The board is based on the Cypress CCG2 USB PD negotiator and the TI BQ40z60RHB. The BQ40z60RHB includes both charger control logic and charge balancer capabilities for 2-4 cell batteries. (It also can do single cell, though it is over kill.) The CCG2 will allow up to 100W of power and the BQ40z60RHB through the on board charging transistors will utilize that for charging.
We will be using XT-30 connectors for battery and system connections and a JST-XH cell balancer connector.
The CCG2 will be in multi master master slave i2c mode to help monitor charging and run LED status indicators with or without a host microcontroller connection by i2c.
I plan to re-lay the board so that it will easily mount on drones or other electronics to provide charging.
The board needs some significant tweaks and firmware, but should be functional soon.