THis is a great video. I like the harness. Most ebike batteries seem to come with the smaller JST (PH 2.0?) connectors which are different than RC JST HX 2.54 connectors.

I loved your idea of spoofing the RC charger into thinking it had its bulk power cables connected by jumpering to the balance lead's lowest and highest voltage wires. This setup makes it easy to plug in your balance connector anywhere in the series string and balance the covered groups. Many batteries are built with thin balance leads that wouldn't be able to handle much current. It is important to mention that the charge current while balancing needs to be limited so as not to burn up puny balance wires or in your case the internal traces of your voltage monitor which is being used as a makeshift breakout board.

@stevenc22

Жыл бұрын

Absolutely. But I'm not charging just balancing. Super low current.

Holy crap this is what ive been looking for a way to balance a pack thats dead or supposed to be dead because 1 pack of battery drop under the voltage rendering a complete pack van useles im happy with this video this is everything u need to determine if a pack is good a bms is bad ❤❤

Thanks. I have a severely out of balance 42V battery.

Thanks for posting this video. With battery replacements so expensive, it is very useful to know that they can be revived. (Though it looks like I'll have to spend a bit to get the kit to enable that.)

@eXTreemator

Ай бұрын

Even more expensive if you will keep buying any chiensia scrap

@ekim955yt

14 күн бұрын

You're very close to "don't speak English"

@ekim955yt

14 күн бұрын

I credibly frustrating video. You have zero communication skills.

For anyone thinking of doing this with a LiFePO4 battery, remember the flat curve of the voltage between 3.00 and 3.30 means you have to top or bottom balance. Can't play around in the middle and actually get the energy in the cells to be equal

there is BMS with balancing and BMS without balancing and usually they balance at the end of the charging i hope this helps

the higher voltage batteries are in better condition or are the lower voltage cells are the better ones ?? i have a bms with 4 groups having lower voltage than the rest of the pack...anyone ??

One thing though, didn't the cells get out of balance because some are more worn out than others in the 1st place? How long do you think till they get outta balance again? 🤔

bought m9 balancer charger .. hope it does faster!!!!

This may be a dumb question but what are those connectors called?

Hello I have question about an other video. If I have the Bafang BBS01 250W it's a version limited to 25km/h, can I unbridle it to go beyond that?

@stevenc22

Жыл бұрын

Yes. You can actually do it from your controller screen on the bike. You need to access the secret menu. Each screen has a secret menu.

Could a battery pack be balanced just by connecting high voltage battery string via wire in parallel to low voltage sting until the equalize? Doing this manually over and over with the different strings until they are all equalized just using 2wires and a multi-meter?

@stevenc22

5 ай бұрын

Yes. Called active balancing moving voltage from one cell to another

I've just ordered my first electric bike(a recumbent trike actually) and this is exactly what I needed to see. I have an old iCharger 208B that I use to balance my Dewalt batteries with now. I use to fly RC helicopters a long time ago(before the age of drones and autopilots). What is the pin type for making the balance leads? All my stuff is JST-XH, but I can't really tell what that balance tester uses(I just ordered one). Thanks for the great video and help.

@stevenc22

Жыл бұрын

The internal battery BMS uses a ph2.0 pitch pin. The rc chargers use a ph2.5 pitch pin. You can definitely make a cable with ph2.0 on one end and ph2.5 on the other end.

@ericklein5097

10 ай бұрын

The active balancers use thicker cables (because the current is several amps max when the voltage differential is high). If I remember correctly the active balancers use JST VH or VM? and its 3.86mm? something like that

If the Bms allowed the battery to become unbalanced, would it not happen again ? Did the battery perform ok after balancing with the hobby charger ? Are those connectors readily available, should I want to use that monitor ?

@stevenc22

7 ай бұрын

If you charge you battery regularly, the BMS should keep things balanced. When a battery sits for a long time the BMS is not active and the cells will become unbalanced

I can't understand why the bike manufacturer doesn't provide a charger that balances the cells. Obviously it would cost a little more, but my first ebike battery is kapoot after just 6 months. First ride, it lasted pretty good. But every ride after that one it's gotten less and less range. Now I have to crack it open and buy these tools to fix something that shouldn't even be a problem to start with. They probably make more money selling replacement batteries, and just balance/recondition the batteries that go bad, and re-sell them.

How often will you have to balance it out like this ?

@stevenc22

5 ай бұрын

If you routinely use the bike you don't have to do this because the BMS will balance the battery. If you let the bike sit for 3-6 months then things will start to get out of balance and the BMS won't be able to correct

Have you thought about fitting a bluetootrh BMS, so that you can keep an eye on the health of the battery

@stevenc22

Жыл бұрын

Yes but my only concern is keeping the Bluetooth powered will draw energy from the battery, so if you don't use the battery for a couple months the Bluetooth could drain the battery.

@RobertAdams-ly5ku

Жыл бұрын

@@stevenc22 Yes,others have said the same, but would it be possible to install a switch, so that you could turn off the bms when the battery is stored. Great channel by the way, great content.

@stevenc22

Жыл бұрын

@@RobertAdams-ly5ku not really. The Bluetooth is internal of the BMS so no way to turn it off

@RobertAdams-ly5ku

Жыл бұрын

@@stevenc22 Thanks, I didn't know that, as others have said that they were going to install a switch

@offgrid2010

4 ай бұрын

I have a similar situation and a 13s 48-52vdc system. This video is exciting as I have been using a dual 6s RC charger with a cradle system in series that I built, The hours involved are VERY painful so I've been desperate to buy a BT-BMS that provides data and safety to every cell with a phone app. I did not know about needing a switch. I guess an alternative could be setting up a trickle charge.

Could you not just use the charger without needing the $70. monitor ? It seems the only advantage of the monitor is seeing all 13 cell groups at once. Can't you just move the charger to the first 8 cell groups (1-8) then move it to cell groups (6-13) ? Since groups 6-8 have been already balanced then 9-13 would be balanced to match them right ?

@stevenc22

5 ай бұрын

Yes you could, the monitor just makes it more convenient by giving you the pins split out

@kmailarry

5 ай бұрын

@@stevenc22 Thank you for the video explanation. I finally balanced my battery that I had to replace 4 batteries 1S of 13S 48v battery without matching pack voltage. All I used was a 5V phone charger, a usb fan to discharge and my multi-meter to monitor. It was labor intensive and needed constant monitoring of the series of cells being charged or discharged but it worked great.

LG M26....no surprise there...those cells are known to not last

@crispysocksss

8 ай бұрын

They're good legit cells, same as the blue eve cells. I still have 10 scooter packs of m26 from 2018 and they still have max range

Confusing 😊

Ok now do a video with a solution for someone with no skills or equipment.

@stevenc22

3 ай бұрын

My video this afternoon balances a ebike battery with a $20 device, no other tools or equipment!

@mct8888

3 ай бұрын

@@stevenc22 👀you got my attention!

Continue buying chiensia crap batteries and skimp on custom build with genuine batteries...