USPTO Patent Granted for Power Supply Apparatus

ChangeBridge: Patent Grants - Power Supply (H02J)

Published March 24th, 2026

Detected March 25th, 2026

Summary

The United States Patent and Trademark Office (USPTO) has granted patent US12587029B2 for a power supply apparatus developed by DENSO CORPORATION. The patent describes a system with multiple power supply circuits that cooperatively power a load, featuring independent ground lines and ground current detectors to diagnose and manage abnormalities.

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What changed

The USPTO has issued patent US12587029B2 for a novel power supply apparatus. The patent, assigned to DENSO CORPORATION, details a system comprising multiple power supply circuits designed to work together to power a load. Key features include independently configured ground lines for each system, ground current detectors, and control units with ground line diagnosis capabilities to identify and respond to abnormalities by altering the operation of affected systems.

This patent grant signifies a new technological development in power supply systems, particularly relevant for manufacturers in the automotive or electronics sectors. While this is a patent grant and not a regulatory rule, it may inform future product development and industry standards. Compliance officers should note this as a development in intellectual property for power management technologies, potentially impacting product design and manufacturing processes.

Source document (simplified)

← USPTO Patent Grants

Power supply apparatus

Grant US12587029B2 Kind: B2 Mar 24, 2026

Assignee

DENSO CORPORATION

Inventors

Hirokazu Kawasaki, Hideki Kabune

Abstract

A plurality of systems of power supply circuits are provided between a power source and a load and are capable of cooperatively supplying power to the load using power of the power sources. In the power supply circuits, ground lines connected to a negative pole of the power source are configured independently for each system. A plurality of ground current detectors detect ground currents that are currents flowing through the ground lines of each system. The control units have ground line diagnosis portions that diagnose an abnormality in the ground lines based on the ground currents. When the ground line diagnosis portions determine that at least one system ground line is abnormal, the control units change the operation of the power supply circuit of the system determined to be abnormal.