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Hey bokaj25, We may need more information than that. Is is an i-MiEV or something else. What year is your vehicle. I haven't looked at the pinouts of every year model. Attached to this message is the schematic for the 2012 i-MiEV. connector c-107 is the connector on the BMU under the back seat...

So, trying to understand this..... 0x346 2B 37 51 30 00 00 04 56 Byte 3 = 0x30 or 0011 000 in binary So , you are saying count bits from right to left? This says ready with turtle based on my interpretation. Most of the time byte 3 is equal to 0x20 being just the ready bit on. When i start...

Thanks Blinks I did the same and agree that seemed to fix the issue. Been driving 3 days now with no glitches. Oh, I also confirmed that The ECU turns on switched power to the BMU during charging

Remove PIN 6 & 7 from BMU Connect CAN0 of DUE to BMU Terminate 120ohms BMU CAN_H |--6-----------------| CAN0_H DUE CAN1_H |-----------ECU BMU CAN_L --7-----------------|CAN0_L DUE CAN1_L |----------ECU...

Hey Blinks, yes I’m afraid it’s still a work in progress. If you leave the device powered it gets lost and has to be reset. I am working on a modification to connect to switched power and see if the issue goes away as Mickey says. But long term I want to use interrupt routines instead of...

I think the better way to keep up with degradation would be to monitor charging. Once a month drive to empty and then charge to full and count AH in to adjust the capacity. With experience it may be able to be done on any charge cycle. At this point I don’t think it matters because we are...

If I make the SoC static the car keeps driving. The cars have always went into turtle at 10% SoC and the display goes to ---. It will let you drive in turtle mode for 10% more, so if you had a range of 65 miles it will let you drive in turtle for 6.5 more miles. Somehow this equation is...

Hey David, After my latest test drive I am wondering why we cut off the SoC volts table at 3.54912? If volts = 3.053819 then SoC = 0 is this where NMC chemistry = 0? I thought it went to 2.75V. In addition the car stops at 10% SoC. So with the equation SoC = 12.096*volts -36.939, when volts...

I loaded version 6 of my CAN bridge software with the corrections made by David. Thanks I took a drive and looks like it is working beautifully. I don't understand their range estimator (most people refer to as GOM). It jumps from 178Km to 64km after I have been sitting in the garage for 10...

Looks like that was just numbers transposed. it said: else if (volts < 3.77376) { SoCv = 138.703950288505 * volts - 495.33954727031;return;

Internal Resistance is reported by the BMU on request from test equipment. When the command 761 2 21 1 0 0 0 0 0 is sent the BMU responds with 762 10 2E 61 1 5B 6D 1 71 762 21 1 1 5F 33 0D 8C 45 762 22 2 44 0...

I had the thought of using the weakest cell first. I didn’t use it because I thought pack voltage would vary less and be a more stable judge. I never tried it. Just driving the car I can’t tell any difference. As you pointed out in your data analysis it does seem to change the rate that SOC drops.

Thanks Frud and David. I loaded Fruds code and took a drive. Here is the data.

Hey Frud, I didn't write that part David wrote it. I think it is code from OBDZero. I originally used something similar with total voltage but specified a range rather than his method of less than. I believe that using total voltage rather than average cell voltage jumped around more. For...

// Arduino Due - Displays all traffic found on either canbus port // By Thibaut Viard/Wilfredo Molina/Collin Kidder 2013-2014 // Modified by Paul Dove/ David Cecil to make a CAN bridge between ECU and BMU in 2012 Mitsubishi i-MiEV // Reads all traffic on CAN0 and forwards it to CAN1 (and in the...

That’s an interesting idea Frud, I incorporated coulomb counting with voltage used as a a remaining amp hour indicator. It seems to work very well. I still need to do some testing but I’m very pleased with the results.

Yes, I believe you are correct. I am not finished characterizing the behavior. Yesterday, driving home the vehicle suddenly stopped. I sent you the data. Not sure why yet, I got no turtle I just lost all power and ready went off. it wouldn't start back up either. I plugged in my laptop and...

Welcome sheet, Yes, I live in the Us and upgraded my own pack. Not too hard if you’re mechanically inclined. Currently getting over a hundred miles range. I’m still working on the range estimation SOC calculation in the software but the way the car works is simple and straightforward. Here is...

Ok, update. I wrote some code to calculate my own SOC. I was able to drive over 100 miles. My algorithm was not too good so it said I was empty around 3.5 volts. So, that means I should be able to go a good bit more before empty. It is funny how simple their software is..... All you need to do...

Sorry, you are correct but it doesn't change often. in my case it shouldn't matter for experimentation since I'm just multiplying it by 2. Based on my experiments the ECU is calculating Rest Range based on [0] and [6]. [1] seems to drive the display if my memory is correct. I wrote some quick...