Hello. I am very new to hardware development and am in need of some professional help determining what parts I need to accomplish my goal. I am looking to build a power management system for use inside a car. The system will be used to manage power to a Raspberry Pi. Attached is an accurate (yet I'm sure very crude...please pardon my ignorance) representation of what I'm trying to accomplish. The goal of this is to maintain a constant stream of clean power to the RasPi while the vehicle is in operation. Could I get some guidance on what materials I need in order to make this a success?