DrkAngel wrote: ↑
Oct 28 2018 9:30pm
Will test Resurrected 7s 5000mAh Floureon LiPo tomorrow.
36V 600w front hub motor runs just fine at 25.9V.
I have 7s cell monitor meter and will be able to monitor all cells for any excessive sag.
1. Cell passes capacity test
2. Preliminary, looks OK on self Discharge
3. Tomorrow will determine if C-Rate meets oem, compared to the "good" cells
Accidentally fully discharged cell seems to be fully rejuvenated!
Voltage sag and resultant voltage match the "good" undamaged cells nicely during and after a 60% discharge, used 3000mAh of 5000mAh. Final test will be self-discharge over a several-many day resting period.
I am metering with a Fluke meter with 1/1000V accuracy.
1st test at present 40% charge, if good will follow up with test at 100% (4.20V).
These 7s 5000mAh Floureon LiPo seem to have been a bargain purchase. 5 for $240 = $48 each. (370 per kWh) Price was $60 each, but due to mis-listing I got a free one.
Could build 2x 25.9V 10Ah eZip battery upgrades for $98 each, compare to oem 24V 9.6Ah LiFe offerings @ $540.
Alternatively, would make a nice 14s2p 51.8 10Ah battery for my 48V 1000w rear hub build, 48V rated at 28mph, 51.8 should push to 30mph. (1 spare)
Although they seem excellent quality, no self-discharge and equal capacity, I will add 7s BMSs for safety and longevity.