Hyundai Patents EV Battery Diagnosis System

ChangeBridge: Patent Apps - Batteries (H01M)

Detected March 26th, 2026

Summary

Hyundai Motor Company has patented a new system and method for diagnosing and evaluating the state of electric vehicle batteries. The patent describes a system that uses a diagnostic device to obtain vehicle data and a charging/discharging system to facilitate simultaneous charging and discharging between two EVs for diagnostic purposes.

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What changed

Hyundai Motor Company has been granted a patent (US20260084571A1) for an electric vehicle (EV) battery diagnosis system. The patented technology involves a method and system that utilizes a diagnostic device to collect vehicle data from a target EV (EV1) and a charging/discharging system that allows for simultaneous charging and discharging between EV1 and a center vehicle (EV2). This setup aims to diagnose and evaluate the battery's state by analyzing the exchanged energy data.

This patent represents a new technological development in EV battery management. While it does not impose immediate regulatory obligations, it signals potential future industry standards or requirements related to EV battery health monitoring and diagnostics. Companies involved in EV manufacturing or battery technology may wish to review this patent for competitive intelligence and to anticipate potential shifts in diagnostic protocols or equipment.

Source document (simplified)

← USPTO Patent Applications

SYSTEM AND METHOD FOR DIAGNOSING AND EVALUATING A STATE OF A BATTERY

Application US20260084571A1 Kind: A1 Mar 26, 2026

Assignee

HYUNDAI MOTOR COMPANY

Inventors

Yo Han Baek, Bo Hyun Lee

Abstract

A method and system for diagnosing and evaluating a state of battery. The system for diagnosing and evaluating a state of an electric vehicle battery includes: a charging/discharging system that provides a direct high-voltage path for simultaneous charging and discharging between a diagnosis target vehicle (EV1) and a center vehicle (EV2), and a diagnostic device that obtains vehicle data corresponding to each of the charging and discharging from the EV1 through diagnostic communication and diagnoses and evaluates a state of a battery of the EV1 based on the vehicle data. In particular, energy discharged from a battery of the EV2 is charged to the battery of the EV1 through the charging/discharging system after energy discharged from the battery of the EV1 is charged to the battery of the EV2 through the charging/discharging system.