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Discussion Starter · #1 ·

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Good find, it does say "PRELIMINARY" specs in the Jan1...Also of interest: "0-30 mph: 2.9s (75% SoC)" Wonder if SoC trigger intentionally built into the car to keep range up and what the 0-30 is with let's say 50% SoC?
 

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I wonder how many thousands of engineering hours it took to design out that 17 lbs. ;)

Every bit helps. :)

Also of interest: "0-30 mph: 2.9s (75% SoC)" Wonder if SoC trigger intentionally built into the car to keep range up and what the 0-30 is with let's say 50% SoC?
Are you suggesting that they'd purposefully/artificially limit the available power at lower SoC in order to improve driving efficiency and extend range? That doesn't seem too plausible to me.

I take that part about "75% SoC" to mean that at lower SoC the pack voltage will also be lower and therefore you'll be able to get less power out of the pack at a given current (P=V*I), and so if the max current is kept constant over a range of SoC's and pack voltages, then max power and acceleration would decrease with lower SoC. (I could be way off base on this tho.)

IIRC, we don't see similar performance drop offs with the Volt. Although the Volt will use a much narrower SoC band than the Bolt with less voltage variation, and it may be that the Volt allows higher current at lower SoC to offset the lower voltage to maintain consistent performance, even if this might mean slightly limiting performance at higher SoC. (Just a wild ass guess.)
 

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The 0-60mph is listed as 6.3 at a full charge and slower at lower charges also, so it is probably a difference in voltage when partially discharged.
 

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17 Lbs lighter?

Guess the owners manual is only available as a web download now :D
Or a turkey was hiding in the secret hatch compartment and just got dropped off for beheading. :p
 

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chart of 0-60 time requirements over the driving range per GM's SAE paper on the Bolt propulsion system:

Text Line Parallel Font Rectangle


Note that lower than 50% SOC, there may be a substantial drop-off in 0-60 acceleration.
 
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