The early versions of the Evie had a BMS that can best be described as a battery killer. This version had to have each cell voltage adjusted individually by using a set of multiturn Pots , by all accounts they were a terror to set up. They drift. And as a result you can get the car shutting down, because the BMS believes a cell has gone low voltage. This part of the system didnt do the active balancing, which was a separate board, with a second cable set. This also had to be manually setup. I have seen a number of these cars having both cut out problems and batteries that are being bled down by the BMS.
Since I now have the spare cable sets , and also new BMS units, I have now worked out a mod to take out the original BMS , add the new one into the spare wheel well, (As per later cars) put in new BMS / Cell cables and re wire a lot of the Curtis controller inputs and outputs. Once this is all done the software in the Curtis controller has to be changed, and I have now modified a version to work with this set up. Hey presto, the cars now have the later BMS, and drive much better with less pack destruction.
The first one took 6 weeks lots of sleepless nights and grey hair to sort out the software issues, but I can now convert a car in about three days. This gives a new lease of life to the early cars, and also allws me to download the BMS data for any future diagnostics.
Dedicated to the conversion sold by the now defunct Electric Car Company
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