How-To: Meanwell 63-84V CV/CC Charger

[Kingfish]

Does the 'mini meanwell limiter board' solve the problem on the meanwell 'SP' model to handle CC ? Thanks

I would ask fechter directly as I do not have that information. I personally do not use the SP units anymore; maybe I should sell them off.

~KF

[ZOMGVTEK]

Does the 'mini meanwell limiter board' solve the problem on the meanwell 'SP' model to handle CC ? Thanks

My SP-500-24 units were modded for CC with no problems.

viewtopic.php?f=14&t=27199&start=240#p463280

I have the parts for 5 limiters sitting in a box that I'm probably never going to use now...

[Alan B]

Would a set of three S350-24's in series, with the appropriate controller be a better choice? 14 amps output at 75 volts plus or minus? About 1235 watts at 85% efficiency, so about 10.3 amps at 120VAC?

[EVInfinity]

With these things, in my opinion, if it's not an fairly simple solution, just get a new one. Your time is probably worth more than the $35 to replace it, that's my rational. Lol, that is the problem with Chinese production, they make things so inexpensive that it isn't worth it to get the item repaired. Landfills are suffering (as in multiplying) as a result.

On another note, let me give a word of caution(/common sense ) to everybody who uses these supplies.

DON'T try to tighten the contacts while the power is on..... Tonight I was charging my battery, and decided to tighten up the screws on the AC input lines. As I was tightening the Neutral line(with my finger on the screwdriver shaft), I touched the metal case with my other hand to support it. Lol, one hand on Neutral, and one on Ground makes for a not so pleasant complete circuit.

I also wanted to mention a good experience I had with a seller. I recently ordered 3 copy Meanwells from a supplier on Aliexpress, for about $35 each. They came within 5 DAYS of me submitting payment, via DHL at no extra charge (even though it listed free standard international shipping). The board is well built, and the solder joints all seem well done. It has the SVR2 and R37 pads as well, which is a nice change from some eBay suppliers. These are fully functional as CC/CV once modified (no hiccup mode, or weird sounds). I am very impressed. Here is the link, enjoy.

http://www.aliexpress.com/product-fm/52 ... alers.html

[kevo]

EVInfinity wrote: Here is the link, enjoy...

Thanks for posting the Allexpress link, I haven't seen that low of a price on Meanwells for quite a while. Unfortunately I came across this about a month late and they are now out of stock. Oh well they come and go fairly often.

[amberwolf]

I think what we need to do is branch this thread and begin anew to build/source a good 100VDC/100A Watt meter. Whatcha think?

Hmm...thread necromancy:

Since it was never mentioned after this point, I suspect you found one, but I do wonder why you never attempted (and no one suggested) to use your Cycle Analyst (assuming you already had it at this point) for measuring pack charge on teh DC side. (perhaps yours was a direct-plugin type, which makes it slightly more complicated to use ti to measure charging, but it is still possible if you install charging plugs on the controller itself, so taht you can charge thru it's shunt).

If you need higher than the 45A stand-alone shunt the CA woudl normally come with if it's not a DP model, then they ahvea 200A shunt on the ebikes.ca website.

[NeilP]

In conversation with Justin at e-bikes.ca, I suggested that they market a basic, cheaper CA, that does just that, a power meter without the cycle side functions.

He did say that something liek that was on the cards, but when...that was the big question..other jobs were more important..like the V3 CA no doubt

[Jeremy Harris]

In conversation with Justin at e-bikes.ca, I suggested that they market a basic, cheaper CA, that does just that, a power meter without the cycle side functions.

He did say that something liek that was on the cards, but when...that was the big question..other jobs were more important..like the V3 CA no doubt

Sounds like the thing I'm working on for the display on my new folding bike project. Here's a snap of the first run with code that "sort of" works OK:

Prototype OLED display.JPG (120.71 KiB) Viewed 362 times

The top line is fixed and displays battery current, battery voltage and power, the bottom line is a bargraph showing how much of the available battery capacity has been used, a bit like a car fuel gauge. It just keeps track of Ah used, subtracting them from the total that's reset to the battery nominal capacity when the battery is charged.

I'm not going to be making and selling it as a product, too much customisation needed for each user and I don't have the time. I will happily make the schematics and code available - no circuit boards are needed as I've used an off-the-shelf organic LED display with an easily programmed µcontroller piggybacked on it. The display and µcontroller retail here for £9.99 (about $15). The only extras needed are a current sensor module (ebay) and a couple of voltage sense resistors that can be included in the wiring.

[IBScootn]

Bump

[deVries]

Sounds like the thing I'm working on for the display on my new folding bike project.

The top line is fixed and displays battery current, battery voltage and power, the bottom line is a bargraph showing how much of the available battery capacity has been used, a bit like a car fuel gauge. It just keeps track of Ah used, subtracting them from the total that's reset to the battery nominal capacity when the battery is charged.

I'm not going to be making and selling it as a product, too much customisation needed for each user and I don't have the time. I will happily make the schematics and code available - no circuit boards are needed as I've used an off-the-shelf organic LED display with an easily programmed µcontroller piggybacked on it. The display and µcontroller retail here for £9.99 (about $15). The only extras needed are a current sensor module (ebay) and a couple of voltage sense resistors that can be included in the wiring.

Very, very, very kool Jeremy. Thank you for doing this. I hope you'll start a thread topic about this, so all the documentation can go in one place.

Thank you!

[Jeremy Harris]

Very, very, very kool Jeremy. Thank you for doing this. I hope you'll start a thread topic about this, so all the documentation can go in one place.

Thank you!

Thanks for the kind words. I won't derail this thread any more, but updates will initially be on my lightweight folder thread: viewtopic.php?f=3&t=42133

If there's interest in a DIY unit like this, then I'll put all the documentation, code etc on a separate thread in due course.

This unit also turn the bike on and off too, with no current being drawn in the off condition, although that needs some additional circuitry. The code still needs tidying up, and testing (leading zero blanking was doing odd things last night, for example) and some of teh control functionality for turning the bike on and off needs sorting, but the bulk of the code works for measuring and keeping track of current, voltage etc.