HV Battery degradation

Code only.
They are fine with you only being able to use it as a HEV, as are most manufacturers.
Sorry to hear about that much degradation, it’s very unusual, any idea how much range you have lost?

 

Sorry; you should call your local dealership and ask what the parameters are for traction battery replacement under warranty. I believe your 2017 has a shorter traction battery warranty than 2020+ models.

FWIW; my old Honda was required to throw traction battery specific codes twice, before it was replaced under warranty. I already knew it was bad by watching the very short charge/discharge cycles - so I just flogged it to throw the necessary codes.

Hope this helps....

 

If I wanted my hybrid battery to last 20 years, I'd keep it about 50% charge all the time.
I can't let it drain down, because the remote start won't work with less than 30% charge (which is really about 45%).

Still waiting for those dang updates.

 

Really not too surprised about the expectation.

Considering your daily ride has 10x the capacity and around 2x the COP in EV. How is that one holding its capacity so far? It's really not to hard to notice a big difference between the two, is it !

What are the hybrid reporter graphs looking like with the pack in its current condition?
And what was the first recorded kWh for a full charge after purchase date, if you checked. Used iirc.

 

Looks like you backed the wrong horse.
Any battery degrades with frequent use. The battery on the Prime is no exception.
Think about the fact that you used only electric mode, while carrying a gasoline engine and a tank with a fuel system every day, thereby loading the electrical system and battery with excess weight.
Perhaps it was worth choosing a fully electric car, in which the battery is more powerful and allows you to go long distances.

 

I like that the Prius Prime can run around the city on electricity alone. I find that there are still a few free charging stations.
But I also like going out of town, and a non-hybrid EV gives me range anxiety.

 

For what it's worth, my battery only charges to about half as much as it did in the summer. I was getting up to 61 kms EV range back in July, but now in February, it tops out at 30 kms.

 

The battery is still fully charging, but there are cold related charging losses and other factors affecting your miles per kWh

 

Driving a prime mostly on ev does not degrade the battery to any noticeable extent

 

Not for the first few years, at least not noticeably from looking at the OEM gauges.
It also make a big difference how the car is driven in EV mode during winter. Just imagine burning up all the SOC and having the engine fire on the freeway or i95 at 10 F.
Than there's history data that smooths out the winter range plunge.
Our Prime is holding steady at 30 miles range this winter. It accepts about 5.5 kW from level 2 chargers. And it is only driven in EV using the full charge. all the batteries capacity when it's above, way above freezing.
Plus I'm the primary driver this year and only a few here will remember why that might contribute to the cars condition.

 

The official EPA rating for the new battery is 6.34 kWh at the 240-V plug, not 6.6 kWh.

 

Lithium-ion batteries have a certain cycle life, and the capacity will gradually degrade which each cycle. A PHEV battery will degrade faster than a BEV battery for a given number of miles, as it will experience more cycles due to its smaller capacity. If we assume 2,000 cycles for a 20% capacity loss, which is probably a generous assumption for an NMC lithium-ion cell, this corresponds to about 50,000 BEV miles for the Gen 4 Prius Prime. Therefore, it is probably not a good idea to use the Prius Prime as a BEV. The Prius Prime is meant for BEV driving in the city, not on the highway for tens of thousands of miles.

 

not easy to accomplish at 30-50 miles a whack

 

I wouldn’t go that far. I have driven my 2020 Prius Prime about 86,200 BEV miles (out of a total 92,700 miles), mostly on the highway. I estimate about 10-15% degradation after cycling the battery almost 2,900 times. However, I drive mostly 55-60 mph in the right lane. It does sit in over 100 degree F weather for a large portion of the year and I use the AC very sparingly to get home 35 miles away without gas. I would think these are pretty extreme conditions. Lately I have been able to put 5.5 to 5.6 kWh into an empty battery. For 2024 I was adding 5.4 to 5.8 kWh to an empty battery.

 

My pip had about 50,000 ev miles with about 15% degradation after 12 years. most of the ev miles were around town

 

I believe the pip had less than half the range as the prime, so that’s probably over 4,000 cycles!

 

We have over-100-℉-weather here for a large portion of the year??

That sounds good. It could be somewhat worse than the input-kWh estimate because the capacity is not really determined by the kWh that goes in but the charge that goes in (time integral of the current). If the internal resistance of the battery has increased, more of this input kWh is being lost as heat (due to a lower charging efficiency).

You are like me—driving 57 mph on the right lane. LOL

 

Most PHEVs don't discharge as deeply as BEVs cause they need to keep the battery healthy enough to meet federal emissions warranties. They also have the engine to reduce battery use at times when the battery will experience more degradation, like high temps.