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help identifying this Aliexpress cc/cv addon module they put on server psu's

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bigjoncoop:
Recently on AliExpress, eBay, etc... I've been seeing these lithium ion battery chargers consisting of a server power supply normally an HP DPS-750/1200 or very similar and they have a module connected on the outside which must be a CC/CV controlling device...

They're littered all over AliExpress. I searched all over Google and github and I can't find anything similar whatsoever.

I've also looked for the module itself for sale anywhere but can't find anything.

I was just able to find a picture of the internals and the PCB. It looks fairly simple. 1 IC, and a couple pots....

If anyone understands how this thing is working or know where to find any information or where to buy one please leave a comment below.




ledtester:
My sleuthing of the image points to the power supply being a Liteon PS-2751-5Q:

https://www.empowerlaptop.com/p/ps-2751-5q-f3r29/

The electronics looks so simple that I would hazard to guess that the power supply itself has some form of CC control via a control voltage and the box just allows you to set it.

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