Revive dead ebike or lawn mover batteries
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- Опубликовано: 18 авг 2018
- Yes, it is possible to revive most ebike and lawn mover batteries
-- More information below! --
For those batteries sitting over winter or just left the main issue is the BMS shutting down due to low voltage. In this video we take a look at how we can get them going again.
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The most informative video, really help to repair some battery pack sitting dead in my workshop.
Very good! It was exactly what I tried!
Im gunna try this tomorrow as a new battrey for my bike is 200+ so if it works its a bonus thanks man
Thanks! I did learnt something from you.
Brilliant ! Just what I was looking for, thank you!
Glad it helped!
What if we just keep them topped off all winter ?
excellent explanation, thank you....
Thanks for the knowledge.
Excellent video.
Damn what a great solution, i wish that i found your channel sooner. Truely this is really good stuff.
So can you give your suggestion on how much time would you take as the mininum and the maximum time limit for charging each one of it?? I'm truely need your advise, base on your understanding and experience what would you recommended as the minimum and the maximum time range to take so that im not gonna harm it by charging it to long or too short.
Thank you my friend.
Nice job
Awesome thanks for the information very very good
Really nice, dude. Weird that the cells discharged themselves! Even more weird is the fact that the BMS won't recharge in this case.
MC's Creations it not weird every lithium battery does that.
Dennis LiPo batteries definitely do. That's why you should never leave them charged - otherwise they're going to be destroyed... They lost all it's capacity. But LiIon, like the 18650s, never done that with me... And if they do it means they're not good anymore.
@@MCsCreations You have to be careful, there are some really bad 18650's on the market. All claiming to match the specs and performance of Samsung cells. I bought a brand new battery pack for my laptop and didn't get 6 months out of it before it died.
You saved my life, thank you
Love your channel. I am building a off-grid, solar system with 48v battery bank of 18650s. So far, I have 180p14s (2,520 cells) yielding 390ah @ 48v. I've set my Midnite Classic 150 to shut off at 47v (3.36v/cell) and battery on at 54.6 (3.90v/cell) yielding about 60% DOD based on 4.2/cell -> 3.0/cell for 100%. Battery University (and other bits) indicate 60% DOD lead to 5,000-6,000 cycles before cells drop below 80% capacity... but info seems a bit fuzzy. understand that if I went to extremes like 25% DOD instead of 60% DOD I'd extend my cycles to 10,000? or 15,000? - but 25% DOD is only 5kwh where as 60% is 12kwh (in my case).
I have my controller set to a range of 3.90v -> 3.36v/cell (58%) assuming 4.2v -> 3.0v (100%). Do you have any thoughts / advice on this? What is reasonable DOD? What voltage range do you use for max/min? Do you do full charge (to max) before allowing battery drain or just set 1/2 way (say 3.6v/cell) for inverter on?
Any info / thoughs appreciated :)
if your charging regularly the latter is sufficient. oh yeah before i forget our time is important stop with the drabble please your the only one trying to be impresed have you got that 25% iso 9001
dont thank me, thank you man. great vid
Your the man
Could you do this with a standard multi voltage 1000ma PSU or using one battery that's fully charged?
Spacey bar 🖖😎
what kind of balance do I have to use for a 24v Power wall? It has 1025 .64 watts. 7s 18p nominal 25.9v. What balance should I buy? It's for a solar system
Hi! What needs to be done to make sure that the cells get balanced properly after the charger is able to charge them.
PERFECT BRAVO !!!
Hello one question: I saw a video where someone measured all the Li-Ion cells of an escooter individually.
3 cells had about 2.8 volts and all others 3.4 V. How does this extreme drift come about, how can it be prevented???
Thankyou
I also have the same mower as you, (RS630) with same battery and same problem. I was going to connect charge head directly to main battery terminals as you did to bring voltage up. Then I noticed that the factory charger outputs 34 volts. What is your thoughts on doing it this way?
Do you have a recommendation for a bench power supply? Thanks!
If I want to look at Amazon, what's the name for the charger you use in this video?
☝️What he said. I see he never got an answer.
Can u post a how to for your charger?
Are the connections you are making at 5:45 equivalent to charging using the discharge cable?
What make is your battery charger?
Where can I buy the parts to make an adjustable charger like you have?
going around your neighborhood offering to balance the neighbors lawn mower batteries (maybe even the snowblowers) might be a decent gig for a highschool/college student.
Can I use the factory battery charger to charge the cells outside of bms ? or do I need a specific charger like yours. Thank you for the informative video.
You can use all chargers that support slow Charge or low voltage Charge. For instance nimh settings as start
Did you found a solution, mate ?
My battery is low voltage too and my factory charger can't charge it anymore because of that and i'm a bit afraid to charge it directly to the battery past the BMS with the factory charger..
@@Samishii00 go through the cells and see if they output voltage if they do. It's the BMS not working. You charge directly the cells disregarding the BMS but you will need to change it for the cells to balance correctly later. Using the charger on the cells directly will work if the voltage output is correct and you wire to the negative and positive terminal of the battery respectively
@@hedialaya3230 Thanks for the answer mate !
Hard for me to do that tho' since i can't get the battery out of my scooter without damaging a lot of things.
If i buy myself a Modulable power supply, do you think i could directly branch it to BMS so that it charge the battery, if i lower the tension enough ot be in range.
Cause i have a 48v battery but when i put my multimeter to it i just have 2V or 1.8V, that's low as hell !
Can I bypass the BMX with the original 36 v charger. By slicing the wire and use small clip wires to connect the whole 36 v batteries for 15 min
Can you please give us a link for the charger you used? I looked in the description and didn’t find it. Thanks!
Its not a charger but a powersupply. This one basically ebay.to/2RaTAiv
Where can I send my Panasonic 48v for that type service? Mine sat for 8 months ?
QUESTION:
I am trying to revive a 52V 20ahr ebike battery that I let discharge over the winter months. I have a power supply connected (set at 52V) to the pack leads. I started charging at .5 amp and over a two-hour period have increased to 2.5 amps.
What do you recommend for a charging amp rate?
The battery came with a 3-amp charger that I will connect when the battery reaches 52Vif it doesn't catch fire ha ha.
It worked, battery is now on the charger!!!
I'd like to consult with you about a LECTRIC e-bike battery whose charging port got wet....
Thank you. You may of help me out of battery hell.
Very good explanation
Hello
Can I ask your charger on your desk? Have you connected directly the battery to charger ignoring bms? Then, it is balanced automatically? I want to ask you the model name of it.
Yes
@@DIYTechRepairs Can I ask the name? It is general multi voltage power supplier?
@@JuJu-zb7rt yes it is
Our ebike battery show only 0.996v instead of 52V, it charged up but still show same. Any suggestions? Thank you
You charge until the charger disconnects, wait 6 hours, discharge slightly and then charge fully again.
A few of these cycles will balance the cells.
Does this really work?
@@mct8888 Only if cells are in good state.
@@xerejuneseve6333 what does the 6 hours have to do with it?
@@xerejuneseve6333 what is the relevance of the 6 hours?
Why wait 6 hours?
What is that digital readout device on your bench? And where can I get one? I have an ebike battery I would like to revive if I can.
Links in description
ebay.us/vA3oLM This is the device. Exist in multiple sizes too
@@DIYTechRepairs That's great thank you. At that price ($34 - $50) it's so much cheaper than getting a new battery.
what is the minimum voltage for each cell below which the bms blocks the charge? 2.6volt or less?
Depends on the bms but its ofte. Around 2.5v
@@DIYTechRepairs Ok thanks, in your opinion with these Chinese bms it is better to bring them to 3.85volt/cell (for storage battery), is it better to get there from a higher voltage by discharging the battery or from a lower voltage by charging? I ask this question because I don't know how the balancer works in these cheap bms.
@@sandroz321 they only balance by overcharging. Ie Above 4.25 v
Red cable is + and black is - right? Then why You connected red cable to negative side of cell?
Where did i do that?
Whats that charging device you are using called?
dps device. Like this: www.ebay.com/sch/i.html?_from=R40&_trksid=p2334524.m570.l1313&_nkw=dps5020&_sacat=0&mkcid=1&mkrid=711-53200-19255-0&siteid=0&campid=5338074051&toolid=11800&mkevt=1
Can you repair the bike battery for me
Can you share the Brand and Model # of your battery pack charger? Please?
I looked at the link you provided to Kado Francois for the power pack but it is a little confusing to me. Is the model # dph5005 correct?
@@BigRigTom yes
@@DIYTechRepairs Thank you and I found it at Walmart. Great video and information too!
But why the BMS can’t balance the battery pack?
Most of those bms type balance based on overcharge only
Too bad I'm a plumber. This stuff gets me nervous. But I need a bench device
:) you can buy kits with the PSU to or even better a full pre built unit :)
Why the full battery when you try to used and 10 minute after go dead
Battery companies need to do better with this crap. I've never had this problem with the lithium batteries for my power tools. I have batteries that are like 15 years old that never go dead like e-bike batteries.
Heyy eveyone my battery ran out and it won't charge, any help?
First!
I’m sure he’s really good at what he does but communication is not one of them 🤦♂️