A few days ago, I explained how me checking the current draw through a multimeter screwed things up.
Before that was done, my 12V battery had been disconnected for about a week.
So the HV battery showed 0 miles and 0 kw ETE. I knew this to be completely wrong as I remember the HV battery had about 50 miles range and voltages of the individual cells were at 3.65 volts approximately.
The fix appeared to be to just reset the HV battery state of charge correction using forscan. Doing that the range changed to 30 miles. And the individual cell voltages did not seem to change.
The vehicle drove fine, but something did not seem right, the range did not seem right for the "fixed" ETE.
I checked the cell voltage again, and discovered #42 was about 0.11 volts lower than the maximum. It seemed to be only cell with a large variance, all other cells varied by 0.01 volts.
I did a full 240V charge and while the Forscan said that balancing was in progress. No balancing happened. The ETE was 23 kw.
The range said 105, which for 23kw would be fairly difficult to do, but I thought that because I was doing a slow drive through the neighborhood a day before, it might be reflecting that .
I asked about the voltage/charge state to trigger a rebalance in the forum, and if a map exists where to find a particular cell.
Wednesday, I drove the car around to get the SOC less than 80%, thinking this was necessary to initiate a rebalance.
Thursday, Friday, and today, I monitored a full charge up with forscan.
I found that the current being supplied by the SOBDM on board charger was 17.7 amps, yet the power meter outside said I was consuming 7.1 kw. And I found that though it said that rebalance was in progress, the #42 cell voltage did not increase, The ETE went to 24.252 kw. and the pack SOC stopped at 95%, while the displayed SOC was 99.5%. Range was now 112 miles.
For over 24 hours, the battery was supposedly rebalancing, yet voltages did not change, there was a current draw of 0.1 amps, and no values: SOC, #42 cell voltage, high/low cell difference, ETE, changed. It seemed that the current drawn was to just run the coolant pump during charging.
18 months ago, I provided another member my As Built Data for the BECM, as they wanted to reconfigure a 23 kw car with a 33.5 kw battery. Today I did a check of the As Built Data for the BECM. Something is very wrong here:
See next post.
Before that was done, my 12V battery had been disconnected for about a week.
So the HV battery showed 0 miles and 0 kw ETE. I knew this to be completely wrong as I remember the HV battery had about 50 miles range and voltages of the individual cells were at 3.65 volts approximately.
The fix appeared to be to just reset the HV battery state of charge correction using forscan. Doing that the range changed to 30 miles. And the individual cell voltages did not seem to change.
The vehicle drove fine, but something did not seem right, the range did not seem right for the "fixed" ETE.
I checked the cell voltage again, and discovered #42 was about 0.11 volts lower than the maximum. It seemed to be only cell with a large variance, all other cells varied by 0.01 volts.
I did a full 240V charge and while the Forscan said that balancing was in progress. No balancing happened. The ETE was 23 kw.
The range said 105, which for 23kw would be fairly difficult to do, but I thought that because I was doing a slow drive through the neighborhood a day before, it might be reflecting that .
I asked about the voltage/charge state to trigger a rebalance in the forum, and if a map exists where to find a particular cell.
Wednesday, I drove the car around to get the SOC less than 80%, thinking this was necessary to initiate a rebalance.
Thursday, Friday, and today, I monitored a full charge up with forscan.
I found that the current being supplied by the SOBDM on board charger was 17.7 amps, yet the power meter outside said I was consuming 7.1 kw. And I found that though it said that rebalance was in progress, the #42 cell voltage did not increase, The ETE went to 24.252 kw. and the pack SOC stopped at 95%, while the displayed SOC was 99.5%. Range was now 112 miles.
For over 24 hours, the battery was supposedly rebalancing, yet voltages did not change, there was a current draw of 0.1 amps, and no values: SOC, #42 cell voltage, high/low cell difference, ETE, changed. It seemed that the current drawn was to just run the coolant pump during charging.
18 months ago, I provided another member my As Built Data for the BECM, as they wanted to reconfigure a 23 kw car with a 33.5 kw battery. Today I did a check of the As Built Data for the BECM. Something is very wrong here:
See next post.
