Charging Blues - Want quicker charges

[markz]

Meanwell HRP-300-24
https://endless-sphere.com/forums/viewtopic.php?f=14&t=87684&p=1285452&hilit=HRP#p1285452

Just wanted to add my MW HRP-300-24 in series (two of them) pumping out 16A into the batteries, is only pulling 5.90A to 6.25A from the wall. I use it to charge 41.5V pack (10S), but it goes up to 60V. The label on the MW itself states Input 100-240Vac 4.5A

Got a question about the quote above.
- I usually charge up at gas stations, sign pylons, mini malls, train stations. If I am pulling 6A at full draw with my MW's at the wall outlet. I should be able to place two sets of MW's on one outlet and get 12A out of the wall outlet. So would those outlets be rated for 15A or 20A?

My ONE built pack is 36V(nom) 41.5V(max) 10S 18Ah and takes 1.25 hours (Ah/A) to charge full.
I want to build a second pack from DB's Makita's and debating which way to go. More Ah, same Ah, charge time.

- I do have a third identical MW. So maybe what I need to do is build my second battery pack so its splittable, 10S 36V (41.5V) 18Ah into 5S 18V (20.75V) 36Ah but at 16A charge would take 2.25 hours. Which is no good, would like to get it down to 1.25-1.50 hours.

This leaves me to.....
SMUN (MW Clone)
25A 24V 600W $75(CAD) Shipped
33A 24V 800W $151(CAD) Shipped
50A 24V 1200W $193(CAD) Shipped

But would they act the same as the MW in terms of CC/CV ?
If so the 25A 24V 600W SMUN looks reasonable. Then I could split a 2nd pack from 36V 18Ah into 18V 36Ah, and take 1.44 hours.

Now I never timed a full charge, all my times were strictly Battery Size (Ah) divided by Charger (A).
But it does seem to take a bit longer then Ah/A. I am usually in a restaraunt waiting and the MW's turn off on their own due to self protection or I come back and the fans have turned down very low.
Has anyone actually times their packs charging time?

A final option is DCDC.

 

[zackclark70]

first thing we need to know is the maximum c rate it can be charged at

 

[markz]

Yes, I think like 1C or 1.5C
Thats what they are currently being charged at, and they are fine.
Also would like lower of course.

SMUN to MW $ diff isnt much, might as well go with tried and true MW.
HRPG-600-24 @ 27A $202
SE-1000-24 @ 42A $230

For the DCDC I got tons of Dell PSU's at 12V 62A, could setup to 12V/24V/36V/48V 62A easily.
https://endless-sphere.com/forums/viewtopic.php?f=14&t=87356&p=1279672&hilit=ebay#p1279672
http://www.ebay.ca/itm/1500W-50A-DC-Boost-Converter-Step-up-Power-Supply-Module-IN-10-5-60V-OUT-15-70V-/252553726589?hash=item3acd600a7d:g:xYgAAOSwCGVX5UUj

^If I use that $80(CAD) DCDC and my Dell 12V 62A PSU, the DCDC needs input of 50Amax 10.5V-60V and outputs 30A 15-70A. Might as well just go SMUN 25A model and split my pack. But what a pain to split the pack to charge. Choices Choices Choices.

 

[zackclark70]

Yes, I think like 1C or 1.5C
Thats what they are currently being charged at, and they are fine.
Also would like lower of course.

SMUN to MW $ diff isnt much, might as well go with tried and true MW.
HRPG-600-24 @ 27A $202
SE-1000-24 @ 42A $230

18ah 40v bulk charge ? 1c is 18A 720w 1.5c is 27A 1,080w 2c is 32A 1,440w

if you went the dc-dc http://www.ebay.co.uk/itm/Durable-1200W-20A-DC-Converter-Boost-Step-up-Power-Supply-Module-8-60V-TO-12-83V-/322324189378?hash=item4b0c04d0c2:g:QpMAAOSwKOJYJMRP
if you had a 2000w 24v psu you would need 4 to get 32A at 40v ( wont work well in the us )
if you had a 1500w 36v psu you would only need 2 and you could charge at 27A no problem

 

[markz]

I gotta drop some big coinages.

 

[zackclark70]

I gotta drop some big coinages.

all you need is 3 12 v 500w server psu in series and a couple of the dc-dc converters you can then set the current and volts how you want

i would not expect that to cost a huge amount compared to a real 1500w charger you never know the unloaded voltage of the 3 psu might hit just over 40v and you wont need a dc-dc ! it would still be a good idea to have a bms if you dont already

 

[markz]

dcdc over 1000W on a single pack, aint gunna happen.
But what you are saying is separate the pack, buy some cheap SMUN switching psu's and buy some cheap 500W dcdc
I gotta think about splitting my pack everytime I wanna charge. I did that with my LiPo's and it wasn't Kosher.

However with my three MW HRP-300-24 I could buy a 4th MW HRP-300-24, put it in series with my 3rd spare MW, getting me two psu's capable of charging two separate packs, on the same outlet, pulling 12A from that outlet. I am seriously thinking about doing that actually. Would work well in so many ways, ultra versatile. Lemme tell you why that is. Having four Meanwell RSP-300-24's allows me to charge 40.5V on up, so I get to charge 10S(36Vnom 42Vmax) and 13S(48Vnom 54.6Vmax) and it allows me to adjust the voltage to 4.10 or 4.15V per cell. Also I can do 60V, 72V and 84V using 3 Meanwells in series. I have no control over the current at this moment, but its all CC/CV so its all good shit. I just wished I had bought 4 not 3 from Teslanv.

Through my research, Doctorbass states RSP is the ideal MW to buy because its so durable and stout. RSP's arent cheap either $200+USD, there is also the PSP model. Now.... if you want high W/cubic-Inch then Eltek is the way to go, but Eltek on 110V is only 1000W (220V is 2000W) and cheap on ebay $100USD. I need 110Vac input because its for charging at Starbucks with my Mega Grande whatever (yeah you can tell I go there alot)

Other then that my research hasn't really come up with much. Old SE model Meanwells that dont current limit, maybe the NES model does, who knows.

Oh how can I forget Justins charger, not as versatile over the wide voltage range. But I am only really doing 36V at the moment. Plan to go to, and stay at 48V for my cruiser, and 72V for my hill climbing beast.

Kingpan chargers are an option.

EM3EV chargers
Luna chargers

The "Shits" would be getting the whole Adaptto lineup. 70A charging coil, BMS, there Eaton PSU is only 900W on 110V.

 

[zackclark70]

dcdc over 1000W on a single pack, aint gunna happen.
But what you are saying is separate the pack, buy some cheap SMUN switching psu's and buy some cheap 500W dcdc
I gotta think about splitting my pack everytime I wanna charge. I did that with my LiPo's and it wasn't Kosher.

However with my three MW HRP-300-24 I could buy a 4th MW HRP-300-24, put it in series with my 3rd spare MW, getting me two psu's capable of charging two separate packs, on the same outlet, pulling 12A from that outlet. I am seriously thinking about doing that actually. Would work well in so many ways, ultra versatile. Lemme tell you why that is. Having four Meanwell RSP-300-24's allows me to charge 40.5V on up, so I get to charge 10S(36Vnom 42Vmax) and 13S(48Vnom 54.6Vmax) and it allows me to adjust the voltage to 4.10 or 4.15V per cell. Also I can do 60V, 72V and 84V using 3 Meanwells in series. I have no control over the current at this moment, but its all CC/CV so its all good shit. I just wished I had bought 4 not 3 from Teslanv.

Through my research, Doctorbass states RSP is the ideal MW to buy because its so durable and stout. RSP's arent cheap either $200+USD, there is also the PSP model. Now.... if you want high W/cubic-Inch then Eltek is the way to go, but Eltek on 110V is only 1000W (220V is 2000W) and cheap on ebay $100USD. I need 110Vac input because its for charging at Starbucks with my Mega Grande whatever (yeah you can tell I go there alot)

Other then that my research hasn't really come up with much. Old SE model Meanwells that dont current limit, maybe the NES model does, who knows.

Oh how can I forget Justins charger, not as versatile over the wide voltage range. But I am only really doing 36V at the moment. Plan to go to, and stay at 48V for my cruiser, and 72V for my hill climbing beast.

Kingpan chargers are an option.

EM3EV chargers
Luna chargers

The "Shits" would be getting the whole Adaptto lineup. 70A charging coil, BMS, there Eaton PSU is only 900W on 110V.

the problem i have with taking a charger out is the extra weight