V2V Pass Through Charging patent filed by Rivian

docwhiz · Jul 15, 2023

https://www.greencarreports.com/new...charging-could-use-its-evs-as-extension-cords

Rivian has filed a patent application for a pass-through charging system that would allow the automaker's electric trucks to pass current from vehicle to vehicle.

As described in the application, which was published by the United States Patent and Trademark Office (USPTO) on June 22 and originally filed in December 2021, pass-through charging could solve the problem of multiple vehicles needing to be charged in a single location where there may not be room for enough chargers.

trez63 · Jul 15, 2023

The tow truck of the future will definitely need this patent. You run out of charge and the truck gives you a few miles to get you going …

Craigins · Jul 15, 2023

trez63 said:
The tow truck of the future will definitely need this patent. You run out of charge and the truck gives you a few miles to get you going …

That's a different type of V2V charging type.

I don't see this working well for DC Fast charging, but it would be interesting for L2 charging where there is only plug access in one parking spot.

Zoidz · Jul 16, 2023

This looks like a solution that Amazon and other fleets might use. As vehicles return from deliveries, they park side by side at the loading dock and connect to a DCFC daisy chain. The next morning, the entire fleet is recharged without anybody having to constantly attend to moving and charging vehicles. EDVs could be loaded while charging, without the need for multiple chargers.

HaveBlue · Jul 16, 2023

It's a great idea. Put a port on each corner and it would be possible to plug in from either corner as well. No more short cable issues.

docwhiz · Jul 16, 2023

Craigins said:
That's a different type of V2V charging type.

I don't see this working well for DC Fast charging, but it would be interesting for L2 charging where there is only plug access in one parking spot.

I don't see why it wouldn't work for DC charging since the batteries are HV DC in each truck.

SSteveEV · Jul 16, 2023

I'd love if them implemented this as the switch to Tesla port. Pop a Tesla plug front left, leave CCS where it is, bam! Extension cord, adapter, proper Tesla placement, and dual ports all done!
Also leave it so any old neighbor can plug in when they park next to you.

(I understand that won't be implemented but it would be great)

Craigins · Jul 16, 2023

docwhiz said:
I don't see why it wouldn't work for DC charging since the batteries are HV DC in each truck.

that's not what the patent is talking about.

The patent essentially has a switch that closes to the vehicle battery to charge the current vehicle, or it closes on the pass through to the next vehicle.

The longer the "cable" the more resistance. This is one reason why the longer DCFC charger cables are actively cooled. So adding additional length, plus additional resistance from all the daisy chaining connectors and switches wouldn't be the greatest idea for the high voltage/amp dcfc.

It is definitely a good idea for their fleet solution, as someone pointed out. You could then smartly control which vehicle in the chain charges by what range that vehicle is assigned for the next day.

docwhiz · Jul 16, 2023

Craigins said:
that's not what the patent is talking about.

The patent essentially has a switch that closes to the vehicle battery to charge the current vehicle, or it closes on the pass through to the next vehicle.

The longer the "cable" the more resistance. This is one reason why the longer DCFC charger cables are actively cooled. So adding additional length, plus additional resistance from all the daisy chaining connectors and switches wouldn't be the greatest idea for the high voltage/amp dcfc.

It is definitely a good idea for their fleet solution, as someone pointed out. You could then smartly control which vehicle in the chain charges by what range that vehicle is assigned for the next day.

One of the advantages of high voltage DC is lower current so less heat in the cables.
100 kW at 400v is 250a which is reasonable. You can get much more power at high voltage.

Paradigm_Shift · Jul 16, 2023

interesting, Apple filed for a Vehicle to vehicle charging patent a few years back as part of their project Titan. IIRC, Apple's allowed MOVING vehicles to interconnect to share charge

V2V Pass Through Charging patent filed by Rivian

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