Quote:
Originally Posted by AGR
One question, how do you test a battery pack, on the assumption that one is buying a used Volt/Fisker/Whitestar with 40,000 miles how do you know how long the battery pack will last?
Is anyone going to log how often the battery pack cycled?
What depreciation guidelines would be applied towards the battery pack? Same as the rest of the car?
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To test it, you build a battery pack and attach it to a test machine to simulate realistic loads. The pack doesn't get moved at all, just charged and discharged to various points, maybe heated and chilled, etc.. if you track all the details, you'll end up with a nice lifecycle chart you can base your recommendations upon. You can compare the results to other cycling patterns to figure out what is healthiest for the battery.
Tesla is probably doing this already for WhiteStar, and already has done it for the Roadster battery system.
-Ryan