OW Plus CnR
Probably one for @S-Leon but fishing for answers anyway :)
I’m possibly riding around with someone in the coming weeks but the only other board I have with usable range and speed is the Plus. That said it’s not a lot of range so I was wondering how well does CnR work with the plus and does it ride well with those solar charge controllers hooked up to perform the voltage conversion?
I’ve got my old “Lifejacket” project laying around that mounted 2x 36v ebike batteries to a MPT-7210a charge controller that I used to use for charging on the go on the XR.
Anyone tried that solution with CnR or is that only best used for charging while stationary?
Couldn’t figure out the answer myself looking at the old wiki page
Bit more research now I have the desktop and not just on an iPad. Looks like it is possible so will have to give it a test.
@lia -- Hi Lia, Works great! I had my booster plugged into vampire wires, and loved it! The 36 volt hoverboard batteries quit taking a charge after two years of constant use, and I went to EGO batteries (which need no booster for VnR to a V1 or Onewheel Plus) or I would still be using it. Actually, I may rig it up again, this time to the OneDanXR, using an EGO battery feeding the booster. The only trouble I had over the two years of use was that downhill braking regen added to the amps of the booster caused cut-out two or three times (even many miles ridden down the road) -- hence my addition of freewheel brakes. ...Edit: Once falling on a backpack of batteries nearly whiplashed my neck, and once falling on an EGO battery in a shoulder bag cracked two ribs. I much prefer mounting the set-up on the fender...
@lia -- CnR should be almost the same as VnR, but with a non-intrusive connection. The CarvePower kit included a power switch to flip off when in a regen situation. With a VnR connection the booster would power up the Onewheel if I hadn't turned it on already -- then a few seconds later would power it off, and I tumbled, twice minorly. That power up would not happen with CnR.
@s-leon Thanks. My go to fountain of knowledge for all things Plus :)
I'll see that it's like. Regen I'm guessing is a problem because it tries to feed back into the DC-DC controller which probably doesn't take kindly to reverse current.
@lia -- Another thought, I am sure you know to check the settings on your booster for output and input voltage and amperage, and too, the low battery input cut-out threshold if applicable.
@lia --Actually, I think the combined regen with booster output triggered overcharge or overcurrent (two separate issues which confuse me) in the Onewheel. The booster won't accept reverse current. ...Edit: It must be 'overcurrent' because the onboard battery had plenty of ability to accept charge...
@lia -- Enjoy your Onewheel Plus! And your riding companion!
Edit: It must be 'overcurrent' because the onboard battery had plenty of ability to accept charge...
Ah wait that's it, you're charging the board through the port and getting regen which'll trip overcurrent protection on the BMS.
That does then make me wonder what the hard limit is on charge currents since presumably the same applies unless it's only a software trigger to halt operation and not actual charging.
Will do :) Thanks~ x
@lia be sure to wear protection!
@lia -- The rails-to-trails Greenway I mostly ride is flat with no hills, so the regen issue did not much bother me. It was only on hilly roads -- and only while braking that overcurrent occurred. So, I concluded to try to minimize braking going down hills with a deliberate slow approach -- that and the addition of freewheel brakes so as not to be downhill accelerating with little control, dragging the slippery tail after power cut-out.
Playing with the output setting -- three amps was not enough, five was better, eight was possible. With somewhat success, my goal was to feed in enough that both booster batteries and onboard battery came to rest at about the same time, thus maximizing my range.
With the green solar controller, reasoning that airflow from Onewheel motion alone would cool it, I removed the fan, because I did not like the noise of it. I had no problems with it, although I did not use that particular booster all that often.
@s-leon Good to know about the output current. I might have to go all out see if I can trigger it on my normal ride to be sure my setup won't turn into the next Christine adaptation.
Will be fun to drag this kit out of retirement!
@lia -- Off-topic, but those Plato shears hanging on your pegboard are the same I use snipping the cracked shells of black walnuts to deliver nice, whole quarters of nutmeats.
After gathering the nuts in their green hulls, hulling them under the wheel of a DR Powerwagon, cleaning the messy hulled nuts in a cement mixer, and drying , aging, and storing the remarkably, very clean nuts in fifty pound lots in squirrel-proof hardware cloth tubes, I crack the nutshells, about two quarts at a sitting, usually with a powerful electric nutcracker, although sometimes with a vise, or a hand black-walnut-nutcracker. Then I snip, snip, snip off the cracked shells by hand, throwing the nutmeats into a colander to drop out any small pieces of shell that might get by my eye. And, yes, I occasionally use a Onewheel to fetch and carry.
Beautiful booster set-up, by the way!
@lia I may have missed something, I thought you had a XR too.
@lemur I do have the XR (in the pic) but I'll be riding that. I need something to keep up for my friendo to ride with that's visiting :)
There is an 4209 controller/BMS waiting for a body. If I had a battery I'd drop that in the Plus body but I haven't acquired one yet.
@S-Leon Aha that's pretty funny, I got those to replace my other side-snips from my 3D printer since they tend to dull and break.... like when your sis uses them to cut guitar strings instead of using the massive tin snips I said to use >.>
After some consideration the old charger might not be ideal. It was pretty heavy (8.4kg) and bulky. Okay it held a lot of juice but probably there's a reason I then built that brick of a 63v battery instead.
Cells aren't that pricey though. Currently I can pickup 28x Molicel P42A 21700 for £3.75 each which would give me a 8.4Ah battery for only £105 (excluding BMS).
Now... that is the wholesale site which I'm almost certain I shouldn't be using... buuuuut they didn't stop me buying the cells for my last battery and these are 41% the price as the retail site sooooooooo...
So push comes to shove I might make this battery and use a fender I got from the V1 since it's pretty durable. Not stoked on making a battery I'll rarely use but I also don't feel great making someone use that old setup
@lia buy a lawnmower at home depot then return it. it makes a scary sound!
@notsure That would be a good idea. Hmmm.
Amazon do have returns within 30 days but not sure how that'll go. Tempting though, hadn't considered that lol... definitely fits my vibe as of late.
In holiday mode, yesterday I revisited my box of voltage boosters. Pictured is the booster I got from CarvePower; the number on the circuit board is QS-4884CCCV-1800W. Googling that number I found a PDF manual for adjusting settings.
The tiny little straight slot screw in the green magnifier near the OUT wires adjusts output; for my Plus and V1 set to around 53 or 54 volts. It's a straight-forward, simple set if you have a volt meter connected.
Near the IN wires the tiny little straight slot screw in the blue magnifier adjusts the source voltage cut out. From the factory it is set around 10 volts -- not good for 36 volt bike batteries nor, in another case, for EGO batteries. To set this one I used a source battery which was at the voltage point that I wanted the cut-out. Backing off the adjustment screw until the blue UVLO light came on, then I fine tuned the threshold of it.
In the red magnifier in the middle is the current adjustment. To adjust this the booster needs to be under load -- like recharging a discharged battery. From what I read the factory setting is about 10 amps -- which seems like it will be fine to me.
Output voltage for a Onewheel Plus or V1. The current draw is an incandescent light bulb -- Thank you @Lemur for the idea.
The set-up at below the low voltage cut-out. The blue light -- not really that bright -- indicates the the threshold has been crossed. And, look at the output voltage -- it is now the SAME as the battery voltage, meaning it is no longer boosting current. So... at that point... I am riding on fumes.
In my boosters and parts box I also have a green MPPT, which is easier to set for OUTPUT and AMPERAGE -- although I am not sure about setting low voltage cut-out on it. And I have two other boosters very similar to the CarvePower in adjustment, but slightly different (two 20 amp fuses instead of three is one difference). One of these slightly different boosters I have set like the CarvePower unit boosting up 36 volts to 54 volts for Plus and V1; the other set for boosting an EGO battery to Onewheel XR voltage. On these boosters I needed to chip off glue around the set screws in order to make the adjustments.