Charge Cart Unit (CCU)
Updated the previous year's Charge Cart Unit. The cart stores, moves and charges the 588V accumulator, and this board bypasses the safety circuitry on the BMU so the pack can charge outside the car. I added a UART to USB-C circuit on the board, so any laptop can plug straight in and monitor voltages, temperatures and balancing status of all 140 series cell groups without an external adapter.
The Board
Bringup and Validation
The UART to USB-C circuit was verified on the bench, and the rest was tested on the charge cart.
