reviving a dead BionX battery

[krazykraut3711]

Hi guys, I hope this is the right place to ask. I got a full BionX kit (PL350 motor, 36 V Battery, charger, no controller or cables) for a good price on eBay. The battery hasn't been charged in a few months, and the charger doesn't recognize it anymore (just a solid red led). From what I understand, the battery must have a minimal charge before the charger will recognize it. What is the best strategy here? Please help.

- Krazykraut

 

[tude647]

Glad I came across this thread.
I have a Bionx battery pack, 11S3P. The voltage on the battery pack was ZERO.
The original charger has a microprocessor in it, which seems to monitor the voltage and drive the charging current accordingly.
When it detects such a low voltage, it supplies current on and off. The voltage went up to 8V after 2 days of trickle charge at around 35mA.
I bought a DC power supply to try and revive the battery at 200mA like you did. Will post an update here in a few days.

 

[marty]

Im not Sure how to put the battery into Regen if I cannot get it to turn on can someone please help me with this how do I regen the battery?

3.) this method doesn't work for you. but here is instruction. Put the entire bike/system onto training stand, pedal it and regen the battery, once the voltage is up, you can then use normal charger to charge it.

Ken

If you try to regen it, then you don't have open up the battery, but you will need a training stand. It will be a good workout for you.

Ken

 

[tude647]

Glad I came across this thread.
I have a Bionx battery pack, 11S3P. The voltage on the battery pack was ZERO.
The original charger has a microprocessor in it, which seems to monitor the voltage and drive the charging current accordingly.
When it detects such a low voltage, it supplies current on and off. The voltage went up to 8V after 2 days of trickle charge at around 35mA.
I bought a DC power supply to try and revive the battery at 200mA like you did. Will post an update here in a few days.

My lab power supply arrived.

I set the current limit at 0.2A and hooked it up to the battery. A couple hours later the voltage is around 34V.
YAY!
I briefly connected the original charger. It charges like a beast, and I can hear the cooling fan running, but batteries run a bit hot, so i decided to revert to the lab PS and give it 200mA until I reach 40V.
Thanks to everyone who contributed to this thread!