EV heat pump can extend range up to 10 percent

[stickyfingers]

They mention Rivian and how they do it differently than others.

https://www.engadget.com/g-ms-ev-heat-pump-can-extend-range-up-to-10-percent-130024466.html

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[ajdelange]

The writer of that article doesn't seem to understand what a "heat pump" is. Tesla didn't "add" a heat pump to the Y. All their models have a heat pump. What they did was plumb it in an innovative way (Octovalve) to be able to draw heat from the ambient and thus achieve range improvement when the ambient was warm enough. The linked article seems to be talking about similar technologies in competing brands. No, Rivian's scheme for thermal management isn't the same as Tesla's which isn't the same as GMs...

 

[Zoidz]

Here's a little more (but not alot) of detail about Rivian's method.

Here's an example of a Dana BEV Cold Plate. No clues as to what Rivian actually uses.

[SNARK MODE]
Having owned many GM vehicles over the years, i'm confident that this heat pump will be GM's #1 failure item on their EVs.
[/SNARK MODE]

 

[jollyroger]

I've remember reading that Rivian is including a heat pump in the technical roadmap based on an insideevs article about a month ago, but I've not actually found where it is. Anyone have any idea about when that might be? Might take the sting out of waiting for a truck

 

[kylealden]

One thing to bear in mind with any discussions of cabin heating efficiency is that the R1T has probably the highest ratio of battery size to conditioned cabin space of any EV on the market.

The battery is almost twice the size of a Model 3/Y for a cabin that is certainly smaller than the Model Y, and probably smaller than the Model 3 in terms of conditioned space (since the Model 3 cabin ventilates into the trunk). Meanwhile the R1T is about half as efficient (in wh/mi) as the Model 3.

All of which is to say, the percentage of your battery that goes to cabin conditioning relative to propulsion is going to be much smaller compared to smaller EVs, and the total battery is much larger. So solutions like an octovalve heat pump would hit diminishing returns sooner.

Tl;dr - not super worried about it.

(This doesn't apply, at least not as straightforwardly, to the R1S, which has a significantly larger conditioned volume.)

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