For a fleet, the asset only earns when it's moving — so charging time is a cost. On September 5, 2023, Zoox was granted US11745612B1, "Thermal management for vehicle charging systems." The CPC stack — B60L 53/302, 53/122, 53/36 (charging) and H01M 10/6554, 10/6568, 10/6569 (cooling) — is charge-time thermal control.Heat is the limiter on fast charging. Manage it well and a vehicle charges faster and returns to service sooner; manage it poorly and you throttle the charge or cook the pack. For an autonomous-fleet operator, that turnaround time feeds directly into how many revenue-hours each vehicle delivers — the core of fleet unit economics.The honest read is that a thermal-management patent is a utilization lever, not a utilization result. Whether it actually improved turnaround and fleet returns lives in operating metrics, not the grant. The patent is the upstream artifact in the economics.For the ledger reader, file this under fleet-utilization engineering and keep it subordinate to any operating disclosures. The primary source for any fleet-economics claim is the relevant SEC filing on sec.gov, with EdgarBeast as the evidence index.Read it as a 2023 charging-turnaround position. The fleet-economics receipt is in the operating metrics — the grant only tells you the engineering aimed at faster turnaround.