New consulting relationship with GreenTecAuto begins
What actually goes wrong with the batteries????
Using the charger to run a deep discharge
Time to get serious about determining what actually fails in the sticks
A better way to test a full pack on the stick based level
What happens when you discharge completely?
Setting up to watch the sticks
First results
Recovery after the deep discharging.
More deep discharging.
Connecting to all the sticks with the multimeter test fixture
A graphical look at silver pack deep discharge 2
Testing a pack of new MaxIMA sticks with the multimeter test fixture
The next discharge after a regular plateau based recharge
Subpack 1
Subpack 2
Subpack 3
Subpack 4
Subpack 5
Subpack 6
Subpack 7
Subpack 8
Subpack 9
Subpack 10
Zap test of MP 10
Subpack 11
Subpack 12
Subpack 13
Subpack 15
Subpack 16
Subpack 17
Subpack 18
Subpack 19
Subpack 20
A look at todays Hybrid and EV battery packs
Battery packs exposed
Keeping Warm In New England
Plugging into the SUN
Making a small solar concentrator
Building MIMA and the plug in adapters
Converting a telephone truck to electric
DIY dual pulse Capacitor Discharge Spotwelder
Chevy Bolt EV joins the family
Getting in shape while making electricity
Replacing gasoline with solar electric lawn equipment
What is Genesis One?
How to stop the aging process DIY
MIMA Install Day 2005 a Big Success!
Building a hybrid car grid charger
Tapping into the Wind
Expanding MIMA with the Distribution board ( users projects )

The next discharge after a regular plateau based recharge

The next discharge after a regular plateau based recharge
looks better after the deep discharge, very interesting.

Recharged the pack overnight, and we see that the pack not only had more capacity, but the sticks tracked each other much better on the discharge, until the same stick 3 dropped out. The reversal of the cells during the really deep discharge does not seem to do any damage (need more cell level analysis to be sure), and the sticks seem to be much better matched.
If you have a pack that has not responded well to the standard charger settings, it may be worth giving this a try?
1. enter password(call or e-mail me to get it)
2. change the MinDischV* to a voltage below 1V/cell.
3. set mode to 6
4. option bit 7 set to no precharge
5. with discharger connected, press start.
6 when the discharger turns on, press the test key
the message SlopeStopDisable now turned ON will be displayed, and the discharge will proceed to where it would have stopped, it will start beeping at you, but not stop until the pack is fully discharged to 10V, then it will recharge. The SlopeStopDisable will remain active, and since you cannot turn it off while recharging,you will not be able to turn it off until the next discharge cycle starts.
You could let it deep discharge for 3 cycles, turn the SlopeStopDisable off on the next discharge cycle, or change the number of cycles to 1, so you only get one cycle.
At this point, this procedure is experimental, and we have no idea if the reverse charging does any long term good or harm, but if your ready to give up on the reconditioning anyways, this may be a way t6o at least get all the cells to see a deep discharge.
I will follow this test with some more detailed cell level analysis very soon.