Recent content by ningaman151

How would I have it so that the electronics shut off when the cell voltage is below 3v?

I'm sorry, after reading where the link leads in the forum, I still don't understand what's going on.

Sorry I don't really follow you; what's wrong with the charger I'm proposing? By 3P14S do you mean 3 14SP1s in parallel? Why would I do that? Also, why would I break up the battery into 7S blocks? Thank you for your time :D !

What? What I meant was batteries in 3p configuration; in my case 14s3p. The charging works by charging each series set of batteries with an isolated buck converter. Edit: I just re-read your post and yeah I have the 14s3p configuration; not 3 14s1p batteries. Cheers.

I linked the video to give an idea of how the charger is set up. I don't care about the other information in the video. What's "SC"?

Thank you for taking your time to reply to me. But sorry I'm confused about some things. I don't understand where the voltage spikes would come from (the chargers are isolated). I don't follow how the mains example relates to the battery charger ,(sorry I'm thick). I would have done your test...

Sorry I don't understand why it wouldn't scale well to larger packs, can you please elaborate? :D

Doesn't the tp4056 terminate automatically, because in that case I can use 3 of them in parallel (because there are 3 batteries in parallel) for each series stage. Edit: the tp4056 terminated charge automatically when the charge current is 1/10th the programmed value.

Hi all I want to build an ebike, and I've been thinking how I'll make the charger. I stumbled across this video: ks2LefmuNZY But in my case my battery would be a 14s3p battery. Same idea, but larger scale. Instead of the tp4056 modules I can use CC CV buck converters for faster charging of...

Eureka! I think I have found it.. What if I use AC-DC converter to step down mains to around 12 or 5 volts for every series part of the battery and using a CC CV buck converter to use the stepped down and rectified voltage to charge the battery stage? A video speaks louder than words: ks2LefmuNZY

I was thinking about using mosfets, which provide the same functionality as a relay (or I might be missing something)

Hi! I haven't been able to test the continuity of the bunch converter's negative terminal, but I have a new idea. What if I multiplex the output of the buck converter to each series stage on the battery? That way only one series battery pack will have power connect it to. Does this look...

Yes, and I feel ridiculous for saying it :lol: . Let me get back to the drawing board and make a new schematic. :D

I'm sorry I think there is a misunderstanding. The ground of the desktop power supply is not connected to the buck converters, only the positive 12V is connected to the (+)s. I know that connecting the grounds shorts the batteries, that is obvious.

What do you mean? The schematic is complete, 12V is a power connection that are all connected to each other. It is a staple in schematic capture software. I can include a connector for the power supply but that's about it, there's no point of putting a desktop power supply in the schematic and...