Phev Insight

[uhtrinity]

What were your pack voltages at when it dropped from 3 to 0 bars? Mine is always around ~140 volts, but then again I only have 25% of your capacity.

Welcome to the 3 bar club

[retepsnikrep]

Well above that, more than 150V sometimes. It's not just checking the voltage i'm sure it perhaps has some sort of timer/counter as well.

So if it doesn't see a low voltage dip after X ah at 3 bars or x minutes of assist it drops anyway Fail safe in case of glitches?

I do have another BCM so I might try that to see if there is any difference between them.

I note your comments about the current matching with the two sensors, you say it worked though so long as assist was not 100% for more than 15 secs, is that right. Or have I read that wrong.

That's not to bad to be fair. I could add a timer so that after 10 secs at 100%, which is 2.5C and quite hard on my cells, it drops to 50-75% automatically avoiding that issue perhaps?

[retepsnikrep]

Originally Posted by uhtrinity

Welcome to the 3 bar club

I'm not sure I want to be a member of this The 20 bar club maybe

Edit

I tried the 10R resistor battery soc sensor mod, no joy sadly. As soon as any current flows you get a P1586 Motor module and battery module current problem. The missmatch is being detected Back to the drawing board.

I'm moving stuff about in the back of my car, I aim to put the charger down the side of ipu comp, bcm & mcm behind seats and relocate batteries if possible into the ipu comp. I want my spare wheel well and luggage cuby hole back

[retepsnikrep]

What about faking the serial signals from the bcm?

If we took a snapshot using a digital scope of burst of signals being sent when battery is at full soc and in fine fettle. A pic/axe programmed to output the same serial signals inserted into the cuircuit could just send out the "yes we are OK and fully charged" all the time. We don't even really need to know what the signals mean if we could replicate them. I don't have a sampling scope but perhaps could capture them using my pc scope. Hmm.

Of course this renders the bcm redundant. Is it two way comms from bcm to the other units or one way? I'll have a look at the schematic.

[Mike Dabrowski 2000]

The BCM signal called QBAT is probably what you would need to fake. I have not looked at it since the first MIMA experiments, but seem to remember that it was not a simple serial comm?

[uhtrinity]

Originally Posted by retepsnikrep

I note your comments about the current matching with the two sensors, you say it worked though so long as assist was not 100% for more than 15 secs, is that right. Or have I read that wrong.

That is what happened to me in my early tests, and I haven't rechecked it to verify. It also had the effect of halving the current seen by mima which was my idea at the time.

[retepsnikrep]

Hmm I see when the ratio was 2 - 1 it worked for you but when I tried 10 - 1 it didn't

[uhtrinity]

Originally Posted by retepsnikrep

Hmm I see when the ratio was 2 - 1 it worked for you but when I tried 10 - 1 it didn't

I would think the farther off it is the quicker it will throw a code.

[retepsnikrep]

Just a PHEV update. I've been runing about for about two months now, and since weather has finally taken a turn for the better temp wise in the last few days, I'm now doing over 125mpg (UK) on my daily commute. We are now up to a balmy 10C at the moment.

13 miles each way to work with a cold engine start each end.

I expect on a decent A road journey (100miles or so) in good conditions now I'll be getting close to the max 150 mpg display can show.

Batteries seem to be holding up well. I've been helping a lot of other UK Insight owners recently so have got a bit stuck finishing my BMS. In fact I'm swapping out a dying battery tomorow for someone.

Will I be the first ever to see a lmpg figure of 100mpg by end of this year?

[Roger Crier]

After all your efforts, you certainly deserve to hit the ton.