Reviving the possibilities of onboard battery extender

[dalton108]

Haha. Agree. It looks like a model S got smushed in a panini press

You’re supposed to follow the aerodynamics and let form follow function, but, everybody knows (except Lucid)— you never go full aero!!!

Sponsored

 

[dalton108]

Who knows? At this point, it's just an untested prototype in Eastern Europe in that may or may not ever be commercially viable, and that may or may not meet US safety standards.

Even if it does work well, a 17.1 kWh battery is probably not big enough to make sense for the Cybertruck. That's probably about one-third the capacity of Tesla's canceled range extender, which was supposed to deliver about 100 extra miles. So for a CT, you could potentially end up spending thousands of dollars on the battery and the installation, and then end up with just 30-35 miles of extra range.

And our own @CT_AZ_4x4 has already cracked that!

 

[hemiarch]

Who knows? At this point, it's just an untested prototype in Eastern Europe in that may or may not ever be commercially viable, and that may or may not meet US safety standards.

Even if it does work well, a 17.1 kWh battery is probably not big enough to make sense for the Cybertruck. That's probably about one-third the capacity of Tesla's canceled range extender, which was supposed to deliver about 100 extra miles. So for a CT, you could potentially end up spending thousands of dollars on the battery and the installation, and then end up with just 30-35 miles of extra range.

Not if it also has solar inputs. 17kw drains down much slower with about a 1kw of continuous juice going into it that’s not accelerator or velocity sensitive like the trucks drain is.
When the truck is stopped and that 17kw battery is full it could then charge the rest of the truck battery for a bigger reservoir.

 

[hemiarch]

And our own @CT_AZ_4x4 has already cracked that!

That’s my homie right there. Y’all ought to see sometime what it looks like when he “problem solves” in his garage. It’s a sight to behold.

 

[dalton108]

That’s my homie right there. Y’all ought to see sometime what it looks like when he “problem solves” in his garage. It’s a sight to behold.

I bet!

 

[mongo]

Update: EV Clinic in Croatia now claims to have a prototype 17.1 kWh range extender that can be wired in parallel alongside the original battery in any EV:

I don't see how wiring different chemistries in parallel will work, especially LFP vs NCA (NMC?))
The SOC vs voltage curves don't match so one will carry most of the load and one will go flat first.
Similar problem during charging.


EDIT: The linked extender uses NMC cells from Samsung SDI, so that may line up for non-Cybertrucks (since CT is 800V)


A 20kW DCDC converter connected to a 40kWh pack would provide up to two hours of support. Combined with 120kWh from main pack that'll allow 150 miles at 1kWh/mile.
Most cells can support that 0.5C discharge, but to do it again for the next leg requires >1C (40kW) charge rate to charge in under an hour.
Using a high voltage aux pack allows for a second fast charging connection, but complicates the overall design.

A paralleled 48V system with the batteries in the trailer and HV on the truck might be a good trade off. Multiple cables needed, but safer for the user. Maximizes payload also.

 

[CT_AZ_4x4]

And our own @CT_AZ_4x4 has already cracked that!

And our own @CT_AZ_4x4 has already cracked that!

Cybergirl has installed 2 Ecoflows in the rear seat area and that would allow for environmental temperature control of the extra batteries. It is a fantastic solution.

I do appreciate the modularity of the Bluetti B300K 2,785 kw units, however. They are each 65 pounds so they are heavy but not unmanageable, and 2 of them paired with 2 Apex 300s fit nicely under the tonneau.

I’m getting ready for my December elk hunt in the remote O’Haca and Hopi 4-Canyon areas. I’ll probably be re-charging at the CCS Electrify America chargers in Winslow, AZ, but having the Bluettis charged and available at Basecamp will be reassuring/convenient.

https://www.cybertruckownersclub.co...-power-station-range-extender-solution.48915/

And our own @CT_AZ_4x4 has already cracked that!

 

[hemiarch]

Cybergirl has installed 2 Ecoflows in the rear seat area and that would allow for environmental temperature control of the extra batteries. It is a fantastic solution.

I do appreciate the modularity of the Bluetti B300K 2,785 kw units, however. They are each 65 pounds so they are heavy but not unmanageable, and 2 of them paired with 2 Apex 300s fit nicely under the tonneau.

I’m getting ready for my December elk hunt in the remote O’Haca and Hopi 4-Canyon areas. I’ll probably be re-charging at the CCS Electrify America chargers in Winslow, AZ, but having the Bluettis charged and available at Basecamp will be reassuring/convenient.

https://www.cybertruckownersclub.co...-power-station-range-extender-solution.48915/

Yes. Definitely worth mentioning cybergirls solution also. Pretty brilliant.

 

[mongo]

Ecoflow now has the Delta Pro Ultra X which will pump out 12kW from one inverter with 12kWh of storage from two batteries, expandable to 10.
Definitely bulkier, but allows max charge power without needing two inverters and combiner like the DPU.

 

[CT_AZ_4x4]

Ecoflow now has the Delta Pro Ultra X which will pump out 12kW from one inverter with 12kWh of storage from two batteries, expandable to 10.
Definitely bulkier, but allows max charge power without needing two inverters and combiner like the DPU.

That is so incredible! Amazing how much the technology is advancing so quickly!

 

[hemiarch]

Ecoflow now has the Delta Pro Ultra X which will pump out 12kW from one inverter with 12kWh of storage from two batteries, expandable to 10.
Definitely bulkier, but allows max charge power without needing two inverters and combiner like the DPU.

Does anyone here know if a DPU and a short stack of its batteries will fit side by side in the back of the vault?

 

[mongo]

Does anyone here know if a DPU and a short stack of its batteries will fit side by side in the back of the vault?

It looks like an inverter and 2 batteries will just fit if stacked, but it's really close due to slope of vault cover. I don't think the interlink cables allow for side by side placement.

 

[hemiarch]

It looks like an inverter and 2 batteries will just fit if stacked, but it's really close due to slope of vault cover. I don't think the interlink cables allow for side by side placement.

I need to look into that because I believe the design of those cables is different for the dpu-x

 

[mongo]

I need to look into that because I believe the design of those cables is different for the dpu-x

Yeah, X has dual feeds with an offset cable (lemme know if you find a photo of a 4 battery stack)

Sponsored