hi i lecture a small group of students in a workshop and we are looking at developing this idea further. we have ordered a coloumb counter but i wonder if there's a way to route the battery through the pi to measure charge and discharge... the purpose is to allow the robot to decide when it needs to return to base.
also, we are considering how to deliver power to the cells - wireless charging is preferred as we see issues with aligning connections for a physical method. but can we deliver high enough wireless power to charge in a reasonable time? as we have a rover, and wireless induction works best at short distances, perhaps some sort of raised plinth to reduce the induction distance between loops when the rover drives over the base.
we are looking at switching methods to allow charge discharge but ideally we can preserve the power_on state of the RPi. If we can't achieve this then we will need to modify start_up parameters to ensure continuity of operation.
as a group we are researching methods of collaborative working and hopefully working with other groups remotely. if anyone is interesting in joining this project we will be setting up a github repository (any better suggestions?) for our work so we will publish links for anyone who wants to join.