Hi Kris – any updates? This is one of... if not the... most anticipated/needed developments in the Roadster community so we're all remaining hopeful things are progressing nicely for you and the Rosa Motors team
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New Roadster 4.0 Battery developement with Model S cells
- Thread starter chrisro
- Start date
fsmouterr
Member
Stevewaclo
Member
Hello, we are ready to produce 4.0 packs. However due to situation we have some difficults with transport from China. As soon it is solved we can fully produce final version of packs. Currently two test cars running battery prototypes and we still improving here and there. We had quite a lot of problems at the beginning, but now looks fine.
Congratulations to you @chrisro - and to the whole community that stands to benefit from your work. I can’t imagine a more welcome third-party contribution to the future of these cars!
Can you go into some more detail on your packs?
- How many do you expect to make, and what will the approximate pricing be?
- Did you end up making both a “big” and “small” version with different weights/capacities, or is that still on the drawing board?
- Are these all-new packs, new sheets for existing packs, or new internals for old sheets?
- What can you tell us about the cells you’re using? Are they new, or harvested from used/wrecked Model S packs?
I’m sure we’re all hungry for any details you can give!
Again, congrats!
Can you go into some more detail on your packs?
- How many do you expect to make, and what will the approximate pricing be?
- Did you end up making both a “big” and “small” version with different weights/capacities, or is that still on the drawing board?
- Are these all-new packs, new sheets for existing packs, or new internals for old sheets?
- What can you tell us about the cells you’re using? Are they new, or harvested from used/wrecked Model S packs?
I’m sure we’re all hungry for any details you can give!
Again, congrats!
Gabner
Member
Congrats and thanks for the update. I hope everybody appreciates your persistence to overcome some major hurdles to get this done.
Onno
Member
Onno
Member
backmost
Member
Its not a battery thing. The plumbing to connect the battery to the external (super) charger is not present in the Roadster, so there's no way to supercharge them by simply swapping batteries. The PEM is the charger, and it's limited to 70 amps at 240 volts (which isn't half bad if you can find one!). There was a CHAdeMO retrofit kit that was produced by a 3rd party which added another inlet socket and included wiring and contactors to inject the DC into the system, but they're no longer available to my knowledge.
I'd love to find a high power inverter that could take the 400 volts DC from a CCS / CHAdeMO Level 3 charger and produce 240 volts AC at 70 amps. All we'd need is an Arduino-esc controller of some sort to produce a substitute pilot signal in some meaningful way, and we'd be on the road. Perhaps the guts of a PowerWall might have the necessary parts?
Excellent progress!
Any guesses on when (if?) this will become an option for those of us with currently ok batteries, realizing they won't last forever? Mine seems to lose a couple of miles of range per year, and with a standard charge now down to 154 miles, the end of practicality is starting to become visible.
Any guesses on when (if?) this will become an option for those of us with currently ok batteries, realizing they won't last forever? Mine seems to lose a couple of miles of range per year, and with a standard charge now down to 154 miles, the end of practicality is starting to become visible.
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