Configuring a Meanwell 84V charger

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Kingfish
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Configuring a Meanwell 84V charger

Post by Kingfish » Jun 24, 2010 6:02 pm

Greetings –
I just need a sanity check as I wire up my new Meanwells to create an 84V 13A charger.
Meanwell84V_charger.jpg
Proposed Meanwell wiring
Meanwell84V_charger.jpg (52.09 KiB) Viewed 1921 times
  • VAC comes in on the right.
  • Meanwell SP-320-48 Qty-2 in parallel
  • Meanwell S-350-27 in series, taking the +V from the 320s and routing it to the –V of the 350
  • Use the +V from the 350 and the GND to charge the battery array via the BMS.
  • The –V from the 350 would essentially not be used.
  • 320-48s are trimmed to +54V, and the 350-27 is trimmed to +30V.
Does this look correct?

Thanks, KF
* My 2WD Garden Wall
* Kinaye MotorSports
* Primary ride: 2WD Disc 9C 2806-equiv / Dual Lyen 12FET / 20S7P LiPo.
* Epics: Going to California: 2011 8)
* 50-mph, 101, 10k-Club. 12,527 miles-to-date, 7037 as 2WD.

It is by caffeine alone I set my mind in motion.
It is by the beans of Java that thoughts acquire speed.
The hands acquire shakes, the shakes become a warning.
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Re: Configuring a Meanwell 84V charger

Post by andreym » Jun 24, 2010 11:57 pm

Kingfish wrote:Greetings –
I just need a sanity check as I wire up my new Meanwells to create an 84V 13A charger.
Meanwell84V_charger.jpg
  • VAC comes in on the right.
  • Meanwell SP-320-48 Qty-2 in parallel
  • Meanwell S-350-27 in series, taking the +V from the 320s and routing it to the –V of the 350
  • Use the +V from the 350 and the GND to charge the battery array via the BMS.
  • The –V from the 350 would essentially not be used.
  • 320-48s are trimmed to +54V, and the 350-27 is trimmed to +30V.
Does this look correct?

Thanks, KF
It looks correct becides you should take -VDC from lower sp-320-48 supply -V.
As soon as sp-320-48 are hiccup type, be sure that your S-350-27 are true CC\CV.
In that case it will work fine.
One more thing you could worry is higher than 100% CC current of s-350-27
check it out - if the current would be too high you might want to trim it down a bit by cutting\resoldering one of shunts inside (if you have 3 you can just cut one, if you have one you will heed to re-solder it with similar but higher resistance)
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Re: Configuring a Meanwell 84V charger

Post by GGoodrum » Jun 25, 2010 1:40 pm

Andrey is right, the negative pack connection goes to the DC V- on the bottom unit. Is this for a 20s LiPo setup?

Gary

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Re: Configuring a Meanwell 84V charger

Post by Kingfish » Jun 25, 2010 2:10 pm

Meanwell84V_charger-corrected.jpg
Corrected!
Meanwell84V_charger-corrected.jpg (52.23 KiB) Viewed 1870 times
Gary: Yes, 20S LiPo
Understood; makes sense. This look correct? (kinda messy, sorry)

Many thanks! KF
* My 2WD Garden Wall
* Kinaye MotorSports
* Primary ride: 2WD Disc 9C 2806-equiv / Dual Lyen 12FET / 20S7P LiPo.
* Epics: Going to California: 2011 8)
* 50-mph, 101, 10k-Club. 12,527 miles-to-date, 7037 as 2WD.

It is by caffeine alone I set my mind in motion.
It is by the beans of Java that thoughts acquire speed.
The hands acquire shakes, the shakes become a warning.
It is by caffeine alone I set my mind in motion.

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Re: Configuring a Meanwell 84V charger

Post by mwkeefer » Jun 25, 2010 3:11 pm

Still not right for all 3 in series - I assume your going to turn down the voltage on all 3 so they max at 83.x when in series?

It should be crossed again on the last unit, the ground i mean.. at one end (bottom of stack) pull GND (-) off as an output line then connect the + positive of that meanwell on the bottom to the GND (-) of the one above it, then the one above it gets it's + connected to the final unit's negative and you pull the + postivive charging lead off the last.

So you end up with all 3 in series and Ground coming from the bottom unit, VCC or Positive coming from the top unit.

The current will limit to approx 125% of whatever the S-350-27 would output so you need to do:

1.) Set desired (lowest) output voltage from the S-350-27
2.) Fan mod - replace thermistor with resistor so fan on S-350 comes on always
3.) Adjust current output via shunts or resistor R33 on the S-350-27

That should get you working reliably and quickly :)

Hope it helps!
-Mike
Regards,
Mike

{My Rides]
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Re: Configuring a Meanwell 84V charger

Post by Kingfish » Jun 25, 2010 3:28 pm

mwkeefer wrote:Still not right for all 3 in series - I assume your going to turn down the voltage on all 3 so they max at 83.x when in series?
<snip>
Mike, it's two 48V in parallel + one 27V in series, voltages bumped to equal 84V max. Currents are matched with the S-350 attempting CC.

However - I plan to use Goodrum's CC charger device so that should be managed.

Clear as mud? :wink:
* My 2WD Garden Wall
* Kinaye MotorSports
* Primary ride: 2WD Disc 9C 2806-equiv / Dual Lyen 12FET / 20S7P LiPo.
* Epics: Going to California: 2011 8)
* 50-mph, 101, 10k-Club. 12,527 miles-to-date, 7037 as 2WD.

It is by caffeine alone I set my mind in motion.
It is by the beans of Java that thoughts acquire speed.
The hands acquire shakes, the shakes become a warning.
It is by caffeine alone I set my mind in motion.

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Re: Configuring a Meanwell 84V charger

Post by mwkeefer » Jun 25, 2010 3:34 pm

2 in LPT and then Series with the 27v, yep diagram is right.

Even with the charge controller, I'd mod the 27v for the fan and proper current before connecting them all together to a pack.

-Mike
Regards,
Mike

{My Rides]
2010 Dahon Jack - GNG v1 - LYEN 6FET - 20/40A - 18S2P10AH - Nom:66.6v,1332w
2004 Hard Rock Pro Disc - Recumpence ms eDrive v4 - Astro 3220 4T - 12S2P16AH - HV110 - Left Side Drive - Gearing: 38mph
Nominal Peak Power @ 60 seconds: 5328 watts - Maximum Power: 49.8v, 120A, 5872w
2010 Downtube 8FH - Stock GNG v1 Stock Controller - EB809XC - 12-16S
2012 Downtube Nova 7spd - Stock GNG v2 - 12S2P10AH - EB809 - 12S-16S - 20A/30A,Nom VCC: 44.4, 888w

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Re: Configuring a Meanwell 84V charger

Post by GGoodrum » Jun 25, 2010 3:41 pm

Mike is right, I'd do the current mod on the S-350-27. The Charge Controller doesn't kick in until the cells are nearly full. The current limit mod is a 5 minute task. You simply tack on a 2K resistor to R33, assuming it is in the same place as for most of these.

-- Gary

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Re: Configuring a Meanwell 84V charger

Post by Kingfish » Jun 25, 2010 3:50 pm

Man, I'm nearly on the way to Radio Shack, can you tell me exactly what do I need?

2K at what wattage?
ES-Link??
* My 2WD Garden Wall
* Kinaye MotorSports
* Primary ride: 2WD Disc 9C 2806-equiv / Dual Lyen 12FET / 20S7P LiPo.
* Epics: Going to California: 2011 8)
* 50-mph, 101, 10k-Club. 12,527 miles-to-date, 7037 as 2WD.

It is by caffeine alone I set my mind in motion.
It is by the beans of Java that thoughts acquire speed.
The hands acquire shakes, the shakes become a warning.
It is by caffeine alone I set my mind in motion.

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Re: Configuring a Meanwell 84V charger

Post by GGoodrum » Jun 25, 2010 4:03 pm

Kingfish wrote:Man, I'm nearly on the way to Radio Shack, can you tell me exactly what do I need?

2K at what wattage?
ES-Link??
1/4W or 1/2W

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Re: Configuring a Meanwell 84V charger

Post by Kingfish » Jun 25, 2010 4:16 pm

Right; I'm away!
Thanks gentlemen :wink:
* My 2WD Garden Wall
* Kinaye MotorSports
* Primary ride: 2WD Disc 9C 2806-equiv / Dual Lyen 12FET / 20S7P LiPo.
* Epics: Going to California: 2011 8)
* 50-mph, 101, 10k-Club. 12,527 miles-to-date, 7037 as 2WD.

It is by caffeine alone I set my mind in motion.
It is by the beans of Java that thoughts acquire speed.
The hands acquire shakes, the shakes become a warning.
It is by caffeine alone I set my mind in motion.

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Kingfish
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Re: Configuring a Meanwell 84V charger

Post by Kingfish » Jun 28, 2010 1:57 pm

With S-350-27, I applied the mods to the Thermistor (1k POT in parallel), and 2k ohm resistor in parallel to R33.

I don’t notice buzzing per se. When the fan comes on it drags the voltage down to 13V and the voltage trim POT cannot overcome this. Once the fan shuts off then I can trim to my hearts’ delight.

My workaround is to remove the top cover altogether and be done with the silly fan :?

The rest of the assembly went well.

Have I missed something? I thought I bought a 350W PSU at rated voltage. What gives? :|
~KF
* My 2WD Garden Wall
* Kinaye MotorSports
* Primary ride: 2WD Disc 9C 2806-equiv / Dual Lyen 12FET / 20S7P LiPo.
* Epics: Going to California: 2011 8)
* 50-mph, 101, 10k-Club. 12,527 miles-to-date, 7037 as 2WD.

It is by caffeine alone I set my mind in motion.
It is by the beans of Java that thoughts acquire speed.
The hands acquire shakes, the shakes become a warning.
It is by caffeine alone I set my mind in motion.

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