Did you manage to get it going? The BMS needs to see power on the output side to turn on, and some smart chargers won't apply power if there isn't sufficient voltage. Apparently the BMS powers itself off of one of the cells, so if it sits too long that cell can drop below safe voltage and the whole thing shuts down. I've had good luck getting cells working again unless they are well under 1V.

@PlatimaTinkers

Жыл бұрын

Hey I found a solution but just have not gotten there yet! I thought the BMS may be the issue, but at a lower level. I had charged all those cells up to nominal and confirmed the series and parallel connections were all good before trying to use it. Stay tuned and see my solution in a few weeks when it's not a million degrees in my shed hah. Cheers

@KSCPMark6742

Жыл бұрын

@@PlatimaTinkers Thanks, I'm also hoping for an update 👍

@PlatimaTinkers

Жыл бұрын

@@KSCPMark6742 Roger that mate, will bump it up the schedule!

@BajaWam

7 ай бұрын

Were you able to get it working ? I have the exact same problem and no luck :/

hi. Did you manage to fix the bms?

@PlatimaTinkers

3 ай бұрын

Nah it seemed like the IC was busted. Ended up finding a replacement knockoff one on AliExpress for about $15 though, and just re-built it with the same batteries!

@TulaLexx

3 ай бұрын

@@PlatimaTinkers Could you give me a link? I couldn't find something.

@PlatimaTinkers

3 ай бұрын

@@TulaLexx Yeah but take it with a grain of salt, as the quality varies and this was a while ago. Plus: CAUTION. The link for the battery pack was www.aliexpress.com/item/1005004639263509.html. My memory issue is that I also got a knockoff 9Ah at the same time from some other shop, and one of them works well, but one of them overheats and cuts off after a minute or so of use... I do not recall which is which, but it could even just be a dicky NTC. Could be worth grabbing an alternative model like www.aliexpress.com/item/1005005219176048.html at the same time. Note that having a mini spot welder for the 18650 attachments (I have this one: amzn.to/49Xvr64 - affiliate link, I should actually make a video on it though as it works well) and some hand soldering is required. If you get the instructions wrong it can also let out the magic smoke. If you don't have electronics experience a genuine replacement is likely the way to go! Good luck

@TulaLexx

3 ай бұрын

@@PlatimaTinkers Thank you. I have everything, I am repair batteries. I use SUNKKO 738AL welder.

@PlatimaTinkers

3 ай бұрын

@@TulaLexx Absolute ripper, sounds like you're good to go then!