I am working on a project looking at adding charging to a very small AUV. We are in the lab test phase of the project and are planning to use a Maxon BLDC motor operating in both motor and generation direction. When generating the motor will be producing a maximum of about 10V and charging a battery. When running as a motor power will need to come from the battery.
I am looking for a device to increase the 10V from the motor to high enough to charge a 12V battery. The device needs to be bi-directional in order to take power from the battery to run the motor in the motoring direction.
After the lab testing phase, I would like to also find a solution that can drive the motor and charge and discharge a battery.