How I Recondition Cells

I had 5.9 Ah on this module, best I could do, Then I used the voodoo spouted on this forum, low voltage crystal removal, look at the success story below
Less capacity and lowered voltage under load.
You all do what you want lol.
RUINED A PERFECTLY GOOD MODULE
NEVER, EVER, HAVE I SEEN A MODULE REVERSE IN THIS MANNER

It used to look like the far right yellow line.
Voltage is pressure, pressure is torque, less voltage, less torque
To counteract the loss of torque requires insertion of more amps (gas pedal on the prius) insertion of more amps is faster burn less range (like using corn in your gasoline instead of gasoline)

P.S. we dont burn corn here in anything we own.

 

https://mdpi-res.com/d_attachment/applsci/applsci-09-01742/article_deploy/applsci-09-01742.pdf

 

Yes I followed the directions on this site after looking at multiple posts, well below that amount during discharge. If I had a cell reversal then it would have had anything in it to measure lol

 

Half way through, (well 1/2 through phase 2 so 75% done actually)

THE FOLLOWING IS ON A KNOWN GOOD CELL THAT HAS BEEN PREVIOUSLY CYCLED BACK INTO SOME SORT OF "GOODNESS"

Step 1- Discharge to 6 volts at a 5 amp load
Then, repeat at a 2.5 amp load
Then, a 1.6 amp load
Then, a 0.8 amp load
Then, a 0.4 amp load
Then a 0.20 amp load
Then a 0.10 amp load TO 5.9 VOLTS.

Step 2 - Charge at 0.1 amps until voltage reads greater than 7.1 volts and less than 7.2

Step 3 - Charge at 3 amps and insert 6 amp hours (approx 2 hours)

Step 4 - Charge at 1 amp until EOC is reached, this typically means inserting 2.5 amp hours on a GOOD module.(approx 2.5 hours)

Step 5 - Wait one week and discharge at 6.5 amps to 6 volts and record that capacity (looking for excess self discharge.

RECORD THE VOLTAGE AT 4 MINUTES POST DISCHARGE STEP 5, SHOULD BE 7 VOLTS OR SO, HIGHER VOLTAGES IN EXCESS OF 7.2 IE 7.3, 7.4 MAY INDICATE A DEHYDRATED CELL.

Step 6 - Charge at 6.5 amps for total of 3 Ah added to the module

Step 7 - Continue charge to EOC at 2 amps (approx 8 Ah TOTAL Step 6 & 7)

Step 8 - Discharge to 6 volts at a 6.5 amp load record that Ah delivered, this is the capacity at 1C.

PORTIONS OF THE ABOVE COULD BE USED ON AN UNKNOWN CELL, SPECIFICALLY DO NOT TRY TO ADD THE TOTAL 8 AH INTO THE MODULE FROM STEPS 6 AND 7, IN THIS CASE USE THE RESULTS FROM THE OUTPUT OF STEP 5 TO ADJUST THE AMPS IN FOR STEPS 6 AND 7 LOWER IF NEEDED. RINSE REPEAT

 

You are correct on the dealerships and most of the rebuilders.

The big mistake Toyota made was in not designing the modules to be serviceable and in not setting up SOME large dealers as service centers to provide module level service with SLIDE IN modules. Not knowing if the public would accept these hybrids probably factored into all those decisions which would have added more costs, but benefited everyone long term, bean counters, they ruin everything.

 

Translation, U.S. cleaning MAY help break down resistance in the cathode anode but doing it for more than 6 hours may destroy the module, this 6 hours was based on an unknown size module/cell at an unknown U.S. frequency. I have requested the full text of the paper from the author in China, good luck lol.

Another option is sulfuric acid

Ultrasonic method was used to recycle nickel/metal hydride (MH-Ni) batteries under undestroyed state. The effects of ultrasonic on electrode material performance of MH-Ni batteries were investigated by using SEM, EDAX and XRD. The results indicate that with the ultrasonic time increasing, there are obvious dispersing phenomena in the positive and negative electrodes. This can make the inertia oxidation layer break off from the negative electrode, and the fresh surface comes out. These changes can increase the reaction centers of the active materials, as well as improve the catalysis capability and discharge ability. But if the ultrasonic time is too long, it can make the active materials reunite and accelerate its pulverization, and lead to its degradation. The improvement of electrochemical performance for MH-Ni batteries is obvious by ultrasonic for 6 h continuously.

 

MODULE SWELLING - should be avoided, place a business card just barely into the top sides of the module, if it falls out, stop charging for 3 hours (assuming you were charging at 5 to 6.5 amps) . If nearing end of charge at 2 amps or less, you have to decide, is it close, or should I stop allow a cool down and restart the low charge to achieve end of charge and internal cell balance. Common sense rules

 

lol 1 900 pay as you go, yes I fly too, thats why I had a handy dandy tool to swage the battery wires lol

Read a book, taught myself lol

 

automation, yeah, i do automation, for 20 years, i could automate all of this from start to finish, go get the funding

I also have a one man no touch hay making operation, I never touch a bale of hay and I am the only person involved from cutting to stacking lol, i specialize in eliminating labor, people hate me

 

They were all mostly running like 3 Ah when I started, many had been conditioned 3 years ago and then sat. some were ones I just got from someone that pulled them, all were unusable without some intervention cycling and grading.

Lol on the other laptop that is used for all of this, are hundreds of graphs going back years. Insight and Prius modules / sticks

 

The waiting a week is to identify any modules suffering from EXCESS DISCHARGE that would then create havoc in the pack later when the car is parked an extended period.

I like my work above

Proof is in the results, most of these modules have previously been restored and placed in service for tens of thousands of miles by me, never did they provide 6.5 Ah capacity, now most do

For those that did so, I am glad you unfollowed me, I recommend others/everyone do the same

 

Lmao YEAH MAN I AM NO WELDER

But what I am is someone that can find and execute a solution that works

Three years later, that hay fork still works
And it has saved me HUNDREDS of hours of paid labor
I therefore grade that welding a huge success

P.S. That terrible welding has lifted and stacked 5,400 bales of hay, TWICE, onto the trailer, off of the trailer, maybe you cant rate good welds from bad welds ?