Regenerative Braking
WARNING: This page is about a different car, the 2012 GMC Yukon, 2012 Chevrolet Tahoe, and 2012 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
When the vehicle is coasting or braking the hybrid powertrain control module may operate the drive motor generators in an electrical generation mode. Operating as electrical generators, the drive motor generators exert a driveline load that helps to slow the vehicle. The electrical energy that the drive motor generators create is transferred by the drive motor generator power inverter module to the drive motor generator battery assembly (hybrid batteries). Constant communication between the hybrid powertrain control module and the electronic brake control module (EBCM) allows the blending of regenerative braking force with hydraulic braking force.