This is basic NEED TO KNOW that every LiFePo4 battery owner needs. Again - thank you so much for saving my hunting trip!
So glad we could help! Don't hesitate to give us a call if you need anything else!
Phone number??
SOK links to this video.
Will this also work for a battery that is asleep because it is too cold or do I need to warm it up before waking it to charge it? Thanks.
I had "dead" lithium batteries in the caravan put the charger on nothing happened nothing I did would work, watched your vid decided to connect the car running and Anderson plug whammo everything started to light up and the charger started to do its job, thanks heaps
Would this still apply if the battery is showing proper volts on a multi meter but not power up the electronics
will the Victron Blue Smart 12V IP65 Battery Charger work as well and have it's own power supply to wake a dead LiFePO4 battery up like the two models you suggested?
?
I had this very same issue with my 60ah Tracker LIPO, took it back to BassPro and they explained the same thing you have here. Good video!
please, dose this apply to lithium battery as well.
thank you
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
Will this trick work to restart the BMS in my Hysolis 48V power station (BPS3K)?
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?
I fix friends dewalt batteries this way. Its the same exact problem, charger wont see it. Easyspeazy. Great video!
So if I buy the Victron Energy Blue Smart IP22 I will not ever have this problem again right? And is 30amp ok for this battery in video
Do you have to disconnect the lead from the caravan on the battery before you connect the battery charger to wake it up cheers
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.
I have a Rebel 24 Ah battery that has had little use. I run a small 14 lb. thrust trolling motor with it. The battery worked very well and I always charged it with a Dakota 3 amp LiFePo4 charger after each use. One day it read 8.4 volts and it hadn't been used. I put the charger on it and the charger showed the green light and wouldn't charge. So is this the same problem? I need to attach a 12v source to bring up the voltage to 12 so it will charge? Can I just use a standard wet cell charger to force 12v or do the battery electronics prevent this?
I tried the charger, which puts out 14vdc regardless of what the battery voltage is; doesn't make a difference. The LiFePo4 battery is down to 6.27 and won't go any higher regardless of how long you leave the charger on.
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 ✌️
Does it matter what type of battery I use to piggy back too? Lead acid?
Wish I knew where you got the cables and large Power Pole connectors for the Aimes charger....
I wonder whether it is safe to recharge LiFePo batteries once they are completely discharged (like in the video to almost 0 V)?
Good info. I have a lifepo battery from a different mfg and have tried to jump start it. Didn’t make any difference and The case isn’t removable. Just to be sure I need to connect the charger to the battery while jump starting? Any help would be appreciated. Thank you
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?
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.
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.
I own two 12 volt, 200 Ah Ogrphy batteries. One functions fine - - the other does not. I previously had used both in series for a 24 volt solar system. I have since replaced them with several server rack batteries since I needed more storage.
The malfunctioning battery shows 14.1 volts after I charge it with my Genius lithium battery charger. However, when I connect it to my 12 volt Giandel inverter, the inverter displays "Low" and then shuts down. I also tried it on a cheap PWM inverter which would not even turn on. The battery still measured 14.1 volts after I disconnected it. I then tested both inverters on the other Ogrphy battery and they activated both inverters and provided power. The temperature during testing was ~ 74°F.
I purchased the batteries 28 December 2022 via Amazon. So I'm wondering what the problem & solution could be.
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?
Can this be done on a 48v ebike battery my charger not charging if i add 36v full 2+42 v would that wake up
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!!!
Hey I didn't get a nice charger like that with my 100 Ah lifepo4 from Amazon 😄 How do you get the voltage to 50 % when I'm done using my battery for the season ?
Thanks buddy! Just saved my water lines from freezing!
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.
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.
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...
Will this same method work with a 48v lithium battery and using a 48v power supply? My battery is completely dead. Reading 1v . Charger not kicking on
You can use that cheap white power supply to charge the battery as well correct?
My 12v Lifepo4 has reverse polarity and cant get it to go. I tried this method. Any thoughts?
Hi, how did you discharge the battery?
He didnt
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.
Wonderful video! Just what I needed to get my battery going.
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 glad I came across this, my brand new agm in my car was completely dead and my charger wouldn't even attempt to charge it, I did the jumper cable trick and low and behold it is now charging
Im glad this helped me out. My Renogy battery was dead even though it was on a solar with mppt from them and still died. They wouldn’t help me and came across this. Got it jumped started and now charging through my NOCO Genius charger
Some of us haven't even seen that blue box you have there, what does it do for the battery and why was the white box utilized? If it seems straightforward it's probably because you do it all the time. Can you do an example with a lithium ion battery hooked up to a lead acid charger
If you need a video to show you how to put a battery charger onto a battery then put the battery down, walk away and don't ever touch it again for your own safety and the safety of everyone around you 😔
Can I use this trick to restart the BMS on a 48V battery bank?
Hi! I have a 51.2v battery dead and have another working on 48v. Can I boost the dead 51.2v with the 48v?
Hello eduardoandreotto3504, would like to know if you had your question answered? I have a similar situation with 2 EG4 48v 100Ah that I let discharge to 52.4v. I can't charge them with my EG4 48v charger.
BMS did it's job and protected the battery
I ride a motorcycle and it has a Lithium Battery. I also have a Lithium JUMP PACK. The Jump Pack says to NOT USE ON LITHIUM BATTERIES. How do I jump start my motorcycle with its dead Lithium battery? Is it OK to just attached the JUMP PACK for a few seconds and then remove the pack and see if it will start?
THANK YOU VERY MUCH FOR THE INFO SIR, NOW I REACTIVATED MY LIFEPO4 BATTERY AGAIN WITHOUT CHARGER 🙏 from philippines 🇵🇭
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 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
Great explanation!
Thank you!!!
Junior was a legend addition to the GT and Giulia. So it's a great name for that Alfa.
I had this issue when I First switched to LFP from Lead - (Learning Curve Ohh Boy ! much to forget and relearn anew)
A Fellow Geezer had the simplest of solutions and I have never sufferd the problem again. The Cutoff Values in the SCC & Inverter/Charger Profiles and matching them to the BMS', so that cutoff occurs BEFORE the BMS force Cutoff (only has to be a 1/2 Volt difference). This allows the BMS to stay awake (some models go into "Sleep or Storage Mode" and will respond to incoming charge when present. This also allows the SCC to keep "in touch" with the Battery Voltage Sensing.
LFP is at 0% SOC and discharged at 2.500 Volts per cell. 10V, 20V & 40V respectively.
Cutoff @ 2.750 (is in the bottom Curve and Below Working Voltage Range of 3.000-3.4000 where the AmpHours come from but still alive enough to not go 0% and cutoff.
By Setting Inverter/SCC Cutoff to 11.0V, 22.0 or 44.0 will resolve the issue.
Even with Grade A+ Matched Cells discharging below 2.900 Volts per cell is down into the Cliff Fall Curve with very little to gain from it.
2.500-2.950 (Bottom Curve) and 3.475-3.650 (Upper Curve) only represents about 5-7% of total "GROSS CAPACITY" which should be typically 10% more than the working NET AH Rating of the cells.
- Nota Bene !
DO REMEMBER that there is (always is) some Voltage Drop between Battery Terminals to Inverter / Charger terminals and Battery & SCC Terminals so that MUST be compensated for. All Lithium Based Batteries are Millivolt/milliamp sensitive unlike Brute Force Lead Acid Batteries.
Pending on BMS, there may also be a setting to allow over discharge which is set usually in Seconds of Time, this is to allow for a heavy start surge momentarily when Battery is low, this shoudl NOT be longer than 10 seconds AT MOST otherwise there is a risk of pushing cells down to BMS Cutoff point.
Remember the Working Voltage Range which is what provides the "Labelled AH" is 3.000-3.400 Volts per Cell. ALL WITHIN a 0.4 per Cell Volt Range !
12 - 13.6 volts ( from 3.000-3.400 )
24 - 27.2
48 - 54.4
For Current Connected & Other Vendors.
It would be prudent to include instructions for the Charge Profile Settings for such batteries AND also to advise with regards to the Cutoff Voltage Points to use with SCC's Inverters & Chargers. And ALSO include something with regards to correcting for Voltage Drops and how to Calibrate that. Sadly, there are so many variations this can only be a generic datasheet to enclose with the batteries & devices.
An Intro / Welcome document on how to commision the battery packs into service and teh steps required for a succeful instalation & happy clients. Never Ever Assume that the receiver of products has any idea of what they are doing ! Always look towards teh Lowest Common Denominator.
RULE of 3 Applied !
If the same question, problem, issue arises more than 3 Times;
- the Solution should be documented for reference.
- if a "user issue" the documented solution or links to solutions should be included.
- if an actual fault, then solve the actual fault before continuing sales etc.
- AN OUNCE OF Prevention = a POUND OF Cure (and it's a boat load cheaper too)
Hi Steph, we REALLY appreciate your comment. YOU ARE SPOT ON!
Regarding instructions for the charge profile settings for these batteries, we actually have your suggestion implemented. We list all these details on the product listing, so that they are a quick reference to anyone. On our new product, the 48v100ah server-rack battery, I'm looking at over a 100 page document because we are ensuring it has all the information to help a customer figure things out and be successful with the product. Far too few products these days have the proper documentation and it drives us NUTS!
Regarding calculating for voltage drops, you should NEVER adjust your LVD based on voltage drop on the wires, because if you are running a smaller load the LVD will be totally inaccurate due to reduced drop. If voltage drop is causing LVD to kick in too soon, then sorry to say it but your wire is way too small.
Dear Steph, after proving you’re not a geezer by the amazing knowledge of battery electronics ,you proved you are a geezer like me by using Latin on TH-cam! Much appreciated! Almost nobody learns Latin these days! Ave.
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
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?
So can i hook up 2 chargers to the battery to make it take a charge so my main charger can start charging it?
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
I have a question that I can't find answer to. I have a 2019 kx450 that uses a lithium battery. Issue is it shows 13.6v in rest. If I hit my start button it sometimes starts but it may just click and I check battery. Battery has less than 1volt. I unhook it from bikes ground and it returns to 13.6v immediately. Is battery bad or something else?
I then hook ground up and bike usually starts instantly. I try to replicate it but usually it just random
I have a car battery charger that does the same thing. What a great thing to know!
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?
Can you charge these batteries with solar
Bought a NOCO Genius 10 that’s supposed to trick the BMS into reconnecting to charge my Cayenne lithium ion battery. Not so smart the ‘genius’ charger. U my friend are genius, thank you!
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
Thank You so much for this info, you saved me, I thought I was going to have to buy a new battery, after this one was dead 5 days after the return window.
will it take a long time to get going if i have a 72v battery
if i am using a 20v drill battery or should i use a 12v plug
POSTER PLEASE RESPOND!! SO OMG YOU MAKE THIS MAKE SENSE. I HAVE 2 DEAD LITHIUMS. YOU MEAN I NEED PLUG IN THE LITHIUM BATTERIES TO THE CHARGER AND WHILE CONNECTED "A L S O" HOOK UP THE JUMP STARTED BATTERY??? I was taking the Lithium that needs to be woke and just putting it on the Jump Started Battery getting no results. I need to have it jumped WHILE ON THE CHARGER!!!!!!!!!!!!!! MAKES SENSE BRO!!!!!!!!! 👍👍👍👍👍
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.
What's the process of jumper cables
Name of the power supply please I just wanna get one for myself please?
Other guides advise to raise a LiFePo4 from 0V veeeery slowly. But you say do it quick. Are they wrong?
The charge curve is extremely steep at this point, so even if you apply just a small amount of current the voltage will rise very fast.
@@CurrentConnected Are you recommending very small current?
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!
Great - did save me some money for my motorbike battery. Thanks!
Thank youuuuu i thought i was going to have to buy new batteries again!!! I bet this is what happened to my last ones!
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.
Please make videos about
How to repair 24v lithium phosphate
Charger (if we connect wrong terminal between charger and battery)
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?
When the battery goes to sleep what is the best way to do 2 full cycles of charging and discharging to reset the BMS SOC?