siai47 wrote:What does the CANION report when the vehicle reaches full charge before you drive it? What is the difference between the lowest and highest cell voltage? Drive the car with the CANION active and watch the cell voltages. Accelerate with full power and see if one cell drops dramatically vs. the others. One cell hitting cutoff voltage will trigger the turtle. The fact that you don't have all of the "bars" on your battery gauge suggests that you have a really out of balance pack that cannot be fully charged before some of the cells are exceeding the high voltage limit. When fully charged and balanced, all cells should be at or slightly exceed 4.105 volts. If you note one lower (.2 volts means you are seeing one or more under 4 volts) note the cell number(S) and see if they go very low when you drive. BTW--you are charging until the vehicle shuts down the EVSE---even if it seems to be taking several additional hours?
Some answers for yesterdays events: The i909 MUT-clone was indicating pack at ~360 before i drove it. The delta V was about 0.2. When driving the cell 47 would rise up nearly to the other cell level under regen, and dropped dramatically under acceleration--i couldn't read the values while driving, but will try to get a helper to read the screen. i had plugged in the EVSE and let it run until it shut off.
Now this morning i pulled trouble codes using the i909 and found DTC P1A44 set in both the EV-ECU and BMU. Made a reading of the stream data for CMU07, module voltage at 32.02 and all cells were at 4.02 except cell C (#47) at 3.87. Other data indicated the board was Normal (Monitor IC, Voltage Sensor, Reference Voltages, CAN, ADC ref voltage, etc.). Compared data with CMU08, module at 32.21 and all cells A thru H were at 4.02.
So i cleared the DTC, and then read the TPMS data stream just for fun (expensive tire gauge), 42 41.40 42.80 42 0 were tire 1-5 pressures, warning threshold at 28.6 psi and release warning at 30.8 psi.
The key must be at ON in order to get readings even though the i909 powers up just plugging into OBDII.
So i plugged in the EVSE with i909 and key ON, and no charging occurred (no relays or water pump, etc). i read the BMU data and found Target Cell Voltage was 3.87, Battery Max Power Output 63.5 kW, Max Input Power 29.25 kW, Pack Voltage at 354 VDC.
Key OFF and plugged in EVSE again, this time charging started. Read the EVCU datastream: DC/DC f/b ON; charge contactor OFF; Main contactors (+/-) ON; charging permission ON; charging start OFF; Made a voltmeter check of aux battery at 14.35.
Read the BMU datastream: Battery Current 7A; Balancer Drives: CMU07 all ON except cell C OFF, CMU08 all ON; after several minutes of charging the BMU Target Cell Voltage was up to 3.94.
So the balancing drives appear to be ON for all cells except #47. Will see how it goes--maybe the cell will be okay.
Concerning the DTC P1A44, BMU Leakage Detection, when i cleared it with the i909 then the warning lights on the dash turned off. i wonder if i induced that fault by trying to externally charge the aux battery while the EVSE was plugged in yesterday?
Amazon has the i909 for $114, it is a nice tool to have in a situation such as this...It has a few features that could be updated and is missing some of the possible CMU data fields, and i intend to ask if they will make these changes in an update thru the USB port.