72V20Ah60A Lithium Ion Battery Build

Battery pack built to fit Razor MX500, MX650, SX500, RSF650
wiring for JBD BMS SP22S003BP22S60A
Wellgo Bus Bars 0.5mm copper with nickel plated steel

[@norbithehun]

Great job. Thanks for sharing with us. Just 2 minor corrections to prove I was watching carefully 🙂:

[@eastwood111]

Hey Todd! I just wanted to tell you how extremely helpful this video has been for me with understanding my first battery build. I can’t tell you how many times I’ve watched this video lol. Seeing your battery builds and you describing all the details has helped me a lot in understanding all of this. I ordered the WELLGO busbars from Ken, the 1.0 mm for a 28s S 11P Pack. It’s a large battery for my first build but it’s for my Suzuki Rmz conversion. I have a couple of test videos on my channel with the bike but I was just using a 72 V battery for the testing. Can’t wait to see how the 28S battery performs!

[@user-lq3xw8dh4p]

Can you make one of these for a csc city slicker?

[@ovchannelag5238]

👍👍

[@romeinc]

Sold im buying one..

[@eastwood111]

So I’m doing a build with Molicel cells 21700 P42A. Since I’m starting with new quality cells, do you think I should do a self discharge test, like fully charge each cell and check to see if they’re self discharges over Couple weeks? The problem is my battery pack is 360 cells so it would take forever and I’m just not sure if it’s necessary considering the quality of cells I’m using. I plan to check the IR of each cell for sure, but just not sure about the self dain test. Thanks for any input!

[@laurabarnes3295]

Do I need a bms wen I already v pmw/mppt

[@martynwatson4929]

I'm upgrading my factory ebike battery from 2500mah 18650 to the same amount (40) of 5000mah 21700.

[@Seneslau07]

Do you consider problematic receiving new lithium ion cells at 3.44v? I received my new 21700 Samsung INR 40T3 4.000mA, 35A cells with 3.44v. Is that too low? I've builded an 2.8 kw 24s8p battery for an electric paramotor and has a huge voltage drop at 10-17kw full throttle and it should handle it like other similar batteries. I'm trying to find out why. Thanks.

[@eastwood111]

How do the busbars connect the two different packs together or the two different cell walls? Since normally packs are folded with the nickel strip, was wondering, how do you connect this cell busbar, since it cannot be folded?

[@jeffkey5335]

Thermistor diode? thermocouple palladium wire heat makes voltage hold secondary magnetic valve and senses heat like a Sterling seeback peltier effect seeback can freeze from heat and make Electric

[@garydudelston]

FYI: WARNING For anyone using 26650's should be aware that ALL, regardless of brand, contain a 18650 battery inside the 26650 can. I do not know if this is true for the 21700 battery. I did not have any to open. The 26650 battery is Chinas biggest lithium scam ever. If someone wants to open a 21700 to see if they also contain a 18650 i would really like to know.

[@ulimacha]

Is it dangerous to touch 72V?

[@glenluyckx12]

Nice busbars, alibaba supplier?

[@ericklein5097]

I am still rather skeptical of using nickel plated steel being used as a primary contact material. I've done some testing of pure nickel and then placing a pure copper bus bar under the nickel to simulate a battery that has pure nickel spot welded to the battery and then copper soldered to to the nickel. I'm only seeing a 25% decrease in resistance. For example using a 0.15mm thick x 8mm wide piece of nickel thats about an inch long I'm getting an AC IR reading of 1mΩ. Placing the copper bus bar below it (3mmx20mm) and measuring the at the same spot (the ends of the nickel strip) I'm getting an IR reading of 0.760mΩ

[@deone-entity3935]

How to diy charge 50 batteries?

[@oldmanebikes8392]

Do you make to sell? How much if you did sell 1

[@Bboychronicals]

I’m looking for a battery for my bike could you give me a quote if you can make one for me. Thanks.

[@OregonCrow]

Are you selling these?

[@erwinrapanut6692]

How much