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Posted by Bob & Holly Wilson on January 6, 2008, 10:19 pm
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> I'm impressed. A few times in my distant past it became
> necessary to identify and replace a bad cell in a
> high-voltage series set, and it rarely worked as well as
> the original. That was probably due to careful matching.
>
> It will be great if you provide more information as time
> goes on...
>
> Nice!
Thanks!
What I did was ship the battery fully charged, this means above the
standard 80% limit. The instruction to the user was to discharge the
cell assembly until the no-load voltage matched that the of the adjact
cells.
Normally, our Prius battery packs wander between 40-80% but sit mostly
at about 60%. This means there is 'head room' so imperfections between
the cell assemblies seldom leads to over/under charge conditions.
But battery assemblies that run closer to 100% down to 0% are especially
sensitive to balanced cells. In fact, it would be nearly impossible to
achieve long battery life if all of the cells has to match at these
extreme charge ranges.
Bob Wilson
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