Toyota Electric Power System Patent Application

ChangeBridge: Patent Apps - Power Supply (H02J)

Published May 23rd, 2025

Detected March 26th, 2026

Summary

The USPTO has published a patent application from Toyota Jidosha Kabushiki Kaisha for an electric power system. The application details a system with multiple power storage devices, relays, inverters, and a changeover switch designed for electric vehicles. The filing date was May 23, 2025.

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What changed

The United States Patent and Trademark Office (USPTO) has published patent application US20260088644A1, filed by Toyota Jidosha Kabushiki Kaisha on May 23, 2025. The application describes an electric power system intended for vehicles, featuring a dual power storage device configuration with series and parallel relays, inverters, and a changeover switch. The system aims to manage power flow efficiently, particularly for electric vehicle applications.

This publication represents a new patent application and does not impose any immediate compliance obligations. However, it signifies ongoing innovation in electric vehicle technology by a major automotive manufacturer. Companies operating in the automotive and electric vehicle sectors, particularly those involved in power systems and battery management, may wish to review this application for competitive intelligence and potential intellectual property considerations.

Source document (simplified)

← USPTO Patent Applications

ELECTRIC POWER SYSTEM

Application US20260088644A1 Kind: A1 Mar 26, 2026

Assignee

TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventors

Hiroaki TOYODA, Hiroshi Morita, Kazuma Fujiwara

Abstract

The electric power system includes a first power storage device, a second power storage device where a second negative terminal is connected to the negative-side line, a series relay provided in a series line connecting the first negative terminal of the first power storage device and the second positive terminal of the second power storage device, a power storage system having a parallel relay provided in a parallel line connecting the first negative terminal and the negative-side line, a motor, first and second inverter units, and a changeover switch provided between the first and second inverter units of the positive-side line. The first inverter unit includes a three-level inverter having a first upper arm and a second lower arm of a third phase, and an intermediate potential switch of first, second capacitor, and three phases. The second positive terminal is connected to connection points of the first and second capacitors.