Ping BMS Shut-Down (re. My new ping setup with pics)

Hey where is the pics?? I feel cheated! How's the weather there? It's getting cold here in Chicago.

When you accelerate hard near the end of your pack's charge, the voltage drops dramatically, the low voltage cutout (LVC) will activate and you're powerless. Were you able to accelerate/drive slower and keep the LVC from activating? The lithium battery's discharge curve is linear, until around the last 80% where it becomes exponential. When you start to get to that exponential part, you'll see the voltage at rest is low, then really low..

If you have a voltmeter you can get a feel for how charged your pack is by how large that voltage drop is when you accelerate. If you get a display with two needles, one for volts and one for amps, you can make a background that will always show the battery's charge where the cross hairs meet.

I forget which motor you have at the moment, but your range is pretty close to what it should be, depending on a zillion variables. Some folks are great at hypermiling and post amazing ranges, but it seems like most of us get a lot less. Everything you describe seems pretty normal for a Ping pack. Actually you will eventually begin to see a very slight decrease in speed and power towards the last two miles or so of the ride and if you pay attention you will have some warning. Usually that is easier to detect if you do a routine ride like I do. I know that if I am slower than 19 mph as I pass Onate High school I better start conserving since I am still 4 miles from home. In general though, you would be real smart to just find out what normal range is, and then try to be home with 25% less miles on the cycle than that. Shallower cycles will definitely make the pack last. If you think about it, ideally the bms cut out is never reached lessening the chances that you kill a cell.

When you do ride till cut out and you have a few miles left to go, I have found that you can unplug the battery and plug back in, and get power back. At that point, if you just barely touch the throttle, you can get just enough watts to flow without tripping the cutout to get the motor cogging to go away. I find it makes peadling home much easier. You can get maybe two more miles out of it this way.

As you break in the battery, for the firt ten cycles or so, leave it on the charger at all times so the balancing can reach it's max potential. Later on, I am being advised to do this about once every one or two weeks.

like other chemistries, cold will shorten the range of lifepo4.

Sometimes people expect to much, ur range sounds fantastic.
People expect to much because of the lies of the manufacturers across the board,
My first SLA bike which had an advertised range of 20-25miles, did about 3 lol!
I wish everyone was honest about their ranges. Then when someone like u got 20mile range u would realise how fantastic it was.

My first Steel SLA bike its still being advertised on Ebay as 20-25mile range - I dont know how they get away with it.
For fun I recently bought a electric dirt bike, its fantastic fun, well worth the £245, but even that had a advertised range of 10-15miles and perhaps 5 is more accurate before it really starts slowing. Still u get a great 5 miles out of it!

Range at what speed is allways what I think when I see range posted. I wonder just how slow you have to go to get 250 miles in a Tesla. Hee hee. When I bought my ebike the sla range was supposed to be 15 miles. I have done 14, but it is all down a really big hill from my house to work. coming back, more like 8 miles, and only by really milking it and riding slowwwwww.