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>Tim Grewe, GM’s Global Electrification and Battery Systems Director, told Car and Driver that the Ultium pack does not suffer capacity loss from excessive DC f

>Tim Grewe, GM’s Global Electrification and Battery Systems Director, told Car and Driver that the Ultium pack does not suffer capacity loss from excessive DC fast charging, so GM will not advise users to charge the pack to less than 100 percent. Translation: we can get higher spec cells now, so battery capacity will be over-rated. A "100 KWh" pack will be 120 KW+. When it says it's fully charged it's actually sitting at a nice conservative 80% SoC. You could fast charge it every day because the pack is so huge that 100 KW is a nice gentle 1C charge rate. You can push the warranty out further because you have more headroom for battery aging. Presumably when the car hits three or four years old it'll set a charge threshold at 80% and start warning you about fast charging. (Or maybe not? It would be in GM's interest to let you run it into the ground like a cellphone)

psudox 5y ago
They’ll probably give owners a setting that controls this. Maybe it appears after x years or kilometres? Interesting new EV UX issue for them if they do upsize the battery packs. This is similar to Apple’s degraded battery CPU throttling where they would throttle and not give you any choice or awareness of it. Now, when your battery ages, you can choose to run it into the ground with max performance.
- Abishek_Muthian 5y ago
  >Now, when your battery ages, you can choose to run it into the ground with max performance. Haven't used an iPhone in a while, But I thought the charge cutoff happens automatically at 80% if you plug in overnight and continues charging before you wakeup? Is there an user control over this now? Anyways for android users who wish to have control over battery charging on you can use 'AccA'[1] to charge from 40-80%, including temperature related CHANGES. This way you can charge your phone overnight on a low voltage USB (Slow charge) and prolong the life of that battery even further. [1] https://github.com/MatteCarra/AccA https://github.com/MatteCarra/AccA

psudox 5y ago

They’ll probably give owners a setting that controls this. Maybe it appears after x years or kilometres? Interesting new EV UX issue for them if they do upsize the battery packs. This is similar to Apple’s degraded battery CPU throttling where they would throttle and not give you any choice or awareness of it. Now, when your battery ages, you can choose to run it into the ground with max performance.

Abishek_Muthian 5y ago
>Now, when your battery ages, you can choose to run it into the ground with max performance. Haven't used an iPhone in a while, But I thought the charge cutoff happens automatically at 80% if you plug in overnight and continues charging before you wakeup? Is there an user control over this now? Anyways for android users who wish to have control over battery charging on you can use 'AccA'[1] to charge from 40-80%, including temperature related CHANGES. This way you can charge your phone overnight on a low voltage USB (Slow charge) and prolong the life of that battery even further. [1] https://github.com/MatteCarra/AccA https://github.com/MatteCarra/AccA