Hello! New to the forum here and appreciate your help in getting my battery back working again. I recently acquired a Blix Packa Genie (2 battery version), and the downtube battery (battery model Reention Dorado Plus, 48V/ 14AH) doesn't turn on. The previous owner left the bike out in a rainstorm and said after that the LEDs on the battery would momentarily light up when the power button was pressed, but the battery wouldn't turn on. At this point the LEDs no longer light up at all.
I opened the battery and check the fuses which are both good. The small board which contains the power button, LEDs, and USB charger port was heavily corroded and so I cleaned it using DeOxit. (See photos). However, upon re-installation of the board, the battery still does not turn on. What is helpful, though, is that the board has good labeling so I can see what each wire coming off the BMS does. One set of wires is labeled B-, P-, KEY, and B+. The other set of wires are labeled V-, D+, D-, and V+ (I know these to be the connections to the 5V USB port on the battery shell).
A few data points :
The battery appears to have good pack voltage and be charging normally.
- I measured voltage across B+ / B- and it measured 53.24V. I then put the battery on the Blix charger for about 2 hours. The LED light on the charger went from Red to Green over this period (indicating the battery charged fully). I then measured 54.38V across B+ / B-. Seems to indicate normal charging as far as I can tell.
- Voltage from B- to KEY is 0V.
- Voltage from B+ to KEY is approx 48 V
- Voltage from B+ to P- appears to show a loop or cycle of some kind that begins at approx 3.5V, climbs within a few seconds to 7.8V, then re-starts the loop back at 3.5V. (this is essentially the same result I get when measuring voltage at the battery's main discharge port)
Does anyone have any recommendations on where to go from here? Is my BMS toast and needs replacing?
I opened the battery and check the fuses which are both good. The small board which contains the power button, LEDs, and USB charger port was heavily corroded and so I cleaned it using DeOxit. (See photos). However, upon re-installation of the board, the battery still does not turn on. What is helpful, though, is that the board has good labeling so I can see what each wire coming off the BMS does. One set of wires is labeled B-, P-, KEY, and B+. The other set of wires are labeled V-, D+, D-, and V+ (I know these to be the connections to the 5V USB port on the battery shell).
A few data points :
The battery appears to have good pack voltage and be charging normally.
- I measured voltage across B+ / B- and it measured 53.24V. I then put the battery on the Blix charger for about 2 hours. The LED light on the charger went from Red to Green over this period (indicating the battery charged fully). I then measured 54.38V across B+ / B-. Seems to indicate normal charging as far as I can tell.
- Voltage from B- to KEY is 0V.
- Voltage from B+ to KEY is approx 48 V
- Voltage from B+ to P- appears to show a loop or cycle of some kind that begins at approx 3.5V, climbs within a few seconds to 7.8V, then re-starts the loop back at 3.5V. (this is essentially the same result I get when measuring voltage at the battery's main discharge port)
Does anyone have any recommendations on where to go from here? Is my BMS toast and needs replacing?
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