Re: KiwiEVs next project fast EV
Posted: Jul 11 2017 12:51am
I don't get how this would work..? how are you going to get up to full pack voltage for charging? Inverter?
Electric Vehicle and Technology Forums
That's how I do it on a smaller scale for my recumbent. I step 12V up to 58V open. Yeah there are some losses, but it's still worth it.Animalector wrote:I don't get how this would work..? how are you going to get up to full pack voltage for charging? Inverter?
Do you know of a charge controller 50 ampswould be nice.Jayls5 wrote:As long as you're using a charge controller to limit the amps being fed between the two packs, I wouldn't see a problem with it. It would be the worst idea ever if you didn't use a charge controller though, because the only thing that would dictate the charge rate would be the voltage differential and the resistance between the two packs. It would surely exceed the continuous charge rate if you had a dead pack on one side and a full on the other.kiwiev wrote:If I connected up 49 s 1 p and used a solar controller i can get and program to charge to say 170 volts could I directly plug that into the Tesla pack and dump 20 kwh into it? I can find any sort of charge controller for that on the web.
Is there a buck converter that will go to 162 volts?Cowardlyduck wrote:That's how I do it on a smaller scale for my recumbent. I step 12V up to 58V open. Yeah there are some losses, but it's still worth it.Animalector wrote:I don't get how this would work..? how are you going to get up to full pack voltage for charging? Inverter?
So did a test today with the new ute lid. 40km round trip into town which is a 1000ft drop 15km at 100kph then around town and trip up hill home.Jayls5 wrote:I'm not sure what you mean by "one more cell" being enough. For a fast charger? Of what?kiwiev wrote:That's a great idea, my pack only sags to 146 volts in the summer.
We don't get many Tesla wrecks down in Australia yet the odd one or too but we have our names down, I could turn my Winston pack into a fast charger do you know if one more cell would be enough?
By the way, the rear cover looks great. It's nice to be able to tell if mods like that make a difference just by monitoring cruising power consumption.
Thanks mate and that would be the KISS principal out the window I dont know of a solar controller that would go that high either and use 6 x 24 volt panels, it would get close or even 7 panels. Just awkward to mount that many.Cowardlyduck wrote:Awesome stuff mate. I found similar result after putting the wind deflecting solar panel on the front of my recumbent. Aero makes a huge difference to EVs.
As for the charge controller/converter for a 162V battery...I see what you mean....I can't find anything with decent power that will do that high a voltage.
That really sucks as that's the only thing preventing you from being able to do it really.
The other horribly inefficient option is to use a regular MPPT to 240V AC, then run a regular charger off that. Maybe with a small 12V battery before the MPPT it would even out any power dips.
At least it would work
Will do just have to wait for the ski season to finish too many police around atm.Jayls5 wrote:I would love to see some acceleration runs on that thing