Hi Ken,
Quote:
Originally Posted by ken1784
Have you ever seen patent 6,573,685?
" Method of replacing secondary battery"
It says do cumulative 450% cycling and/or store battery in more than 50C environment for 5 days to recondition the NiMH battery.
I would like to recomend you do the reconditioning it before modify it.
|
I just learned about it this week. Fortunately, I've got inventory to test. <grins>
FYI, my latest cycle shows a discharge capacity of 5.3 Ahr from an initial 2.2 Ahr. The trend is still upwards so I'm continuing the discharge-charge testing. Also, I'm looking at round-trip efficiency and finding it is improving. This makes sense if the internal resistance is going down. Once the capacity levels off, I'll post the data and graphs in the usual places.
The second module has been sitting idle, clamped to the first, for the same period of time. I'll repair the leaking tee nut and do an initial calibration test. Then I'll review this patent and try the 50C test, which makes sense because the higher temperature encourages faster ion migration.
Thanks,
Bob Wilson