Power Supply's server power supply conversion

[studio398]

hi. i just watched a video on youtube of how to take 2 hp server power supplies and convert them to a 25 volt power supply for charging rc batteries. they were hp dps-600pb b. the vid said there was a write up on the rc-help forum, with pictures. would some one kindly provide a link to this write up?

thank you,

pat

 

[Tony]

You bet, the article was written by Gaba and is quite detailed.

Here you go.
Rc-Help - 1000W Power Supply using 2 DPS-600PB, Affordable, Dependable, POWERFUL!!

 

[studio398]

Tony, i received my PSU's and took a close look at them. they are not what was described in the ebay auction, and didn't match the pictures in the auction either. i may have to return them. but, i still may be able to use them. i wanted to run this by you to see if you know whether or not these would work. in your vid, it shows an HP DPS-600PB B. the P/N is 321632-501, GP/N is 367238-501 and the spare number is 406393-001. it also says switching power supply.

on mine it is an HP DPS-600PB B. the P/N is 321632-001, GP/N is 367238-001 and the spare number is 338022-001. it does not say switching power supply. so, the P/N, GP/N, and the spare number are slightly different, and does not say switching power supply. however, it is still a model # DPS-600PB B.

Do you happen to know if these will work for the conversion? i didn't want to take them apart until i knew for sure.

thanks,
pat

 

[Tony]

Can you post some good pictures of the pins as well as the inside where the fuses are that you need to break on one of them? If you don't want to take it apart, that's fine, I will just look at the pins.

 

[studio398]

sure, give me a little time, and i will post them up.

 

[studio398]

sure, give me a little time, and i will post them up.

- - - Updated - - -

ok, first attempt at pics here. hope they came through.

first pic are fuses needed breaking / nipping
nest is ground screw that needs to be removed and insulated
then the pins
finally the label on PSU

thanks
pat

 

[Tony]

Okay, everything looks the same from that PSU and the ones that I have. So test them out. Jump pin 6 8 and 10 with the 120v cable plugged in and see if the PSU turns on. If it does, check the voltage across the large positive and negative posts. It should read 12 volts, or a little higher. Once you verify the voltage, I'm sure you are going to be tired of listening to this thing (it's loud at full speed), so jump pin 4 to pin 8 and the fan should quiet down.

If all of that works out, I would say it should be fine. Below is a diagram of what pins to jump and where. Let me know if this works.

 

[studio398]

thank you very much for your help, Tony. i will test it this weekend and report back. we have a blizzard / nor'easter coming in tomorrow (18"-24" of snow) that will keep me tied up for a few days, and hopefully we won't lose power. yeah, on the 12v out terminals, and for the series connection making 24v, i was planning on using 8 gauge wire. thanks again, and i will report back.

pat

 

[studio398]

so, i ran a quick test this morning, regarding the HP DPS-600PB B with slightly different P/N's. these are my findings:

1. i applied 120v to the main and it powered up, but it was not displaying any voltage across the 12v out terminals. fan wasn't too loud.
2. i shorted out pins 6, 8, and 10 together. the fan was louder. there was 12.49 volts across the 12v out terminals.
3. i shorted out pin 4 to 6, 8, and 10. the fan was noticeably more quiet. there was still 12.49 volts across the 12v out terminals.
4. as you can see in the photos below, the pins being shorted together, and the voltage reading.

i can only assume these must be good results.

pat

 

[Tony]

Yup, that is good. I'm guessing the "non switching" means the fan will run any time the PSU has wall outlet power. Shorting teh pins kicks everything on. I'm just guessing here, I can't remember if mine ran teh fan without shorting the pins.

From here, if it were me, I would kill the ground on one of the PSU's (as shown in the video and article), short the pins as I did (I just bent all of the pins (4 6 8 10) together and soldered them, can't remember if I showed this in teh video or not) and do your series wiring. Once that is done, before you touch the cases, put your voltage meter on AC and put one lead on one PSU case, and the other lead on teh other psu case. If you see any reading, there is a ground short and could be very dangerous. This is going ot be AC current so it's going to hurt if it bites you. Use extreme caution.

But that is what I would do. I would also see if you can find some large heat shrink and wrap the cases in it so that just in case something goes south, you are protected from the current. Again, just another safety measure.

 

[studio398]

thanks again, Tony. i will proceed and report back

 

[studio398]

just an quick update on my project. following the exact instructions on coolgabsi's write up and Tony's video, i successfully isolated the DC ground from the AC / chassis ground. sounds like the instructions work perfectly for this HP model with different P/N. more to follow...

pat

 

[Tony]

Cool deal bro! Now, to get teh charger powered up with them and do a full amp charge!!! That's one of the first things I did lol.

 

[murankar]

I am about a heart beat away from buying my charger and the rest of the misc charing hardware to get mine to 90% complete. I am still pondering on it right now. $250 is a lot of cash to get it to 90% complete, but it will be functional.

Yeah get that on full amp charge rate and watch your charge times drop.

Sent from my LG-E980 using Forum Runner

 

[Kevin W. Ray]

I did the power supply conversion the work great! Thank you for the information!

Kevin W. Ray

 

[Tony]

Hey Kevin, it's my pleasure. I love this setup. Cheap, clean power and works fantastic! And I have punished mine lol.

 

[Kevin W. Ray]

Hey Kevin, it's my pleasure. I love this setup. Cheap, clean power and works fantastic! And I have punished mine lol.

Now I just need a 1000 watt charger1

 

[Kevin W. Ray]

I bent the pins and soldered them together worked great!

 

[Tony]

Yup, that is the cleanest way to do it as long as you do not want the option to flip the fan manually from high speed to slow and just let the temp sensor inside to do it.

 

[Kevin W. Ray]

What is a good 1000 watt charger Hyperion 8 cell charger?
Hyperion EOS 0840I Multi-Chemistry DC Battery Charger (8S/40A/1000W)?

Or

Cellpro PowerLab 8 v2 DC Battery Workstation (8S/40A/1344W) by Revolectrix?

Any options you would recommend?

Thank you!