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Old 06-05-2009, 12:10 PM   #11 (permalink)
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Yes, you're right. But, you don't want to cycle your batteries below 50% (generally) to retain good battery life.
Ahh... your right of course. THat's the part i missed.

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Old 06-05-2009, 12:27 PM   #12 (permalink)
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Thundersky batteries don't seem to mind so much. They get 2000 cycles to 80% DoD, 3000 for 70%... I've been reading up a lot about them (I just bought a 48V 60Ah pack for my bike) and I haven't seen a reason to doubt that. I think you'll get 6-7 miles plus whatever is in the existing pack. Its interesting that they've gone for such a low voltage and used a DC-DC converter to get to the prius' 200+ volt pack.
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Old 06-05-2009, 12:29 PM   #13 (permalink)
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Thundersky batteries don't seem to mind so much. They get 2000 cycles to 80% DoD, 3000 for 70%... I've been reading up a lot about them (I just bought a 48V 60Ah pack for my bike) and I haven't seen a reason to doubt that. I think you'll get 6-7 miles plus whatever is in the existing pack. Its interesting that they've gone for such a low voltage and used a DC-DC converter to get to the prius' 200+ volt pack.
Perhaps they're running in 2 cells in parallel in each step of series to reduce the impact of a bad cell? Just a thought.
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Old 06-05-2009, 01:23 PM   #14 (permalink)
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Hi Steve,

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Originally Posted by stevey_frac View Post
I know the volt is going for a 40 mile range with 8 kwhr of battery or there abouts.
I think the Volt has a 16kWh battery pack? The Aptera 2e will have a 17-23kWh and go 100 miles minimum with 2 people, luggage and the A/C on -- ~120 if you ecodrive.
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Old 06-05-2009, 01:36 PM   #15 (permalink)
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Yeah, it all depends on the RR and CdA of the vehicle. More efficient vehicles will take less Wh/mile. I based my number (ironically I did use 250 Wh/mile) off some discussion with Darin and what he gets in the ForkenSwift.
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Old 06-05-2009, 02:37 PM   #16 (permalink)
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Hi Steve,



I think the Volt has a 16kWh battery pack? The Aptera 2e will have a 17-23kWh and go 100 miles minimum with 2 people, luggage and the A/C on -- ~120 if you ecodrive.
16 kWh but only 8kWh will be used at any given time. And i was thinking the 2kWh was the usable energy, not the total energy.

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