I am getting two different reading from a battery I am investigating. The press bottom on the side of the battery is only showing a single red indicator. Display however, shows three bars but it's a no-go. Can anyone shed any light on this?. BMS perhaps.
Yamaha battery issue
- Thread starter Hedgesteeper
- Start date
it could be the bms is stopping it from working as a cell or cell bank could have gone bad but you will need to open the batt to check this.
they dont sell the bms if it is that but these batts use uart programming so you can get a chip to go between a normal bms and then to the motor but no stock of those until next year.
www.allbatteries.co.uk
they dont sell the bms if it is that but these batts use uart programming so you can get a chip to go between a normal bms and then to the motor but no stock of those until next year.
Electric Bike Battery Yamaha type 522Wh 36V 14.5Ah
Order Your Replacement Yamaha E-Bike Battery 36V 14.5Ah ✓ Compatibility Guaranteed ✓ Premium Li-Ion Cells ✓ 2 Year Guarantee ✓ Buy Now
www.allbatteries.co.uk
While this is a Yamaha motor the battery is in fact marked Giant. After charging the indicator is now showing 4 bands full; 40volts on the main supply wire and 36v on the thin wire. I'm a mobility scooter man so don't understand what the thinner wire is for ; the display perhaps??.
Ah wow!. That makes sense. Thanks for the reply. I still don't understand why the voltage reading 41V from the battery pins associated with the thin wire is greater than the 36v I'm seeing from the main supply battery pins.