Chicago & Detroit
Problem as I see it is those batteries are dangerous with out accurate monitoring/BMS. An off-the-shelf one can probably be bought that would make the system less than $1000.
That's still a good deal... half the price of an OEM Honda NiMH refurb, and also cheaper than a 3rd party NiMH cell swap. Were you able to work with someone here to potentially ship them via a cheaper method? As I mentioned previously, you can break the large box down and ship the two smaller boxes (which are properly labelled for individual shipping).I have bought four sets but they will work out at about $1500 each by the time I get them to the UK and duty is paid.
Of course.. Lets keep it all on here in a special thread.Peter, are you interested in collaborating on the BMS replacement PCB I mentioned previously? Basically I'd be looking for your knowledge on the BCM fooler data stream... I've researched it some, but I discarded that subsystem once I knew for certain Linsight didn't need it at all. If I develop the BMS PCB - with an onboard microcontroller that can send data onto BATTSCI - can you help me with the serial data stream you're using with BCM fooler? I don't want to have to reinvent the wheel.
That's actually more effort than it sounds... I plan on using the 328p, which only has two hardware serial ports. I'll bit-bang a third serial port if I have to, but I'd rather not waste the CPU time, since I plan to use that to rapidly query SPI battery voltage and make realtime decisions. 25 MHz only goes so far .Your cpu will also probably have to receive data from the MCM on the METSCI line.
+ 5/12V Power/Ground presumably? Or will each slave board have a regulator/separate pwr/gnd??-The master/slave board idea is good, too. The interconnect would be 2-wire isoSPI.
Very easy to implement this with the OBDIIC&C as well,-9600 baud H-line is easy... 328p has a dedicated serial hardware protocol.
The voltages/configurations in red will be too low IMHO for the IMA without boosting it at the VPIN and the Voltage taps.I think I'll go into this project with these configurations in mind:
QTY-12S QTY-18S Result Vnom Vmax
3 0 36S 133 150
1 2 48S 178 200
0 2 36S 133 150
After I've roughed it out, if I can make more configurations work for free (or little effort) I'll look into that. I agree 54S would be great, but I don't believe it will make the initial roadmap.