Soo waaay back on thursday I started a reply right when this was posted. I then had to leave work for a family emergency and just got back today...
but since I typed it out, I figure I would post it anyway...
actually the power tank has shit all in terms of battery capacity and its priced at $4000 in Australia, its an overpriced gimmick that offers very little in terms of range improvements, I can buy tesla 18650 batteries for pretty cheap so if I was after another battery pack I could buy a second hand worn out zero battery pack and exchange the old batteries with 18650's, there are youtube tutorials on how to do this.
Thats a great theory, but its really hard to find a used zero battery pack, and near impossible to find a worn out 2013+ zero battery pack.
Even once you do, its just a box. The BMS would not work for you, so just make a box.
Now that you have a box, take your 18650s and ideally pack them for the max amount in the space.. You will find you can not fit the same capacity, because a decent percentage of space is wasted by the areas between the round cells. the zero pouch cells are flat and take up almost 100% of the space. also each one of your cells has a case around it, meanwhile the larger cells of the zero mean theres less space wasted by the case.
All that is irrelevant though.. if you pack the hell out of them in a box, and then use the resulting power to charge the bike, that would be cool.
what I was asking was can the bike be charged while riding, from your responses I'm thinking yes?
Depends on how.
I dont think the stock onboard charger for the newer S models will work... there should be some kind of CAN interlock that says not to move if its plugged in the wall, but I have not tried that. If you have a zero you can test this by using an extension cord and trying to ride down the driveway.
ok, if it works, great. The stock charger is only 1200w or so... BUT you can use DC voltage to power the charger.. so if you stack your Tesla cells to about 90v or higher it can directly charge the bike via the onboard.
OR
you could power a second charger of your own choice. they would also work on DC power. Most switching power supplies will. then plug this into the charging port. that should work without issue in 99% of the cases. Im sure there is some seasoned expert **cough*Terry?**cough** that can explain any possible issues to look out for if you choose this path.
what I was actually thinking is modifying an Uninterrupted power supply
Bad idea. You're taking a DC voltage upping it to AC at the wrong voltage then feeding it into another device(the charger) that just makes it DC again and corrects the voltage for the bike.
cut out the middleman, put the DC power directly to the charger. MUCH more efficent.
connecting a few solar cells to a windshield and on my side saddles to trickle charge the ups lithium batteries
This is one of those things that sound great in theory, until you do the math. If I said I had an unlimited supply of AA batteries, so I will connect them one at a time to a massive EV pack to recharge the pack, you would think I was nuts... but all of your surface area of the bike, covered in solar panels in ideal light (impossible since atleast one side is shaded by the sun btw) you would get the equlivent of less than 8 AA batteries.
Think of the big panels you see on the roof of homes. one of those HUGE panels makes about 250watts. Your charger requires 1200watts.. or about 5 of them. so to run your charger 1 hour, you need 1 of them to charge for 5 hours... or about the entire day of "solar time" for most of the world. outside these ideal 4-5 hours of time the panel puts out less and will make less than 250w.
I'll rephrase this again. Lets say you drag out 5 massive panels on a trailer. you set them all up and aim them perfectly, all during the ideal riding time... your bike takes 8 hours to charge. that is the majority of daylight time to charge.
In otherwords, solar is cool when you have the space and time... but it is not practical for EVs.
and use the ups (when its full) to charge the bike (because solar panels don't give enough WATTS to charge the bike directly)
It also doesnt make enough wattage to charge your add-on pack in a week...
it can be used to put some power into the battery while riding that would also increase the range slightly, I'm guessing the increase would be about 10% on a full trip
highway crusing you're using just over 6kw.
Your charger consumes about 1.2kw and about 90% of that goes in your pack... so about 1kw. so fudging a bit, you may get 15% more range, even with the tiny stock charger, IF you're just highway crusing... 10% average if you're really riding sounds reasonable.
also if I stop the ups could remotely charge the bike without needing to be plugged into a power point, great for a bit of extra range.
as I pointed out, solar is not practical to charge, but if you make the battery the same voltage as the zero, you can flip the chargeport charger into the extra battery and charge it on a second EVSE.
This would allow for further distance and quick charging.
As noted earlier, even if you had massive house size panels, solar isnt really an option right now.
The Ups can be plugged into a power point to slow charge just like the bike can, or use solar power, the downfall to that is that it would take the UPS like 2 days of direct sunlight to charge completely and could not charge the bike to full in one go anyway, so it would take probably a few days to solar charge the bike in this way.
again, the UPS aspect can just be removed in favor of just an actual battery... but even if it was not, any UPS that fully charged in 2 days of sunlight with panels the size you described, would only have enough power to get you a kilometer at low speed... maybe less distance than that.
The point being that you can get all of your power from the sun and get your bike to 100% charge from a setup that's no bigger then a side saddle.
You either have to throw out the side saddle size concept, or throw out the solar charging one.
Meaning its completely free energy from the sun and no power points required meaning you can camp out and never be stuck as long as you have sunlight. you could also get some fold out solar cells to lay on the ground to help power the UPS if you need it to charge faster, which could halve the time you'd be waiting.
This is a cool idea if you have a day or two and want to recharge... however it would be a custom travel trailer. you could then stack home size solar panels to unpack at camp... charge its battery and have that battery charge the bike with a DC-DC converter.
We're talking a decent size motorcycle trailer stacked with several panels, the battery and electronics... and then I would assume room for packing camping stuff too.. This could be cool.
However, its not "free". What Im thinking of will probably be about 2,000USD if you did it on the cheap, knowing what you're doing. very cool... but it would take me 2 years for my house to use that much money worth of power, nevermind the bike.
I know its not practical, but it would work.
If its not practical... is it really working?
I have a fast charger for convenience, this idea is just a working theory that I might use to travel around australia for free with...
again, for this to work, it would cost so much in equipment that calling it "free" is out of the question.... or it wont work at all but you'll have one of those bikes with a bunch of electronic junk all over it, not charging but looking like it could.