How I Recondition Cells

I have another possible explanation, I am examining it now, will take a day.

 

I cycled module 16 three times. it had a higher resistance than the 2004 2005 modules, i took it down and drained the 6 volt area between the 2 and 3 cycles, resistance lowered and Ah increased. Lower voltages on charge and higher voltages on discharge.
Total Ah inserted in cycle 3 was 8.2
Total Ah produced was 5.988
Charge efficiency 73 % which is terrible.
Cycling again now

Discharge at 6.5 amps to 6 volts



Charge to 90%, 6.5 amp rate and insert 6.5 amp hours
Then, follow with up to 3 amp hours inserted at 2.2 amps. Allow charger to determine end of charge or use a meter and cease charge when voltage begins dropping and hits at least 100mv drop.



Multiple drains to 6 volts, do not recharge between each of these, just keep bleeding all the voltage out. Using less and less amp load.

 

I didnt soak them

I didnt soak them or get as much water in, I used a vacuum pump and got them in via the vent, I didnt look at the link but i think it said it didnt work ?

This time, it did have an effect, probably due to more water and a good soak ?

 

lol in that thread a guy states ""The passages are so small, gravity will not overcome the surface tension of the water. The need to displace any water with air from adjacent cells further resists water migration. Water has to go one way and air needs to go the other way. Gravity will absolutely not overcome these two factors."

he is correct ( he is also my shadow on that forum, and told me you cant use prius modules in an insight for about 20 reasons, he had to comment on EVERYTHING I did , extreme bore )
THIS TIME I USED A PERSONAL VIBRATOR, THAT WAS THE TRICK TO OVERCOME THE SURFACE TENSION.

 

CORRECTION
The modules above are NOT 2008.
The 2008 modules, the loose ones i bought out of the back of a car on craiglist, those were installed in the 2008 we just bought this Summer with the stolen cat.

THESE modules are from the 2008 with the stolen cat, they have never been tested or worked. I am cycling them now while I bale hay, multitasking. They are coming up pretty good but one is dead bang bad with only 20% capacity.

These are the ones that have the weirder discharge curve and maybe 0.05mU higher resistance than my 2004 2005 modules.

July 29, 2007 modules from a 2008 car all in serial sequence.

I am using the 6.5 amp charge for 6.5 ah in, followed by up to 2.5 more amp hours in at 3 amps, seeing some slight swelling on some of the modules, so i am going to back it down to 2.2 amps instead of 3 for the final top charge.

This is actually the first cycle on these and they are coming up 5.1, 5.5, 5.5, 5.5, 5.5, 5.8, 5.8, 5.9, 5.9 so not too bad

The range for Ah in has been 7.3 to 8.3

 

So far I have about 16 of the 28 2007 modules graded. While doing that, mom decided to "help" getting in the hay, and took off raking, in highway gear, up and down the hills, now, the tractor wont move. So I lacked a project, like fixing my insight, so now I can go and split the tractor in half after I remove the loader, and put in a new clutch, after I machine a clutch pilot tool on my lathe, cause they have no pilot tool for this new holland newish tractor.

She pulled up on the atv while i was baling "I didnt finish cause the tractor smells and it wont move"

Oh, and because she took out our loader, I had to drive the truck around and manually pick up 250 bales and put them in the barn, 10 minutes after I finished, it's raining, lucked out.

 

module swell sensor to stop end of charge if swell is detected
in the simplest form, just add a relay, and route one side of the charger through it, set a SENSE POINT for the detector at which point it breaks the charger connection, only a relay is needed to be added to what is show below.

https://arduinogetstarted.com/tutorials/arduino-force-sensor

 

Just a teaser, this is a few of the 2007 modules, first pass,

GREEN are 90% or better, BLUE are 85% or better, RED are under 85%

 

Modules are charged in two phase, after being discharged first at 6.5 amps to 6 volts
Phase 1 inserts 6.5 amp hours at 6.5 amps
Phase 2 inserts up to 2.5 more amp hours at 2.5 amps.

Phase 1



Phase 1 zoomed at 50%



Phase 2 - Sometimes I was not there to immediately initiate phase 2 charge, hence the arc

 

This is what best modules, rated at 90% or better look like

 

The top 90% 2007 modules compared to my best honda insight prius module a 2004 module, pretty interesting, goes back to the different curve I said I was seeing on these 2007 (i called them 2008 previously) modules

That higher curve from the 2004 module is going to provide more power (pressure) to the motor. The FLATTER curve of the 2004 is more in line with what I am used to seeing from nimh in general. It's possible that an anti corrosion additive or other process may have been added in later years, that affected the discharge curve, who knows. It's also possible that they reinvented the power curve to better allow VOLTAGE to be used in a supervisory mode by the BMS, more curve means more information as to SOC for the computer to work with

 

You were too fast, I edited it and added two possible reasons, either of which may be good, maybe lol

 

Yes, but I would recondition all of them, charge them up, drain them down, make sure they are all kind of the same, i am working one right now that threw a code, but otherwise worked, and was a timebomb to leave you on the side of the road. i have the pack out draining testing, no need to recondition as it was just done in june, and will be back on the road in the morning.

I cant recommend a unit to buy, I am not up on them, but you need one that can charge and drain at 6.5 amps, preferably. But 3 amps will work, twice the time do to it all.

And my internet starts double posting, anyhow, the one i am working is a good example, neither voltage or a resistance test showed it was bad, I had to use techstream in the car to find the suspect, which narrowed it to 2 modules, then pull and test, and i found it

Which physical modules are Battery Block Vol - V01 ? | PriusChat