Patent · US Active

Method for analyzing the condition of a traction battery, and motor vehicle

US12415424B2 · kind B2 · utility

0Cited by

1References

9Claims

0Family size

Assignee

VOLKSWAGEN AKTIENGESELLSCHAFT · DE

Inventors

Ralf Pfennigwerth · Lehre, DE
Christian Wick · Meitingen, DE
Gerd Stoehr · Wesendorf, DE

Key dates

Filing date	Jun 9, 2023
Grant date	Sep 16, 2025
Priority date	—
Expiry date	Jan 3, 2044

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB60L2240/545
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

A motor vehicle and method for analyzing the condition of a traction battery of a motor vehicle, wherein the motor vehicle includes an electric or hybrid propulsion system with an electric motor for driving the motor vehicle, power electronics for driving the electric motor, a battery management system with a monitoring device for monitoring the traction battery, and the traction battery. Impedance spectroscopy is performed on the traction battery with an alternating current across multiple alternating current frequencies. At least one battery parameter of the traction battery is determined based on the impedance spectroscopy performed. In the context of impedance spectroscopy, the traction battery is supplied with alternating current at several alternating current frequencies by the power electronics.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.