Rivian is continuing to iterate on its Rivian Adventure Network (RAN) hardware, and two recently published patents reveal some incredibly clever engineering happening behind the scenes. From surviving extreme weather to creating a more aesthetically pleasing charging experience, these documents show that Rivian is rethinking both the hardware efficiency and the user experience of public charging.
Self-Heating Chargers without the Heaters
The first patent, titled "Systems and Methods for Heating an Electric Charger for Electric Vehicle" (US12592646 B2), addresses the harsh realities of outdoor infrastructure. Chargers placed in extreme environments face freezing temperatures and high humidity, which can easily lead to damaging internal condensation and component failure.
Instead of adding bulky, expensive, and inefficient dedicated heating elements to the cabinets, Rivian engineers have developed a way to use the existing internal hardware to keep things warm. The power cabinets utilize Dual Active Bridge (DAB) DC-DC converters to manage the flow of electricity to your vehicle.
When internal sensors detect that the ambient temperature has dropped below a specific threshold, such as -20 degrees Celsius, or if relative humidity rises above 90 percent, the system can automatically trigger a dedicated heat generation mode.
In this mode, the control circuitry intentionally operates the converters inefficiently to create controlled electrical losses. By creating a shorted output on the secondary side bridge, or by circulating current between bidirectional converters while the system is in a no-load state, the hardware generates heat.
These electrical losses naturally radiate thermal energy, warming the inside of the cabinet and driving out moisture. Once the environmental conditions return to safe operational levels, the system exits the heat generation mode and resumes standard functionality.
Synchronized Charging
The second patent, titled "Synchronized Lighting for Electric Vehicles" (US12583382 B2), focuses purely on the visual experience of a busy charging hub. The patent text notes that when multiple electric vehicles are plugged in at a single location, their independent charging status lights naturally blink at different intervals. Rivian describes this uncoordinated flashing as a problematic and chaotic "cacophony of light".
Rivian's clever solution is to synchronize the entire charging station into a harmonious visual display. To ensure perfect timing, the system utilizes a universal wireless time signal, such as a standard GPS broadcast, to establish a shared, highly accurate clock between the charging dispensers and all the plugged-in vehicles.
Once a vehicle is plugged in, the charging station control system transmits a specific charge status light pattern to the vehicle. This data can be transferred via WiFi, Bluetooth, or directly through the control pilot signal line inside the charging cable itself. This pattern dictates the exact rhythm, cadence, and brightness intensity of the light pulses over a set sequence of time steps.
Because every dispenser and vehicle at the location is operating on the exact same GPS time signature and following the same pattern data, the front light bars, rear light bars, charging port lights, and dispenser indicators can all pulse, sweep, and breathe in perfect unison.
