Thank you! Yes, what about discharging by say plugging in a 600W light bulb to the new leads and discharging it to what V level? And then recharge with active cooling? To speed up the process? I've disconnected all sorts of stuff and it still discharges so I don't think it's a parasitic drain, I guess I was hoping to recondition the cells through several discharge/charge cycles?

 

This rarely works. Self-discharge is not improved by "cycling". Cycling only improves capacity.

600W discharge to low voltages will likely damage/destroy any marginal cells. YOu will need to charge for 5500mAh * 1.6 / 350mA = 25.1 hours to ensure all cells are at 100% SoC. If you monitor the battery, you can discharge at any rate down to 250V PROVIDED DEL_MOD_V is less than 0.3V. If Del_MOD_V exceeds 0.3V, limit discharges to about 20W to 200V. Slow is your friend.

Again, "You either have a parasitic drain on the HV battery, or you have a battery failing in self-discharge. Neither are typically helped by charging/discharging."

 

My del-mod-V has already been closer to 0.6V during the Rmode Rebalancing last week. I am a bit confused though because in "limiting discharges" you have to go to an even lower voltage, 200V instead of 250V? So I don't understand the discharge of 20W to 200V, can you explain that a bit more? Thank you!

 

With a DEL_MOD_V of 0.6 during the rmode rebalance, you're battery likely has one or more failed/failing cells.

The other questions are moot. Charge @ 350mA for 25 hours with active cooling. If DEL_MOD_V doesn't improve, the battery is done.

 

I'm not sure I'm following how a HV pack issue is being resolved via the jump procedure. That sounds like like a 12V battery problem...

If I have low traction pack voltage (does happen on occasion - something in my system seems to stay active once every couple months and drain from 45% to mid 20s SOC overnight...otherwise fine) the startup sequence is more or less unaffected, but the engine kicks on IMMEDIATELY, which is usually my only clue that the NiMH pack's voltage is low.

If the contactor isn't closing at Key ON (you said no start), my first measurement would be 12v battery voltage. I am under the impression the jump procedure is allowing the HV battery to close that contactor and subsequently use the DC/DC convertor to charge the 12V system.