The exact battery description:
14S Sanyo cell 51.8V 52V 17.5Ah Li-ion Battery 48V 1000W Electric Fat Bike Hailong Battery
This was the vendor:
https://unitpackpower.aliexpress.com/st ... 4c4dDlXijT
Yes, the batt is recognized by the tsdz2 at 58.8V. That's definitely new behavior. If I previously charged this battery to 58.8 the tsdz2 wouldn't power on until I dropped the voltage to 54 or so by running an incandescent bulb off of it. At that point I could run it with the TSDZ2, but it would do the cutting out after a few minutes thing, so I assumed that problem was also related to the 48V/52V mismatch. Apparently its something else because it's still happening even after flashing.
The battery cuts out after 10-15 minutes not miles. My 48V 10Ah battery can do the whole trip I just did at full power, so I'd assume that the 52V 17.5Ah battery should be able to too. But again, on a fresh charge with the 52V batt, it'll run for 10-15 minutes, then cut out. I restart, get another few minutes, then fewer minutes, then seconds between cut outs. Same behavior as before flashing.
Interestingly it doesn't necessarily cut out under load. It may, but it'll also just shut itself down while coasting or at a stop light. Perhaps it's just a loose connection somewhere, bad controller, a dead cell? The fact that the batt still reported 53.3V to my charger after I drained it for a good 8 miles (and about 30 reboots) makes me think that the cells aren't phoney. Or hope anyway...
Another data point- the battery sometimes feels "jerkier" than my 48V, like the power wanes and surges, especially before cutting out.
Sigh. I can see myself having to completely disassemble, test every cell, and re-wire this effing thing. Just what I need, another project.