my hybrid automotive issues with reconditioning

give @jeff652 a call. he is usually quite helpful.

 

The instant you stop discharging, the battery voltage will bounce back up 20 volts or so in a minute or less, if I remember right. But it's like a surface charge and if you try discharging again, it'll go back down just as fast as it bounced up. Standard procedure is to let it charge till the voltage levels off and continue charging for several more hours. When you finish a discharge cycle, charge it again and forget about the voltage bounce.

Also, 235 volts sounds like all the cells might not have filled up. You didn't define a "while" but it needs to keep charging for several hours. The charging instructions on the web site say:

"Once the battery becomes 'full' the balancing process will begin. During the 'balancing' phase you will most likely see a steady voltage reading or a very slow oscillation of voltage - perhaps a 1-3 volt swing over several minutes. This means the battery is in the balancing phase. The initial balancing can take 4-12 hours after the filling phase is complete. Subsequent balancing sessions will likely be much shorter, perhaps 4-6 hours after filling is complete."​

As @bisco said, give Jeff a call and talk it over with him.

 

shoot jeff a pm, maybe he is looking at his email.

 

With the smart Discharger if it is idle, you’ve hit 134 volts .

Charge it back up.

That is your objective: 2 cycle reconditioning, one cycle?

Good luck and keep us posted .

 

Nope, sounds normal .

I’d let it finish charging up for a couple more hours (look for a change in voltage of a volt or 2 and if none, call it good) then punt for a later date if you want to do more.

The key to finishing in a 3 days weekend is to time when things happen. I get a 2 cycle reconditioning done in about 60-64 hours, starting the top end balance Thursday night and then the first discharge starting Friday morning. Usually done Sunday afternoon .

Here’s my thread for your reference:

2010 Prius II HV Battery Reconditioning

Good luck and keep us posted .

 

Keep in mind, too, that what you've already done does provide some benefit. And don't forget to let it set for at least an hour after charging before you put the car in Ready mode.

 

metricmotomike - Maybe I can simplify this a little for you. It's going to take a full week to do a really thorough reconditioning, not just a weekend. If your battery was showing weakness, 24 hour charge cycles are most likely not long enough the first time around. Something in the order of 40-45 hours is probably in order. It takes longer to knock some of the crystallization loose in the battery pack. I've had mine show voltage increases after staying at the same number as long as 6 hours.

Yes, the numbers will rebound upward immediately upon reaching the target goal while discharging. Ignore it, plug in the charger and move on to the next step.

After you've done a reconditioning using the longer charge times, it's okay to reduce future charge times based on what you're seeing on your screen. If it looks reasonably good, shorten the charge times to 20 or 24 hours the next time you recondition.

Since you already drive pretty carefully, note that things like tires and a weak 12v battery will affect the MPG much more than the conditioning will. Also, while driving carefully, don't try to drive keeping the car in the "battery only" mode on your screen. That only drains the battery quicker, forcing the gas motor to fire up to charge it back up. Not the most efficient way to drive the car.

Don't expect the reconditioning to make a major impact on gas mileage. My experience has been that the reconditioning process only added 1 - 1 1/2 miles per gallon.