Electronics > Projects, Designs, and Technical Stuff
Modding old ATX supplies for 3.65v output at high current for LiFePO4 charging
<< < (5/6) > >>
magic:

--- Quote from: tooki on June 29, 2019, 11:07:19 am ---
--- Quote from: fixy88 on June 29, 2019, 11:00:52 am ---It seems like a few people have successfully defeated OCP/UVP on the control IC http://planetimming.com/atx_mod/atx_mod.html http://burnt-traces.com/?p=159

--- End quote ---
For the love of god don’t do this, especially not for lithium charging!

--- End quote ---
Lol, indeed.
You need additional current regulation reacting and slowing down the PSU before OCP activates, not to disable OCP :-BROKE
But that's no longer a trivial mod. Output voltage adjustment is simple, but constant current regulation doesn't exist in those PSUs and would need to be built from ground up.
fixy88:
Thanks for all the thoughts :-) Fear not, even when I'm doing things somewhat on the cheap, I'm very aware of the safety issues around lithium cells. If I manage to get something working, it will have over volt alarms and cutoffs.
wraper:

--- Quote from: fixy88 on June 29, 2019, 10:19:08 pm ---Thanks for all the thoughts :-) Fear not, even when I'm doing things somewhat on the cheap, I'm very aware of the safety issues around lithium cells. If I manage to get something working, it will have over volt alarms and cutoffs.

--- End quote ---
:palm: If you want to get something really working, build proper charging circuit powered from PSU. Not deciding adding 6th feet to a dog if it is still moving after adding 5th feet.
fixy88:

--- Quote from: wraper on June 30, 2019, 03:21:48 am --- :palm: If you want to get something really working, build proper charging circuit powered from PSU. Not deciding adding 6th feet to a dog if it is still moving after adding 5th feet.

--- End quote ---

Facepalm seems a bit harsh - it is common in commercial chargers and batteries to include these safety measures.
wraper:

--- Quote from: fixy88 on June 30, 2019, 09:21:15 am ---
--- Quote from: wraper on June 30, 2019, 03:21:48 am --- :palm: If you want to get something really working, build proper charging circuit powered from PSU. Not deciding adding 6th feet to a dog if it is still moving after adding 5th feet.

--- End quote ---

Facepalm seems a bit harsh - it is common in commercial chargers and batteries to include these safety measures.

--- End quote ---
It's not the point. Point is that adding those things to ATX PSU is like adding 5 and 6th leg to the dog. It won't be easy, and most likely won't work properly anyway. Especially considering you didn't even know they don't have CC.
Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod