ET#29. Vax One Pwr Battery Strip Tear Down Two Lights Fail Mode Fault Basic Analysis 18650 21700

[@lowrider692000]

dont have a link for the new BMS do you please be interested in seeing if it fixes it it would be the only video out there I know I searched for ages lol

[@ECEtek]

I just bought a BMS I thought might be suitable from AliExpress and have made some inroads into getting it fitted. I just need time - life gets in the way. It will probably work at charging the batteries. It may not work when on the vacuum because two of the inner connectors on the battery pack are marked rx and tx. This implies some comms from the battery to whatever it might be plugged into. There are a couple of LEDs on the charger unit that indicate battery state (i.e. good bad etc.). It would be great to think that the charger did some form of battery analysis - but that would be economically stupid. I suspect the original BMS is sending some form of signal out that something cheap and cheerful in the charger interprets and operates the LEDs accordingly. If I was Vax, I'd use that same system to signal to the device the battery is plugged into, what the state of the battery is. I strongly suspect that because this substitute BMS won't do that, the device I'm trying to power (a hand held vacuum cleaner in my case) is going to just refuse to work - because it isn't getting the required signal. This is just a guess from a world weary and cynical engineer though! I'll try and get something done this weekend!

[@lowrider692000]

be interested to hear how you get on please there are alot of people out there with BMS problems on these batteries you would most likely get a lot of views if you remake a video on how you do it@@ECEtek

[@ECEtek]

Check out video ET#32!

[@galaxyb1103]

Hi, have you managed to fix this battery? Cheers.

[@ECEtek]

I have a new BMS - just not fitted it yet. Watch out for upcoming video. Haven't tried it yet, so whether it will work or not ... your guess is as good as mine!

[@ECEtek]

Check out video ET#32!