Must LITHIUM BATTERIES be BALANCE CHARGED ? #15

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[@ingeborgsvensson4896]

Some years ago I installed an extra 4 kWh battery pack in my 2008 Toyota Prius, it consisted of two packs 24V of 6 LiFePO battery banks in series. The 48V was then converted into 200V and set parallel to the existing battery. After a couple of months the capacity dropped rapidly and the BMP kept moving charge from one cell to another. I decided to take the BMS completely out of the system and within two weeks the cells fully recovered and I got the full capacity back. The problem with a BMS is that it looks at voltage only, not charge. Nice explanation, thanks for the video!

[@gren.hansen478]

Been in electronics a looong time Best explanation I have heard. We are never too clever, or too old to learn.

[@snafu21]

Clicked play, was interested, and a couple seconds later it had been 13 minutes. Good video

[@HentaiNat]

atheist?

[@snafu21]

hentai nat Yep Yep

[@HentaiNat]

Bro, nice to meet you.

[@seansteel3326]

@ Michael Ramey, Exactly the same here.

[@esqueue]

Random question. LOL!!!

[@jimginnyohio]

Great explanation. Most people that complain and criticize never actually do what they are criticizing about. On the other hand, you are speaking from experience! Keep up the great videos!

[@bukolaayeni78]

jimginnyohio, Thank you

[@Cooldipo]

@@bukolaayeni78 hello Baba, are you in the country? Can you join in a Powerwall project?

[@leviahamefula3994]

@@Cooldipo where is this going on? Interested

[@bizim_eller]

jimginnyohio, you explained beautifully, I own and operate a restaurant and thank God that I get very few comments coming from those kind.

[@storxusmc]

great video man, there was an article in march version of home power magazine that covered this very nicely, they took 48 cells all manufactured from the same place and on the same day, they then split them into 2 groups, they made packs of 4 cells. on 6 of the packs they installed a very commonly used universal battery balancer on them. then they left the other 6 un-balanced as a pack, then they ran them under loads using the same load over and over to simulate usage on the cells to use up the cycle life of the cells tell the capacity of the cells starts to drop. in the testing they found out that the cells that were hooked up to a battery balancer during its charge cycle reached its 1/2 cell capacity limit 37% faster than the cells left unbalanced, the theory behind this is that when the balancer is balancing the cells its applying a micro load the cell that needs balanced in the pack and when it does this the pack voltage drops and the charger sees this drop in voltage and starts charging the pack over and over tell the cell is considered balanced, these micro loads and charge cycles during the balancing phase takes micro portions off the cell cycle life over time, resulting in that cell wearing out quicker... the only benefit of balancing the pack is to get slightly longer pack life out of a single charge when in use... the more cells you have in a pack that spreads the amp draw reduces your need for balancing, because the cells will stay closer in voltage as the cell capacity increases on the same load over time..

[@mrclark10001]

Thats really interesting. Do you have a link to this article? I think for my off grid batter bank I will be going down the route of LiPo, Hobbyking has some great deals right now on some packs and I can build a 1.5kwh 48v ish pack for very cheap. My concern was balancing but I think I will go down the route of a Meanwell variable 1.5kw supply that I can vary by a microcontroller. This will monitor cell / pack voltage and give me complete control. I have balance chargers already so no problem doing a balance charge every 10 cycles perhaps?

[@rksg2003]

William link would be a plus and thank you

[@SamB-lc9cn]

A link to this would be great

[@nostamine2567]

I appreciate the time you put in writing this . It really helps me , you are the best 💪🏽🎰

[@makeenibada4753]

Goddamn crystal clear explanation, better than my university professor !!!

[@henrywashington3732]

I made a parallel pack of five 18650 cells to run a small 3.5v lamp. I charged 4 of the cells individually to the exact same voltage and forgot to charge the fifth because I wasn't going to use any battery monitor for this pack. I solder all five cells together and leave it sitting there for about an hour. I remember I didn't charge the 5th cell so I disassemble the pack to charge that one cell. To my surprise all 5 cells were exact same voltage 4.1. I know that the 5th cell was 3.8v. I guess those 4 fully charged cells charged that last one to equal them all out.

[@charlestatakis9363]

Nicely explained and clearly stated. When most of us recycle all kinds of 18650 cells from old laptop batteries I'd bet most of us worry about charging and discharging them out of recommended voltage ranges. I just use two B6 chargers to manage the individual parallel banks so they are balanced. Since the cells vary wildly I never get them perfectly balanced but as you said, when they discharge at a rate of 2 amps each it doesn't matter.

[@truedepthaquaponics7118]

Yay! Less cost of charging and alot less thinking involved in this aspect now. Very clear, thank you

[@elektron2kim666]

Professions are compartmentalized quite much so everything is a larger journey each time we dive in to a subject.

[@TheMarcball]

I finally got your point, Jehu. so it's not so much about perfectly matching cells, it's about designing the whole pack big enough that your discharge rate per cell stays below the discharge rate of the worst performing cell. Now, how do you track that discharge rate cells, by the way ? do you write down how long it takes to discharge from 4.1V to 3.2V ? I guess i can do this with the BTC3100 which tracks mAh and time elapsed during discharge (processing 4 cells separately at 1A "in parallel"). waddyathink ? Thanks amigo. Keep on trucking ! (from France)

[@avid0g]

When charging batteries to 100%, the cell balancing becomes most relevant since outliers will cause overcharging. If the overall regulator stops at 80-90% charging, the cell limits are not reached and balancers would not even activate. This also increases battery life to the greatest extent. LiFePO4 Chemistry is far less sensitive to overcharging (at low currents) and incidentally is very efficient.

[@MrPir84free]

I flew RC heli's with those sort of LIPO packs and many I knew didn't balance charge EVERY time; we would check the voltages of the individual cells, but often that was a cursory check done towards the end of charging, and /or as part of pre-flight. We would preach to new flyers to always balance charge, but that crowd often used the manufacturer's charger which charged thru the balancing leads anyways. However, we often didn't practice what we preached; there were many other factors far more important than balance charging.. In an ideal world, we'd balance charge every pack; but it takes longer, and always bleeds out some power doing so.

[@leebartley9214]

Converted my weed eater to lithium battery 5 18650 cells in series total 18.5 volts. I use weed eater for approx. .5 of an hour to weed edges. My question is do I need a BMS and if not how long should I keep on the charger? The old NICD did not have a BMS either.

[@jestronixhanderson9898]

I have run my DIY powerwall for years with no balancing:) they stay balanced enough and every six months or so I'll manually balance them. Cells become unbalanced when you hit their limits all the time, I daily cycle my pack about 50% so lazy cells never get the chance to shift a pack.

[@alexandreesquenet3736]

Delta in voltage grows as well when getting fully charged or discharged at 90% (I see it on the Winston 200Ah)

[@taylorquimby4004]

I didn't need the long-drawn-out and simplified explanation of why some batteries may need balancing while others do not... but you did such a magnificent job at it that I just continued listening for fun lol 😅👍

[@pault5179]

There may be a risk that if even just one cell in a parallel bank develops a significant self-discharge current, it could cause that bank to reach 0% much sooner than the other banks? (and once the voltage plummets, the discharge current would then rapidly reverse charge the empty bank, killing it, even if it wasn't already damaged from the

[@gravelydon7072]

Which is why the packs ( 7S ) I am building all cut out at 29.02 Volts. 7 X 4.145 with me charging them at 29 Volts max makes for cool LiPo batteries. At rest, they come in at 28.7 Volts which is 4.1 Volts per cell. Each pack of two parallel cells has a dual BMS board on the pack.

[@MrSurvivalDude]

Haha I love how the video end with your high hopes for the drone to help storytelling and it crashes at first launch. I almost picked myself. Keep up the good work sir you are not only brilliant but entertaining at the same time

[@jonjudice1155]

As far as my understanding of batteries go, when you put batteries together they balance themselves take a fully charged battery and connect it to a used one, the full one transfers its energy to the used one until equilibrium is achieved

[@MrSummitville]

I would *NEVER* connect a fully charged battery to a discharged battery ...

[@veresij_]

Not in series, thats for sure. But if you do it in parallel they will balance each other out.

[@panospapadimitriou3498]

flip crashed that drone in the first attempt is so motivating!!!!. unlessit breaks something !!!!!! keep up

[@JTrained]

This was a helpful item you pointed out, it'll be useful to know the discharge rate of the lowest denominator battery in order to get an EV to run for longer. In student FSAE there is an endurance test which will benefit from this 🙂

[@melodysouljahrootsdubpress5539]

Thank you, that is really informative. Absolutely it's down to application. I'm off grid running solar. I'm over sizing my bank which basically means I don't need to worry about balance and also maximize cycle life as the bank will be charged to no more than 80% and discharge to 25-30% of capacity. Hopefully this might lead to the bank lasting as long as I do. If I need serious power or very long run time, I just ramp up charge voltage and accept deeper discharge cycle. Great video...

[@MrSummitville]

Max life = keep the battery temperature stable ...

[@kokodin5895]

question about batteries when you make multicell pack eg 50 cell paralell in each big cell and 6 big cell in series on which point should you charge, ballance your pack? 1 empty all cells to equal level and then charge 2 connect all fully charged cells 3 connect discharged cells, charge each big cell and then hook them up ?

[@bigviking0001]

This is probably the most informational video I have seen yet on conceptualizing a battery pack for my electric vehicle. Thank you for clarifying many things. My vehicle is powered by two 500 watt, 48V hub motors. The current battery pack consists of 4 Sealed Lead Acid 12 volt batteries. Very heavy and doesn't deliver the range I need. My desire is to build a Life Po battery pack of 14s7p to provide me with 550-720 watt/hours of use. with 98 cells, I was confused about balancing vs. monitoring. Your explanation of power drain was very helpful. Since there is doubt in my mind about many of the Balancers ability to actually balance cells, I think I will stick with not having a BMS. It make further sense as I will not be requiring more than 20 amps of power at any time (most likely 10 amps steady), so the drain should be low compared to the capacity (below 2C if I am correct). Thanks again.

[@ponkuna]

Hi Jehu, I just joined yesterday and today I opened a battery froma dead laptop and found all 8 cells are in good shape. I made a small battery bank and my led lights are working on that. Thanks for your teaching. Question:- after putting 100 used 18650 cells in a powerwall how to see ballance charging and which battery is stop working aftyer few months?

[@TheOffgridkid]

Using no BMS with my solar systems lifepo4 batteries, just top balancers & cell meters for some low voltage protection. working great, going on two years now...

[@jfbeam]

Unless they are being overcharged, deep cycled, or carrying huge loads, it's generally not necessary to monitor and balance all the time. Once they are all at the same potential, they will tend to stay that way -- until a cell starts to die, which is why one should periodically check the levels across the pack. Cars have an active BMS to do this because no human is supposed to ever see the batteries. (it has to be 100% automatic, 100% of the time.)

[@VinsPol247]

Just charged my DIY 13s 4p 48v ebike battery I made without a BMS. This video gave me confidence to try it. Of course I monitored it's progress the entire time. Worked like a charm...Thanks for the info...

[@yoyyoy1390]

May i know the status of your bike sir without bms?

[@NimblyJimbly]

Another great video! Thanks for sharing. Would you mind showing how you figure out what the weakest cell in a group is? Also, in a large pack (or maybe a small one?), is there a standard C rating per cell that you try to stay below during max charge/discharge current to ensure that all cells in the pack will charge evenly? Unrelated, but I'd love to see a follow-up to your bottom-balancing video - one where you demonstrate the process and how it's done. :)

[@dougveit]

Jehu, I love your style my friend and appreciate all that you do and teach. Great thing, please keep it up!

[@57beanyboy]

Quite a few people are n ow advocating not using a BMS. Very interesting info.

[@drunkramen]

I'd totally make one of those lights if you posted a How To video. Great explanations!

[@jehugarcia]

+DrunkRamen coming

[@jehugarcia]

+FilmGelenk632 FilmGelenk632 yes

[@jehugarcia]

i have no idea what you are doing with your cells, if you are going to use 6000 of them to move a car around you have to balance them once them they will be fine for a few years

[@Ganuesthai]

Does Tesla use any kind of BMS for each cell in their cars' batteries? Just curious.

[@totelife6443]

DrunkRamen No sir, they dont.

[@Shmade0304]

Seeing this years later and seeing your wall in the background it seems naked

[@quarklan]

Great demo. Really shows the difference what a high load can do to a battery.

[@beneby4923]

I don't do the BMS either, but I do balance charge and have alarms set if a set of parallel cells is misbehaving - but mine is just a 14s ebike battery so balance charging really isn't that much of an issue -- If you have been running that way without issue for 2 years maybe modern lithium cells are more durable than we give them credit for

[@always.3.3]

This video is awesome. Thank you for the time and knowledge you put in to this!

[@cddamiao]

Great video, and e need some help here.... I have a electric scooter 48v/52v 18ah battery and the BMS died, can i remove the BMS, and start to cherge the pack by the thick positive and negative wires? Without the risk of explsion..? i only have a 42volt battery charger that i use in my electric scooters, lke Ninebot and Xiaomi... thanks on advance :)

[@johnibrahim9328]

I just have a question I have build 60v battery pack 20ah with lishen cell 4000mah after 4 months start to get fully charge 66.7 in place off 67.2 are this can be need balancing or thats normal

[@MauriatOttolink]

Entertained and highly informed. I enjoy your relaxed, friendly and authoritative style. Makes me feel comfortable heeding what you say and confident to act upon your advice... Thank you.

[@torbenliennielsen82]

This is pretty cool. So i’m doing this electric catamaran boat project which is going to have two 48v 6kw outboard motors which will draw a maximum of 13kw in total, and power will be coming from 4kw of solar panels and 75kw of tesla modules. I have been looking for the right BMS for these modules, but after seeing this video i’m not really sure i need any BMS in my system. What do you think?

[@MrSummitville]

2 @ 6 kilowatt motors = 250 AMPS, is a substantial load ! You need to verify how much the low-end cell voltage varies under load, and how much the high-end cell voltage varies when fast charging.

[@recepgunoglu4058]

This video is so incredibly smooth. Damn.

[@colinjensen1683]

Made 2 18650 battery packs. A 4s7p and 3s1p. Charged 4s7p using a 30v output connected to a buck charger. I set buck to 15.8 volts and limited current to 1 amp. On the 3s1p I used a 12v output adapter that plugs into 120v. On both, the BMS had an output and a charge input connection. I connected both to the BMS charge input to charge. The batteries worked great. But when I tried to charge the second time the charge wires got hot. On examination I found all batteries measured .4v. Should I not use the BMS charge input and just use the BMS output connection to charge? Lost a lot of money. Any suggestions will be appreciated. Probably not the proper place to post this but didn’t know where else to go. You are obviously very knowledgeable and maybe you can help. Thanks so much for your videos.

[@kleavenae]

Very good video. It's hard to find good information about this topic on the internet. It would also be nice to have an explanation about the difference between series and parallel connection in regards to charging. To my knowledge batteries connected in parallel are quite forgiving if you don't balance them, while batteries in series can be dangerous if not balanced (with high load).

[@ra8620]

Balanced charging means when you drain the juice by the huge volume discharge if slow then not matter. Means obvious your stock and consumption if close enough to drain you quick enough then it does matter.

[@jgbelmont]

I get it but what about people charging cells or cell packs like they were SLA batteries? Hard on them right? I mean is a different power curve all together.

[@weazeldark3983]

And wen you have heaps of cell's in parralel the cell differences are nothing since it all becomes as one cell

[@mikakorhonen5715]

Thanks, this is critical info for my project.

[@lukewalker1051]

You are a great teacher. Thank you.

[@MrAsus3571]

Still think the bt3100 doesn't check resistance?

[@robinorca2877]

jeh i need 624 lipo pouch 5000mah 100c bateries do you know where i can get them

[@drx_ander]

I didn't see what happens when you turn of the lights. Was the Voltage difference bigger than before? The BMS is not for discharging. For discharging you have to use a protection circuit.

[@davidurdahl6656]

Do you know much about the use of 18650s in vape devices? We tell our customers to get a charger because charging via the device with usb doesn't balance charge them. Are we using the wrong term? Like it's a drastic difference in cells. I've seen batteries supposedly fully charged but ones at 4.something and one at like 3.8...

[@boyangles6405]

David Urdahl in vaping we stress our batteries much higher than his application. For example, running dual 3.7v 18650s in series at 150 Watts requires about 20 amps. And that's without the inefficiencies in the voltage regulator.

[@stephenmichael3211]

Vape batteries usually have a capabilities of drawing & discharge higher current compared to normal batteries. I think, the batteries will draw high current if you charge it via the deviced (vape). As the video shows, the more current you draws from the batteries (discharge), the higher possibilities of it to become imbalanced between cells. The same applied when you charge it with higher current. Some might fully charge first than the other due to the differences between the batteries, and the charging will stop but only one of the batteries are fully charged & the other are not. By using a charger, there will be no issues since the charger will charge the batteries individually. Both will be charge fully regardless of differences.

[@dsfghzxc6604]

8.4 volt? shouldn't it be 3.6 or 3.7 times 2? shouldn't it be 7.4 not 8.4 volt?

[@smsking2]

If you look at professional power tool batteries, most of them don't include any balancing (Bosch, Makita). Interestingly some cheaper brands (Ryobi) do. I would guess the quality brands spend more time on matching the cells, so balancing is not necessary,

[@giottodiotto1]

EXCELLENT presentation, keep these good vids coming, very informative!

[@atefamriche9531]

great example demo. best I've seen I wanted to ask you a question: What do you think about charging a 52v 20ah Li-ion battery of an ebike without balancing? my BMS died a couple of days ago and I am debating whether to get a replacement BMS. I know how important it is to stop before low voltages and can do that with a precise monitoring app. I still have my old charger that I was thinking to modify so that each cell gets a maximum 4.1v instead of 4.2v. Thank you in advance for your help

[@medman36]

Do you still stand by your statement that a bms is not needed for Li ion cells/batteries? So many videos today are increasingly talking about bms for battery packs. What is considered the threshold voltage. Is that minimum cutoff voltage or maximum cutoff voltage, 3V, 2,5 volts or 2Volts?

[@noweare1]

No shenanigans just excellent information. I like your style, you are very smart. Awesome electric bus you got there too. Thanks

[@warrengray610]

I liked the video, I was curious though what did you use for short circuit/overloads for vehicle

[@firpofutbol]

For your everyday charging maybe not essential. So what happens if a cell is defective and wants to catch fire. A BMS would be able to turn the whole system off, wouldn't it? Without the BMS sensing temperature and voltage issue, how would you know you have a bad cell?

[@ra8620]

His RND lab is a break through because of his passion. And very valuable knowledge giving it free thanks to him.

[@meowzic]

I'm using thunder sky lifep04 3.2 60ah batteries in a 12v solar powered system for an RV. Would I need to balance these?

[@SirCharles.]

I want to make a 18650 li-ion pack for my old motorcycle, but idk if I need to do 3 cells or 4? And does it need to be balance charged? I still need to check the voltage output of my '71 Honda CB350, but I need to upgrade the regular & rectifier to a newer combo unit first. But I'm just curious cuz I've seen lithium batteries on the market, specifically targeted for motorcycles, and they seem to be 4 cell packs with no charge circuit or BMS or anything at all. I just don't know if it would be ok to use one with a much older and less reliable motorcycle electrical system.

[@billbucktube]

I have a '20 volt' Black & Decker battery pack with 5 cells that one of the 18650s is reverse voltage at about 7.5 volts. Ummmm... What happened? Is that cell busted beyond saving? I can charge it correctly uding my bench power supply, but is the reverse charge showing it is a goner? By the way, the cells are in correct orientation in the pack. I think my grandson ran the pack flat before charging it. I wonder if the BMS has failed?

[@samguapo4573]

@jehugarcia if you don't use BMS, what is your methodology again in charging without one? I use a BMS but one time the BMS got busted and my LIFEPO4s got screwed.

[@rickeyl.mcspaddenii4729]

Is a 18V Li-ion power tool battery demanding enough to require balance charging? And or a battery management system?

[@vinayakkarne888]

After balancing the battery during charging, what is the probability that it will imbalance during the discharging..? I mean if balanced cells are used to drive load like EV then does the cell imbalancing will occur during discharging. If yes then how to balance discharge..?

[@harrycrawford8517]

On your EV do you have a system to prevent over discharge & over charge of the whole pack? Interested if you are having to manually prevent these possibilities or if you put some sort of electronic control in.

[@UrockEntertainment]

A question. I want to power my Chauvet Slim Par 56 LED lights using 18650 Li Ion cells. The battery will be mounted on the outside bottom of the light instrument. My plan is to use 9 cells ... wiring 3 sets of three in series then connecting the 3 sets in parallel. May I ask your advice in wiring this battery and using the correct onboard (PCB) charger. Do I need to use balance wiring? I am hoping to get about 6 to 8 hours when fully charged. Thank you.....I love your videos/ Very informative.

[@skaltura]

Good info right here! This is something no people usually tell you. I've been wondering do you really really have to balance charge all the cells each and everytime.

[@tennicktenstyl]

Is it safe to use a 3V zener diode to protect a battery? The zener diode connected to gate of a MOSFET that controls the battery's output with a pull-down resistor of course.

[@246jonhy]

Hola jehu en el min 8:30 se muestra varios dispositivos electronicos. Me gustaria que dieras el nombre de cada uno. Gracias

[@dsfghzxc6604]

sooo... the lipo, if you only draw 100mA they won't need a bms?

[@nickmestas2218]

The absolute hands alltheway down college level clarity. U Rock !

[@MrBrymstond]

Charging 18650 batteries using a buck converter or whatever you're using will charge the battery up to 4.2v or what ever it is set too, but what about the constant voltage and the constant current part of the task of charging? How does this method deliver the correct method of a proper charge? Trying to fully understand so I don't have batteries prematurely dying off and putting out the full amount of amperage without the worries of balancing them? Thanks.

[@hasanali-ht2kq]

Hi thanks 1- Can this( DELL J1KND 48WH 11.1VOLT )laptop battery be used as a power bank (without open it)and charged without laptop? 2. If possible, which board is suitable? 3- What pins are for charger and discharge connection? Please write an answer with Google translation into Persian I do not know english I can not copy here and past on google translate

[@n1kkri]

Nice talk, I often wondered on LiPo batteries used for R/C planes and Quadcopters that have 2 plugs, one for balancing/monitoring and the other for charging why not just charge through the balancing connector. Would not each battery have its own separate charge and will charge only up to the point until they reach their target voltage? As each one reach their target voltage the charging would stop. Charging might be a little slower due to the size of the wire would limit the current on the balancing connector however you would not need the charge/discharge action that normally happens when using the balancing connector as intended. I would think if less charge/discharge action has to happen it might extend the life of the cells and save a little charging time. This is sort of like having a charger that can charge 4 individual batteries the you insert. Each battery has its own monitoring and charging action. When they complete the charge they shut off and you remove them.

[@MrSummitville]

The balance cable wires are tiny and charging via the balance cable would take forever ...

[@jedics1]

Good explanation, so I could do a powerwall using the cell log 8, or two of them to check my packs periodically? I think I remember you saying that you dont leave them connected because they ironically unbalance the packs over time?

[@EpicAdvanture]

What are his batteries that don't need to be balanced called?

[@SilvisSamitis]

Thanks for the practical demonstration. It helped me to understand it better.

[@davey2k12]

thanks for telling me I got crap fake18650s from eBay every time I use my bike the set on positive side gets hot but the rest are normal temp so I check with balance imax and get all sorts of voltages lol I have been using em since last September not bad for fake blue 5000mah more like 300 to 500mah lol but I yet to buy some decent ones when I get some cash flow.... I've learnt a lot about batteries from you thanks bro

[@truthseeker6649]

experience is what matters most. thanks !

[@rominhawk3949]

Thank you JehuGarcia; this was a very helpful topic and you did an excellent job of explaining it. Btw; I like your T-shirt JAG35; nice graphics. Is it your creation?

[@johnhamilton4449]

Interesting, but confusing. Applications vary, for instance if I need a lot of power (50A @ 28V) for a very shout period of time (45 second), with a lot of time for trickle charging in between, can I get away from balancing. Or if I always trickle charge to a lower voltage can I get away from balancing? BTW it is a LiFePO4 battery pack.

[@DinoPasic]

Tesla module from model s85, do i need some extra BMS or not? If yes, what do you suggest? Thanks

[@Nostrildomus]

Dang Jehu I just may have learned something and that is amazing . Thanks mon

[@bobjackson4720]

Is it usually/always necessary to change the charger if you go from Nicad to 18650's if you have approximately the same voltage value. (For battery drill)

[@madmaxx1971]

I have one ? Is there a way to trickle charge my cordless drill battery’s during down time like months of not using them, I getting sick of buying battery packs because I forgot to keep them at 60 percent charge. I keep my motorcycle battery on a battery tender and it’s fine every year after sitting for the winter. Sorry to ramble on just getting frustrated with having to buy new battery’s for my cordless tools. Tools are lithium ion packs

[@srinivasan7790]

I cant understand what happens when one in the 3 cells connected in your example reaches lower threshold voltage. Do u mean to say that they are automatically charged from other two cells??what happens at the exact moment when these one cell reaches lower threshold level?

[@jeremy_6838]

But how do you protect your 18650 cells from over-charging and under-discharging.? I want to make a 20S12P (or more parallel) li-ion pack for my E-scooter and looking for te best, safe and cheapest way to do this. Any ideas for this.?

[@oz457]

Hi Garcia, Can you please make a video about how to charge your electricity vehicule to get the most out of the batteries. One major question: do you drive until you get close to a flat battery and THEN charge, or do you drive and after a short/long drive, you charge the batteries up again. I happen to have a scooter. Sometimes, I drive a couple of miles and charge the scooter already even with 80% of battery still left over. The main reason is because I want to get the maximum mileage once I start driving every time. Maybe it is not a good idea for the batteries? Please make a video about this. It will help many people. Thanks and great vlog!

[@erialettchill]

This is so cool. Great explanation using interesting but relevant side notes and visual

[@MrMaurolandia]

hola como esta. queria saber cual pagina es de confianza para comprar baterías sony. si me puedes recomendar alguna

[@GeneGetman]

I think you shouldve mentioned the distinction between balance charging and using a BMS. You can bulk charge a li-ion battery pack with a BMS, or balance charge a li-ion battery pack without a BMS. but bulk charging a li-ion battery pack without a BMS, even under low discharge rates, would not be recommended

[@MrSummitville]

And yet after 2 years, balancing was not an issue ...

[@CrossfitCarlos]

I can't find a Cell Log 8 that is the same as you got there, are there others you recommend, maybe a video on some different types.

[@wooddawgz1504]

I need help .. lol makita battery’s no matter what, stop charging after about 200 times...but there’s nothing wrong with them.... I had some rebuilt but they show bad when you try charge them... the battery place where they rebuilt them, did some research and found the charger only knows it’s been on the charger 200 times or so so I need just a 18 V lithium ion charger I can just hook directly to the batteries...

[@FretsNirvana]

Another great tutorial ...and a good looking tele on that back wall that I can see.....

[@thotwheels6311]

I too am struggling- I want to use Lithiums where Lipos may outshine them. Car Audio- inside the car with me, I want LifePo4s. But I need high discharge and recharge rates. I have a 370 amp alternator which shoves the juice in and two large amps which are capable of drawing 500 amps a piece. I believe under these circumstances I will still be able to use a Lifepo4. I sure hope so.

[@ronniepirtlejr2606]

you need some supercapacitors

[@g.avivek]

How to calculate the charging voltage and current for the cells that are connected in series?

[@dreadnot427]

This is a perfect video! Your explanation is clear. I have a question. Your example for uneven discharge rates was batteries wired in series. Does the same principal of discharging a cell to the weakest cell apply to cells wired in parallel? Love what your doing. I am newly subscribed. Thanks

[@ntag411]

Good explanation for a obscure subject.