BEV battery technologies changing fast

time2roll wrote:

pnichols wrote:
Note the estimated recharge lifetime of only 1000 cycles.

This is not anywhere near enough - in my opinion. If one was to "top up" their EV battery once a day every day - just to feel good with regards to always leaving home with their EV battery at the 100% charge level (like we do with our smartphones) - then the EV battery would only be good for a little over 3 years (3 X 365 days = 1095 days = 1095 recharge cycles).

A charge cycle life of 3000 or more cycles would be more like it ... to go along with the estimated 800km EV range.

Charge cycle is based on 100% discharge equivalent. So the 400 mile battery goes 400,000 miles before replacement. Most vehicles are long done before that mark.

Using 100% cycle is also the worst way to treat a battery. Since few people drive 400 miles every day most users will only run 70-80 percent cycle, charging at home on a regular basis using a moderate charge rate. This could easily stretch battery life past 600,000 miles.

You are thinking inside the existing lithium battery IP...liquid

This is outside of that box...this IP is solid state

They claim 50% smaller in volume and higher power density


Note on this graph where solid state is in reference


https://images.app.goo.gl/bN4znPWGJT998WMY6

Meaning they can package in less space and have same/similar power...or in same/similar space and have double the power

Plus, the form factor is different from the current cylindrical lithium battery. Meaning that bag is more space efficent, but no data yet on how they will manage the thermal system


2plus...since better firm factor...less wires/terminations/etc. I've not found any packaging form factor information yet

Current info summary...

Higher power density

Smaller form factor. Half the space with same rating...or same space with double the rating

Charges faster

Lower cost materials and lower cost to manufacture

Cost and size is still a major component...That's great if it can do 600miles on a charge but if the battery pack costs $50k, it's a non-starter.

Also, to get 600 miles, how big is the battery pack. If you have to replace the back seat with a battery pack, that's a major trade off. For trucks to get 600miles, particularly fully loaded or towing, could still mean a massive size and weight factor.

It does address the fast charging issue as 600miles is 8-10hrs of driving, so that should address probably 95% of long road trips as long as you can find an overnight charging station to park at.

BenK wrote:
GM's new battery news is exciting

Great that they went outside the box in form factor, but the risk as always...will this become a commodity level form factor...AKA Beta vs VHS

One of the why's OEM'S wait to let the scouts
to the arrows and financial risks. Though if successful, the risk becomes huge returns

Here is an exciting one https://news.samsung.com/global/samsung-presents-groundbreaking-all-solid-state-battery-technology-to-nature-energy

My favorite, saline batteries, has stalled on their electrode tech

Hope Tusk's giga factories can be retooled quickly...and if he has a retrofit plan.

You know what they say:
if something sounds too good to be true ...

Let us know when GM has as many EV cars on the road as Tesla
Id bet any money it wont hapen ever

jdc1 wrote:
Dang....I was set to purchase an EV next year. Because of this rapidly changing battery world, I might have to wait a couple of years. Can you imagine not needing a charge on an EV for over 600 miles? I wonder if the charging world will be able to keep up with the battery technology advancement rates? I might have to add more solar on my home because of this too.

Will not take additional power unless you drive more miles. Just as a truck with the optional larger tank does not use more fuel unless you drive more miles. You just fill less often.

pnichols wrote:
Note the estimated recharge lifetime of only 1000 cycles.

This is not anywhere near enough - in my opinion. If one was to "top up" their EV battery once a day every day - just to feel good with regards to always leaving home with their EV battery at the 100% charge level (like we do with our smartphones) - then the EV battery would only be good for a little over 3 years (3 X 365 days = 1095 days = 1095 recharge cycles).

A charge cycle life of 3000 or more cycles would be more like it ... to go along with the estimated 800km EV range.

Charge cycle is based on 100% discharge equivalent. So the 400 mile battery goes 400,000 miles before replacement. Most vehicles are long done before that mark.

pnichols wrote:
Note the estimated recharge lifetime of only 1000 cycles.

This is not anywhere near enough - in my opinion. If one was to "top up" their EV battery once a day every day - just to feel good with regards to always leaving home with their EV battery at the 100% charge level (like we do with our smartphones) - then the EV battery would only be good for a little over 3 years (3 X 365 days = 1095 days = 1095 recharge cycles).

A charge cycle life of 3000 or more cycles would be more like it ... to go along with the estimated 800km EV range.

GM has an eight year warranty on the battery. So I am not sure what constitutes a cycle, but I cannot believe that you can kill the battery in 3 years.

But I will see, since I just got one and will have it for 36 months.

Note the estimated recharge lifetime of only 1000 cycles.

This is not anywhere near enough - in my opinion. If one was to "top up" their EV battery once a day every day - just to feel good with regards to always leaving home with their EV battery at the 100% charge level (like we do with our smartphones) - then the EV battery would only be good for a little over 3 years (3 X 365 days = 1095 days = 1095 recharge cycles).

A charge cycle life of 3000 or more cycles would be more like it ... to go along with the estimated 800km EV range.

The future will be interesting!

Dang....I was set to purchase an EV next year. Because of this rapidly changing battery world, I might have to wait a couple of years. Can you imagine not needing a charge on an EV for over 600 miles? I wonder if the charging world will be able to keep up with the battery technology advancement rates? I might have to add more solar on my home because of this too.