When a sports-car maker patents distribution-grid load management, the EV-charging problem has clearly outgrown the car. US11919417B2, granted to Porsche on March 5, 2024, claims a load-management system for managing loads in a power-distribution grid — and the emphasis is on the grid, not the vehicle.
The CPC tags straddle both worlds. The B60L 53/xx series is all EV charging (53/68 load management, 53/63 schedule-based charging, 53/51 charging from renewable), but H02J 3/322 (use of batteries in distribution networks) and H02J 7/35 (PV charging) pull it onto the grid side. The patent is about coordinating charging loads so they fit within the feeder's limits.
Here is the feeder-protection mapping. A neighborhood transformer was sized for homes, not for several EVs fast-charging simultaneously. Uncoordinated charging can overload it. Load management staggers and throttles charging — based on schedule, on renewable availability, on grid conditions — so the aggregate load stays within bounds. That is grid protection achieved through the car.
The patent fences a load-management method, not EV charging and not the grid hardware. Many coordination schemes exist (utility signals, time-of-use pricing, local controllers); Porsche claims its approach. Reading it as "Porsche owns managed charging" would miss that this is one method among many.
From patent to grid, the significant fact is the filer. Automakers patenting grid-side load management means the industry recognizes that mass EV adoption is constrained by distribution-feeder capacity, not just by chargers. The car company is fencing IP on the constraint — a sign that the EV transition's binding bottleneck is increasingly the grid, and everyone, including the automakers, is racing to own pieces of the solution.