Recent content by ferez21

I think it does have, Iv'e attached a photo of the hub motor disassembled below, Are you saying that i can just go ahead and cover all the internals with spray paint\epoxy? metals\wires\magnets? Most of the corrosion can be seen on the metal leaves (not sure how to call them, like these in a...

So the other day the front wheel of my xiaomi m365 (hub motor) started to get stiff and vibrate during ride. Then in the following rides it started spinning normal, then again stiff in the middle of the ride. Ive opened the hub, and water came out of it as i opened it. The inside was wet, and i...

The cutoff of the controller will affect the auxilliary pack as well?

Is there any cheap component/circuit i can add just to limit the voltage of that pack?

All the controllers from China i look at have an LVC of below 3.0v, so i dont have any other alternative (for my budget)

Hi, I'm building a 10S4P pack for an escooter, and im going to use the BMS in the photo: The BMS low voltage cutoff is rated at 2.8v, which sounds too low to me, how do I make the LVC higher (do i need to add another component)? And what is the recommended LVC? I will mention that this pack...

10S3P LG M26 cells inside my Xiaomi M365 scooter. Btw, many times i see people building power packs with a lot of different cells, like this one for example: Whats the logic behind that? And how can it possibly yield good results?

Wouldn't 2 cells in parallel with different capacities balance each other at their total output together? I vaguely remember something like that being said in electronics class in high school 17 years ago :lol:

great explanation, Just to see if i understand it correctly, with the drain rate aside, i should make the extra pack cells (and total pack wattage) identical in mAh and Wh to the original pack? Then it will use most of the juice from all packs, though max drain rate will still be determined by...

Thanks, Does it matter if the cells in the auxilliary pack have a slightly different voltage/capacity than the original pack? I mean, I'm going to use a BMS, it should just "block" the auxilliary pack once it's drained isn't it?

Hi, I intend to build an external battery pack for my Xiaomi M365 (250W hub motor), to connect in parallel with the existing one. I know the one it currently uses are LG MG1 with a 10A max drain rating, but for that specific application, can I get away with 18650 cells with a drain rate of...

I thought the new Xiaomi powerbank uses 18650, but i was wrong, the 20,000mah version that cost less than 20$ is made of two 3.7v 10,000mah lipos - returning to the original question, you think we can somehow modify it (while eventually keeping them in their enclosures) so we can daisychain a...

Hi all, I'll start with a quote from another thread (sorry cannot remember the person's name): "Iv'e found the Achilles' heel of traveling with an E-scooter. Flights.". As we all know, most airlines limit carrying of spare lithium batteries to 100WH of power. But Iv'e also noticed that most of...

so, any progress with this thing? :)

Hi, Iv'e thought about making a small simple board to help me get into the metro station and back, and one i can take with me to cover small distances when my main board is too bulky to hang with. I need it to be small, light weight, don't have to be too fast (15km/h will be perfectly fine). I...