Found adjustable CCCV charger

[auraslip]

NOT King Power - they are made by KING PAN

Don't know why Ping started calling them that, but you can only find them on alibaba by looking for King Pan. And these chargers are not only $12. Even direct from King Pan in bulk they come out to around $50 a piece.

[Spacey]

I've been using these chargers for nearly a year. bulk charging my Lipo setup to 4.1v a cell using one and balancing once a week.

So much cheaper and quicker than those damn RC chargers that I now only use to balance the pack.

[Hillhater]

.... these chargers are not only $12. Even direct from King Pan in bulk they come out to around $50 a piece.

who mentioned $12 ?
the prices vary depending on the power rating, but on the BMS site they list a 400W charger for $40 ( + shipping)
A 120W unit is $16
Is there is a better value charger available...with adjustable voltage range... ?

[parabellum]

I could go down to 48.52 V, after that trimmer starts to click not allowing going further.

The middle positioned trimmer is for Amp regulation, I have adjusted it to 3.5Amp (it goes higher, but it makes buzzing/vibrating sound already), transistors stay cool but the trafo and coil after 30 sec got to ~60C and surprisingly stood almost there after few minutes. Amp scale is jumping a little from 3.3A-3.8A (it was very stable before on 2.5A). So I am getting about 170~180W to the battery.

Will try to let it charge at 3.5A for few hours tomorrow and will monitor the temperature outside with closed cover for tunnel the cooling air, have no discharged battery now. If it blows at least we know it can’t take it.

Ah, the last trimmer is not doing anything I can notice with or without load.

who mentioned $12 ?

I mentioned that, but have no proofs because order details are not available on this site and I failed to prt sc it. If you observe items on this and BMSbat.... site you will notice prices going up and down or despairing with comment call for prices. I purchased few smart BMS for 29...U$ each, it was 22...U$ in 2 days. Programming adapter was 199U$, 2 days later Special price 99U$.

[Hillhater]

I could go down to 48.52 V, after that trimmer starts to click not allowing going further.

so yours only has a 15v range ?? ...odd bearing in mind a previous post...

I have on off the chargers that have a label with various voltage marked and a check mark at 43.5 V, I opened it up by removing the end srews (4 per side) and the top of the aluminium cover lifts off. The voltage trimmer is near the panel fuse, It adjust to all voltages that are marked on the case. it is a lot like Lyens DC/DC trimmer pot.

[parabellum]

Just giving the picture like it is. On the 3rd pot I only did 1.5 rev in each direction. maybe there is still hope?

From other side.

The voltage trimmer is near the panel fuse, It adjust to all voltages that are marked on the case. it is a lot like Lyens DC/DC trimmer pot.

1)What voltages are marked on the case?
2)What is the lower and higher limit?

[parabellum]

Just giving the picture like it is. On the 3rd pot I only did 1.5 rev in each direction. maybe there is still hope?

From other side.

The voltage trimmer is near the panel fuse, It adjust to all voltages that are marked on the case. it is a lot like Lyens DC/DC trimmer pot.

1)What voltages are marked on the case?
2)What is the lower and higher limit?

Edit:
If it is the GW36 line voltages in specs under this link. http://www.elifebike.com/peng/iview.asp ... D39U.690NW
Then we are in the same boot.

[Spacey]

F inside - voltage adjust.jpg

(124.07 KiB) Not downloaded yet

This was the picture I was given from King Pan the company that make these, this is from the 900W version. On one of the smaller 400W version chargers I added a 10K pot instead of one of the 20 turn pots in the charger, this gave me a much greater range of voltage..... but you can only go within a certain range of the transformer.

[parabellum]

I think putting adjustable 0-10K in parallel will do the trick and I will be able to fine tune it to. Need to measure min and max R value of this trimmer first.

[auraslip]

If it has 3 trimmers and one controls voltage and one controls amps, then one controls the CC setting. As in, when the charger shuts off. When the current at the end of the charge drops to a certain point the charger shuts off. IIRC it's usually set to 1/10 the charge rate.

BTW, I totally blew up my 48v ping charger by turning the voltage output up too high! Be careful!

WRT to the price - These chargers ARE the only real option for us. Unfortunately the high shipping price makes it a bit of a pain. I'll be ordering a bunch of them in bulk in a few months to help save on shipping.

[parabellum]

Charger never shuts of, only thing shuts of is ventilator and red LED (at some point ~0.3A), current still flowing till CV limit. Think the led color change (to green) is for user know it is charged (or almost).
Aura, you are cool, look at your LED tread, have some comm..

[auraslip]

Yeah, LEDS in a hub motor is retarded. I made that thread after seeing the new tron movie.

I just checked on when the charger should shut down. Typically at 20/C at the CV point. Usually by the time you get to the CV point current drops to nearly nothing anyways.

[Demosthenes]

Anybody know what the switch on the 900W version does? There is a power switch on the back that's obvious but the switch on the front I'm not sure what it does. All I know is I managed to stupidly break it while opening the case to find the pots. I didn't even get a chance to turn it on for the first time

[PetriK]

I have had one of these too for some months and have used the voltage adjustment to optimize the volts for my pack depending on the need.

Only today found this post, so:

The middle adjustment you say is charge current ?

And the third is for ?

[parabellum]

I have had one of these too for some months and have used the voltage adjustment to optimize the volts for my pack depending on the need.

Only today found this post, so:

The middle adjustment you say is charge current ?

And the third is for ?

I have not seen any change by manipulating 3rd pot, in loaded and unloaded state. Maybe it is just to set point of red led and ventilator go off and green led=charged indication goes on.
I also tried 1 charge cycle at 4A, transformer gets to 80+C, housing goes to 50C and it starts to stink a little. I think 3.6A is kind of reasonable limit at 50V.

[Floont]

I'm looking at a similar charger at http://www.bmsbattery.com/alloy-shell/28-alloy-shell-900w-lifepo4li-ionlead-acid-battery-ev-charger.html
My 30s3p pack of Lipo calculates out to 111volts at the flat 3.7v part of the battery curve, but when I charge them I need to go to 4.15v per cell which calculates out to be 125volts for the charger.

I'm curious if the trim pots in the charger has enough range up or down from their nominal voltage to get me to the voltage I need. Or will they just send me a charger that puts out 125VDC. Also, I have this fear of over-charging them accidentally if it trickles current after they've reached the set point voltage.


Also, the shipping is almost as much as the product!

[parabellum]

I'm looking at a similar charger at http://www.bmsbattery.com/alloy-shell/28-alloy-shell-900w-lifepo4li-ionlead-acid-battery-ev-charger.html
My 30s3p pack of Lipo calculates out to 111volts at the flat 3.7v part of the battery curve, but when I charge them I need to go to 4.15v per cell which calculates out to be 125volts for the charger.

I'm curious if the trim pots in the charger has enough range up or down from their nominal voltage to get me to the voltage I need. Or will they just send me a charger that puts out 125VDC. Also, I have this fear of over-charging them accidentally if it trickles current after they've reached the set point voltage.


Also, the shipping is almost as much as the product!

my trim pot managed to go from 48.52 V to 63V (I did not tried more because of caps limit). It was as requested preset to 50.4V.
BMS battery has very rare shipping policy and time and offer to change shipping method or paying more after 1 week after order just killed me. Have 10 more of this chargers on the way, not from BMS.

[Floont]

I'm looking at a similar charger at http://www.bmsbattery.com/alloy-shell/28-alloy-shell-900w-lifepo4li-ionlead-acid-battery-ev-charger.html
...
Also, the shipping is almost as much as the product!

my trim pot managed to go from 48.52 V to 63V (I did not tried more because of caps limit). It was as requested preset to 50.4V.
BMS battery has very rare shipping policy and time and offer to change shipping method or paying more after 1 week after order just killed me. Have 10 more of this chargers on the way, not from BMS.

Can I get an identical charger as the one above from another source without buying 10?

[parabellum]

Can I get an identical charger as the one above from another source without buying 10?

I got all my packages from BMSbat at the end so do not worry, but http://www.elifebike.com stuff came to my door before BMS has even managed to send my order (ordered on same day).
Steven Deng is also very responsive, answering very quickly, if you have some questions. He also seams to understand English.

[Floont]

...He also seems to understand English.

That's the biggest I have with dealing with Hobbyking, alibaba, and others. They speak a form of English, but I'm unsure if they really understand me or if I am understanding them. That's why I like it when there are people like Ed Lyen around. He speaks English perfectly and Chinese.

Back on topic: I'll likely give it another couple of days to see if there are any other comments before I purchase that charger from BMS. Thanks for your insight!

[parabellum]

Floont, how many W are you looking for?

[Floont]

Floont, how many W are you looking for?

I was looking at 900W, but that is probably too low for a 30s3p LiPo pack.

[Floont]

I have changed the cart on BMSbattery.com to a 2000W 125VDC charger, so I can get a 10amp charge.

I don't want to spend my waking hours waiting on LiPo batteries to charge.

[parabellum]

I have changed the cart on BMSbattery.com to a 2000W 125VDC charger, so I can get a 10amp charge.

I don't want to spend my waking hours waiting on LiPo batteries to charge.

You know, your 120V sockets are 1650W max and it seems not to be underrated. I have successfully melted 2 sockets at home by connecting portable Air Conditioner 1600W rated.

[Floont]

I have changed the cart on BMSbattery.com to a 2000W 125VDC charger, so I can get a 10amp charge.
I don't want to spend my waking hours waiting on LiPo batteries to charge.

You know, your 120V sockets are 1650W max and it seems not to be underrated. I have successfully melted 2 sockets at home by connecting portable Air Conditioner 1600W rated.

Yep, that's why I my garage sockets are on 20amp circuits.

That's a kind warning, though. A lot of people don't stop to think of the power that is being used to charge the batteries. The shorter the charge time, the higher the wattage, the higher the amps, and pretty soon we have a breaker trip, melted socket, or worse.