BMW EV achieves 1000km in range using Dual-Chemistry batteries
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Re: BMW EV achieves 1000km in range using Dual-Chemistry batteries
#2How do the charging times compare? That’s the deal maker/breaker for long road trips greater than 500 miles, or shorter trips where you use all the accessories, encounter lots of hills, etc not possible on a dynamometer.
Re: BMW EV achieves 1000km in range using Dual-Chemistry batteries
#3This took a few reads to parse. There are two kinds of batteries: (1) a low-density LFP that has a great lifetime, (2) a simulated manganese using Nickel manganese cobalt that has a poor lifetime but great density. The former cycles frequently for short trips, and the latter recharges it during the long ones.
Re: BMW EV achieves 1000km in range using Dual-Chemistry batteries
#4> 1000km
621 miles
Re: BMW EV achieves 1000km in range using Dual-Chemistry batteries
#5> 1000km 621 miles
540 nautical miles
Re: BMW EV achieves 1000km in range using Dual-Chemistry batteries
#6How do the charging times compare? That’s the deal maker/breaker for long road trips greater than 500 miles, or shorter trips where you use all the accessories, encounter lots of hills, etc not possible on a dynamometer.
Well, I really think 500 miles is too high of a lower bound, but when you reach 1000 km, it stops mattering again. This is about how long you can travel before stopping to rest.
Re: BMW EV achieves 1000km in range using Dual-Chemistry batteries
#7This took a few reads to parse. There are two kinds of batteries: (1) a low-density LFP that has a great lifetime, (2) a simulated manganese using Nickel manganese cobalt that has a poor lifetime but great density. The former cycles frequently for short trips, and the latter recharges it during the long ones.
That's pretty clever.
It leverages the fact that most people make a large number of short trips, and a smaller number of long trips.
Also if it's modular enough, this design could allow replacing one or the other battery if the user does lots of short trips, or lots of long trips.
Also could let the manufacturer do market segmentation, e.g. a high performance model with no LFP, and both parts of the "high-performance" chemistry - and a base model that's 100% LFP.
Re: BMW EV achieves 1000km in range using Dual-Chemistry batteries
#8BMW, build a charging network. That’s really the most consequential thing for drivers.
Re: BMW EV achieves 1000km in range using Dual-Chemistry batteries
#9This took a few reads to parse. There are two kinds of batteries: (1) a low-density LFP that has a great lifetime, (2) a simulated manganese using Nickel manganese cobalt that has a poor lifetime but great density. The former cycles frequently for short trips, and the latter recharges it during the long ones.
You need more LFP to carry the weight of the manganese battery though (increasing cost), and all the extra weight can affect driving dynamics. Maybe both the cost and weight increase are minimal but that’s what came to mind. It’s a great idea though.
Re: BMW EV achieves 1000km in range using Dual-Chemistry batteries
#10How do the charging times compare? That’s the deal maker/breaker for long road trips greater than 500 miles, or shorter trips where you use all the accessories, encounter lots of hills, etc not possible on a dynamometer.
This would do that trip without a charge stop, so it doesn't really matter? Even if your trip is 1000 miles, surely you could find 30 minutes to stop along the way?