Peter
Each of the modules has a micro or asic, but the numbers are painted over.
I just put up a photo of the insides of both the Insight and Prius BCM modules.
http://99mpg.com/batterypacksexpose/thebatterycontroll/
I think it would be great to know what their code looked like, but have no idea of how to extract that from the controllers.
let us know if you have better luck.