Part2b/2 How to make a 4s Li-Ion battery from 18650 cells, DIY tutorial.

[@MyOwnCrusade]

Your welder looks like a spider going through a tough break up. He is still at work getting it done, though, and i respect that. Hang in there, bro.

[@arielelijah1282]

How to connect to a 4s bms for DIY powerbank?

[@Cephas2904]

This is a 4s2p config right? The diagram shows otherwise

[@egtreadway4232]

IM building this same battery pack for a rc plane, what gauge wire do you recommend , sorry cant tell watching video. thanks for any advice

[@maixechrys6264]

15:44 Rule of thumb will be 10% above the maximum amperage that the battery can deliver (its burst C rating). I believe that since rc planes dont consume much current you should be fine with 14awg or 12awg.

[@egtreadway4232]

Ok thanks, thats a big help my planes fly around pulling 6 to 10amp but on full throttle and during launch I see 30 to 35 amp draw

[@mikehalvorsen4788]

Hey. Can you build your battery pack on a upward scale? Like 4 , then 4 on top and then another 4 on top etc.... let me know and how. Thanks 😎👍🇨🇦

[@maixechrys6264]

Hello thanks for stopping by, what is the required voltage (3s,4s or more)?

[@mikehalvorsen4788]

What I'm trying to accomplish is making a homemade scooter and hiding the battery packs in a " dummy" frame. I want to have maybe three steel cylinders with the batteries incased and attached together. It will be a set of four on-top another four, upward. My question is how would you a joint the batteries going upwards?

[@starlord8200]

Why you connect balance port without PCB?

[@milesmoore5422]

So it does not matter where the BMS wires are located on the battery ?

[@alfredbriffa1692]

How is it you did not fix thermister or temperature sensor, please

[@MyspiritMysoul]

Can you show how we can make a 14.8V pack of 4 cells (use only 4x18650 and set them on a series raw) using balancing connectors and have them tested in an Imax b6?

[@maixechrys6264]

Απλα χρησιμοποιησε τις πρωτες τεσσερις μπαταριες και ενωσε τα θετικα του συνδεσμου ισολογισμου στα 4 θετικα των μπαταριων οπως απεικονιζονται στο 0:39.

[@moturcu4226]

Best battery videos on youtube! Thankyou

[@maixechrys6264]

Glad to know it helped!

[@garrettmcfarlane1901]

Well demonstrated and explained. I could follow every step.

[@neilgahapon3310]

What charger do we have to use? Is it okay to use Lipo balancer charger? Pls notice🙏

[@maixechrys6264]

Well no the charger has to have a Li-Ion option, voltage ranges are not the same.. I mean it could be done but expect funny results in a few charges!

[@neilgahapon3310]

@@maixechrys6264 so what type of charger can I use?

[@maixechrys6264]

@@neilgahapon3310 Any charger that specifically states it supports Li-Ion batteries. Whould you like a link.

[@neilgahapon3310]

Okay thank you

[@gargolaconrad3188]

Wouldn't this be an 8s battery since you are using 8 - one cell batteries? I see other 4s Li-ion packs with only 4- one cell batteries.

[@maixechrys6264]

They are connected differently(series/parallel) please watch part one to get a better understanding.

[@gargolaconrad3188]

@@maixechrys6264 OH OK, I'll watch part one, thanks. I'm just learning about battery packs.

[@maixechrys6264]

@@gargolaconrad3188 no wories mate my bad I hadn't put a link.

[@missiletm]

Great explanation. One tip for you, get some flux, it will make your solder flow much better requiring less heat and stronger bonds. A couple of your joints looke like cold joints which are a lot weaker. 👍

[@maixechrys6264]

Always appreciate helpfull feedback for improvement, I ll give it a go thank you!

[@chongshenchang9367]

Sir, can we mix cells of different mAh in Lithium pack..??

[@maixechrys6264]

No, it is not possible and it is very dangerous if you do so.

[@chongshenchang9367]

@@maixechrys6264 Ok. Thanks.

[@maixechrys6264]

@@chongshenchang9367 thank you, please make sure you watch part 1 and 2 as they cover anything you need to get started.

[@chongshenchang9367]

@@maixechrys6264 Ok Sir..

[@__-hh3gt]

Dramatically fantastic. Thanks

[@omaralvarado1080]

That is great, but it’s better if they are spaced out

[@strawhat.eth.]

Helo can somebody help me i have a question i have a ebike 240watt motor the standard battery is a 24v 10amp now i want new battery en i see 18650battery of 10 to 35 amps can the bike handle 35amp battery (i need a 7cells battery en wand to put in itch cell 6 battery that makes 3.7v itch cell en total of 24v 30amps)

[@sphamandlas.madlala6530]

It should be fine with a proper BMS, the motor will draw the current it requires from the battery i.e. 10amps at 24V. keep in mind that the motor will draw current to it maximum power which in your case is 240watts, what im implying is, as the pack voltage decreases the amount of current the motor draws will increase hence why you will need a proper BMS to protect the pack.

[@maixechrys6264]

@@sphamandlas.madlala6530 Sorry for the late reply as long as the voltage is the same as the stock battery and the amp draw does not go beyond the capability of the battery (C rating) everything is fine. Hope you already figured out a solution by now, please share if your project worked!

[@tonymontagnard1597]

14,15 volts total 3,7v x8 = 29,6 volts why only 14,15?

[@maixechrys6264]

Hello thank you for your question. So assuming you are reffering to the thumbnail photo that is depicts a pair (2) of batteries connected in parallel, each pair consisting of 4x3.7 volt cells so a total of 8 seperate 18650 batteries for both packs. Each of the 4x18650 batteries (a single pack) are connected in series, the voltage is the sum of the batteries included in the pack (4x3,7v=14.8v) and the capacity is the same. (assuming the nominal voltage of each of the 18650 batteries to be 3.7v, unless you want the min 2.9v rating or max 4.20v) Vice versa for the parallel connection between the two packs that give no increase in voltage but doubles the capacity. I hope this clarifies the issue but if this is not what you meant please tell me what is the schematic you are reffering to in the timeline. Stay safe!

[@maixechrys6264]

Also please make sure you have watched the previous videos in the series Part 1 kzbin.info/www/bejne/f3jdZmqIi7OhhsU Part 2a kzbin.info/www/bejne/Y5_TfYSDZ56HrJo

[@bulldogpatje]

Very Very Good explenation

[@steliostheofanou1368]

ωραιο βιντεο μπραβο αδερφε

[@maixechrys6264]

Ευχαριστω πολυ!

[@m3chanist]

Your schematic doesn't match the battery as built, luckily. It doesn't show the parallel connections of the middle two cells in each 4S section, only the outer two of each. If it was made according to your schematic those cells wouldn't be balance charged and would end up as a disaster fast.

[@marbella-elviria]

Is this for children who start learning English?

[@maixechrys6264]

Care to elaborate further?

[@ganesh-Chennai]

Hello friend, I think you're messing up with your battery. Li-ion cells must not be exposed to long duration heat..you see, it destroys the capacity of the battery.

[@maixechrys6264]

Yes, long duration heat should be kept to a minimum.

[@maatiraouki5183]

👍✌️❤️

[@vikasshukla85]

👍🏿🙏🏾vjppjio

[@alex13261911]

Total wrong,every battery pack need a BMS 😢😢😢

[@maixechrys6264]

Its good to have, not a must please don't missinform. Tons of batteries exist in the market without bms. Even lipos, do you think a phone batery caries a bms?!