2016 and 2017 Li-Ion Battery Longevity

I recently sold my > 6 year old 2017 gen 4 Prius 4 with about 20k miles. It had a Li-Ion battery.

There hadn't been any noticeable change in fuel consumption or battery charge/discharge behavior.

I was wondering about how the battery would fare as the Li-Ion battery is not much more than 50% of the capacity of the NiMH one (750Wh vs ~1300Wh), so it will probably cycle more.

kw

 

li-ion batteries last about five time longer than NIMH. NIMH isn't tried and true it's old and worn, (Toyota is very resistant to change and still hasn't fully invested in electric) but it is still used in the AWD Prius because it has better cold weather chemistry than Li-ion so.......

 

My 2016 had the LiOn battery pack. It performed well until 2020 when a kamikaze deer totaled it. My 2020 AWDe has the older NiMh battery pack and it, as I expected, is still doing fine.

I previously had a 2004 Prius with the NiMh battery pack. The pack lasted 195k miles (9 years) and only one module failed at that time with one bad cell. A commercially rebuilt battery was still operating well at 12 years and 280,000 miles.

LiOn batteries can handle 200-500 full discharge/charge cycles before weakening to 80% capacity. In a Prius HSD, this should easily allow for a 10 year, 150k mile useful life, but the older NiMh batteries have proven that they perform well.

If you really want to have a reliable, long-lived hybrid battery system, use LiFeSo4 batteries which can handle 10 times the discharge/charge cycles (2000-5000) than the LiOn batteries.

JeffD

 

my 11 year old lion battery hasn't lost much capacity. i suspect the prime battery will outlast the car

 

It is interesting to note that EV makers are using LiFeSo4 Batteries as the lower cost (lower range) option. The battery packs with a higher KWH spec are LiOn.

JeffD

 

is that tesla?

 

Yes, but they're not alone. Toyota's EV plans for 2006 are similar.

JeffD

 

is it also because the chemistry qualifies for the tax credit?

 

The only mineral that is relevant is that LiFeSo4 batteries do not contain cobalt.

JeffD

 

Actually Toyota has a completely different plan and just now started testing these new batteries and plans to bring them to mass production market by 2027. If they pull it off they will be the first to sale with solid state batteries...
Toytota and Idemitsu Kosan Partner to Mass Produce Ultra-High-Range EVs with Solid-State Batteries

 

Solid state is Toyota's longer term plan. Their interim plan is similar to Tesla's.

JeffD

 

Sorry but again completely disagree. It's been widely published that Toyota has not fully invested in EVs, and 2027 is basically three years from now so that is not long term(especially since they just start real world tests of these solid state batteries). They are still spending money researching and developing hydrogen and alternative fuel sources, as well as spending the last three years developing a new type of automatic racing transmission the DAT for the new GR cars and racing applications. Maybe from a perspective of what type of battery cells they are using they have a similar plan, but overall Toyota is much more diversified than that for the future and hasn't really committed to one single strategy yet.

 

Mine is 2016 Prius Four Touring bought March 2016, still getting 75MPG in ECO mode, been it that mode since day one. I have replaced 12V battery in 2020 and new set of tires this year. So far, no loss of mileage or anything hope my Hybrid pack it will last till 200K.

Cheers.
MrMPG

 

Surely you meant LiFePO4? (Phosphate not sulphate).

kevin

 

You are correct.

JeffD

 

My 2017 Prime still did 42 km per charge with my summer tires last summer. Winter tires at mild temperatures drops this to 36 km. Next week, I'm putting back my summer tires. I'll see if the range has remained 42 km from last year with these tires.