No I don't

 

Hey Steve don't me to interupt you is just one thing I don't understand

When the battery reaches 66v and I measure the 11 tap voltage do I disconnect the decharger or leave the discharger until the battery is fully out of power then do the 10 hour rest?

 

You follow the steps I gave you.

From post #26:

Continue discharge to 66V. Measure and record the 11 tap voltages.

Remember, 25W discharges will take hours. Allow 24 hours for the whole discharging process.

Master switch off.
Disconnect discharger.
Wait 10 hours.
Measure and record all 11 tap voltages.

Note the next step after measuring the tap voltages is "master switch off". That terminates the discharge.

I'll cut you some slack since I didn't spell it out...

Steve

 

I have the results from the begin to the 66v discharge should I email u it now or after the 10 hour rest?

 

You have edit access of the sheet. Just populate it yourself.

 

results for now untill 10 hour finish


how does it look so far? good or not?

 

Check out the sheet. I added a chart and color codes. Please go to the second tab, Time & Volts and enter the times and volts I asked you to record in post #26. If it's too much data, just enter the values down to 145V. If you didn't record as I asked, please provide estimates of how long it took to get to 145V and how long it took to get to 132V. The amount of time it took to discharge to 145V will be key in determining how good or bad the subpacks of concern are.

The 145V column values are the most concerning. The ones under 12V are very concerning. Under 13.2V are also of some concern.

I've flagged the ones in the 105V & 66V columns as those subpacks are extremely strong, and they may turn out to be the ones of concern in subsequent tests.

What the data screams is that at least 7 of your subpacks are severely imbalanced and/or are suffering from severe voltage depression.

The four lowest subpacks in the 145V column are of significant concern and will need to be replaced if they don't show signs of recovery.

This deep discharge process effectively reconditions the weakest cells by eliminating voltage depression. If we are lucky, the weakest sticks will recover to a level that the pack will function normally.

If it has been more than 4 hours, please update the sheet to indicate how many hours and record all the resting voltages
voltages.

We may be pressed for time, and I want you to have your answers this weekend.

 

Please double check your entries. The sum of voltages you entered for 145V only total 133.8. If you missed the target voltage, please update the sheet heading with the pack voltage at which the tap voltages were recorded.

 

Proceed as follows:

1. Replace/secure IMA cover.
2. Grid charge until the pack reads 159V. Continue grid charge for 30 min.
3. Disconnect grid charger.
4. Disconnect 12V negative battery cable for 15 seconds.
5. Reconnect 12V negative battery cable.
6. Start car.
7. Allow to charge at idle until the charging stops. It will likely terminate at 3 bars. DO NOT REV THE ENGINE OR DRIVE IT.
8. Turn off car.
9. Repeat steps 4 through 8 until you have accumulated 20 minutes of idle charge time. This should take 3-5 12V disconnects, and your final charge should terminate very quickly with the SoC meter going to full.
10. Turn off car.
11. Wait 30 minutes
12. Record tap voltages in sheet.

Repeat 100W discharge instructions to 145V recording main voltage at the same intervals (30 sec, etc.)

Once 145V is attained, record tap voltages and then terminate discharge.

Record data in sheet.

 

Some things have transpired off-forum.

The second discharge to 145V went way faster than it should have.

Proceed as follows:

1. Grid charge for 24 hours.
2. Record tap voltages immediately before terminating grid charge.
3. Repeat discharge to 145V and record pack time/volts data as before.
4. Record tap voltages at 145V
5. Terminate discharge.
6. Grid charge overnight.
7. Use car as you need until next weekend.