marshallinwa wrote:My guess is that even the PHEV vehicles will have DC charging as an option with in the next couple of years and we will see the replacement of the level 2 chargers with 24 KW DC chargers in parking garages and local businesses.
I thought tat as well, till a friend explained it doesn't work that way. Charge rate of the batteries is limited by the size of the battery pack.
If you can get 90 miles of range on a fast charger in 30 minutes on a Bolt, thats because in the middle of the battery charge state range you can put about a 30% charge into the batteries in that amount of time without cooking them. If you tried to fast charge a Volt with the same current you could not fully recharge the batteries in 15 minutes, that would kill the batteries. Instead you could add about 30% of the total range max in about 30 minutes, and like the Bolt the charging would have to slow way down once the charge rate came up over about 75%.
The charge rate of the battery pack is limited to the size of the battery pack (and also by chemistry, active cooling of the batteries, etc).
PHEVs with their smaller batteries can probably be charged a little faster, but not much. Remember that if you regularly used DC quick charging on your Bolt it would degrade the batteries faster than just using level 2. The same would apply to trying to Volt et al. If you always charged them at peak charge rate you would affect the life of the batteries.
There are some Tesla drivers in particular who supercharge regularly, and Tesla in general seems to be more willing to cook the battery packs that GM is. Note that Teslas are seeing notable range loss over the years, while the Volt is very conservative in both charge rate and percentage of battery accessible. Some Volts are now over 400k miles with no battery loss.
Not sure the Bolt will fare quite as well, as they use more of the battery capacity, but that's why I leave my car in hilltop reserve mode most of the time, and very rarely use DC quick charging. Then again - I purchased. If you leased your car you probably don't care about pampering your battery.