EZGO Powerwize QE Charger, repurposing

Thread Starter

skeer

Joined Oct 28, 2022
134
Hey there! Ok so I have an EZGO Powerwize QE charger.. picked it up because it 'didn't work' at charging batteries. And that's pretty much all the info I have.
My intention is to use this as a 36v power supply, I have a couple low geared DC motors in the shop I'd like to do things with. At any rate, since I do not have a variac I used a DBT and plugged it in.. surely enough nothing happens. According to the manual the battery sense "should" determine on/off state. Since I'm not charging batteries I'm thinking perhaps bypassing that and hot-wiring it to just be on all the time.
Hardware details:
Delta-Q Technologies
model 470-0010 Rev11


So far the fuses test good, the rectification circuit is outputting ~110vdc. I do not have nor know how to use an O-scope.. only the trusty fluke 179.

I did look up how others have 'converted' smart battery chargers into dumb (old-school) ones, some mention bypassing/removing/shunting the output relay. This has one but I suspect the battery sense is not the only function the board relies upon before flipping the charge switch.

There is a spot (see first pic) where it appears two diodes and a resistor were removed after the board was coated. I do have another board with the same model/rev but a different C49 setup that has the two diodes and resistor there. On this one there was obviously something there when it was poly coated.. surely a QA check or engineering change would not have altered the board after the fact right? There's no evidence this was opened or messed with previously but there's no way to prove it. The last pic is the other dead board with the missing components.
 

Attachments

Top