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I bought it readymade from China.

Thanks

The first bms is 60a. The used one is 100a. Both works with this battery pack size

شكرا، تسلمي

😄

Cells balancing is a key function of the BMS add to that preventing overcharging or over-discharging of your battery cells and there are many features could be based on your BMS choice. The answer simply is yes it’s necessary

Thanks Hazem

Thanks

As long the used cells discharge rate and capacity are capable for your application it will be suitable. Additionally to the used bms too

@@abdelbary8 !!! Will it withstand a 220v 200w load? And how long?

Without knowing your cells capacity and discharge rate and the BMS used additionally to the inverter and how many hours your load required to work i cant answer you even 200w is considered as small amount

@@abdelbary8 !!! Assembly - 21x18650-7A, BMS 25A. How long will it work at 220V 200W?

yes you can charge it as long you gives the required voltage for charging

Thanks Mary

for me I got from the local market ... based on the capacity test its ok with my usage. find yours on eBay, aliexpress, amazon etc.

Thanks Mian

تسلم يا غالي

It will work as they are lithium ion batteries within the board max current

@@abdelbary8 That is what I thought. Thanks for confirming that.

Repairing lithium battery pack could be done by replacing the cells with new. There’s many tricks to refurbish/getting them alive back lithium cells but be careful as that’s risky

This video for you ruclips.net/video/XpAjiCSpOqE/видео.html

Lithium advantage in storage capacity. its important to concern to choose the right cells with specs like discharge rate and the real capacity based on your application

Bangood, Aliexpress, Temu or Amazon

Use your choice ... based on capacity test.

تسلم

تسلم علي ذوقك. امين واياكم

Thanks

Thanks

Bangood, Aliexpress, Temu or Amazon

جزاك الله خيراً يا هندسه. تأكد ان احنا دائما بنتعلم من شغلك الدقه وجوده التصميم من مشاهده ماكينات أوتاد بمختلف الإصدارات

amzn.eu/d/iVJs5Xv

You can use either 12.6v adaptor or multi cell lithium 3s usb type c board

Me too not sure what’s happened 😅. Anyway, I used a low gauge cable and I replace it with better one in an enhancement video for the same project. Thanks for your feedback

What I can imagine is, he is holding that bzel with negative and positive terminals outside. negative terminal is already connected and is pointing downwards while he is trying to route cable through the positive terminal. I guess he touched with negative terminal a positively charged place on naked BMS.

or, the other way around. It is actually negative terminal he is connecting.

I guess so that’s what’s happened 😄 we must be careful when dealing with batteries

@@abdelbary8 true. Very nice video tho. I will use it to make my own battery to power up my sons e-quad. thanks!

I agree with you, insulation paper used to isolate the nickel strips, Thanks for correcting me. Batteries and bms both are Chinese and need to do test on your own as I mentioned in the video. Anyway it’s working and FYI this battery around 1600mah only 😄