USPTO Patent Granted for Electric Vehicle Charging Apparatus

ChangeBridge: Patent Grants - Power Supply (H02J)

Published March 24th, 2026

Detected March 25th, 2026

Summary

The USPTO has granted a patent (US12583351B2) for an electric vehicle charging apparatus and a method for monitoring its temperature. The apparatus uses resistance measurements to estimate connector temperature and adjust charging current to prevent overheating.

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What changed

The United States Patent and Trademark Office (USPTO) has granted patent US12583351B2 for an electric vehicle charging apparatus and its monitoring method. The invention focuses on a method to monitor the temperature of an electric vehicle charging connector by measuring its resistance at different times. The apparatus includes a charging pile with a power meter and processor that detects charging current, calculates resistance values, estimates the connector's temperature, and compares it to an over-temperature threshold to potentially reduce charging current.

This patent grant signifies a new technological development in the electric vehicle charging space. While not a regulatory rule, it may influence future industry standards or product designs. Manufacturers of EV charging equipment should be aware of this patented technology, particularly concerning thermal management and safety features. No immediate compliance actions are required for regulated entities, as this is a patent grant, not a regulatory mandate.

Source document (simplified)

← USPTO Patent Grants

Method for monitoring an electric vehicle charging apparatus, and electric vehicle charging apparatus implementing the same

Grant US12583351B2 Kind: B2 Mar 24, 2026

Assignee

METAL INDUSTRIES RESEARCH AND DEVELOPMENT CENTRE

Inventors

Hsien-Ju Wu, Chun-Chieh Chiu, Tai-Chang Chen, Jinn-Feng Jiang, Chia-Lung Huang, Mei-Jung Chen

Abstract

A method for monitoring an electric vehicle charging apparatus is provided. A charging pile that includes a power meter and a processor is used to provide a charging current to an electric vehicle through a charging connector. The power meter detects the charging current to generate an initial current value and an initial power value that correspond to an initial charging time, and a present current value and a present power value that correspond to a present time, so that the processor calculates an initial resistance value and a present resistance value of the charging connector accordingly, and then calculates an estimated present temperature value of the charging connector based on the initial resistance value and the present resistance value. The estimated present temperature value is compared with an over-temperature threshold to determine whether to reduce the charging current.