An Energy Management Unit (EMU) integrates the on-board charger (OBC) and battery management system (BMS) and optional DC-DC to behave like a lab based Electrochemical Impedance Spectroscopy (EIS) device. New high-bandwidth charge control schemes, together with new high-voltage system architecture, are disclosed. During vehicle AC charging, the OBC outputs current that sweeps across various frequencies (typically 0.1 Hz to 10 kHz), while the BMS samples the voltage and current to create the Nyquist Plot (Real Vs Imaginary Impedance) of battery cell parameters, without high frequency cell voltage samples (which is not cost feasible for mobility and energy storage applications).
TECHNIQUE USING A BATTERY CHARGER AND BATTERY MANAGEMENT SYSTEM TO DETECT CELL DEGRADATION AND PACK IMMINENT FAILURES
VERFAHREN MIT EINEM BATTERIELADEGERÄT UND BATTERIEVERWALTUNGSSYSTEM ZUR ERKENNUNG VON ZELLABBAU UND ZUM VERPACKEN DROHENDER FEHLER
TECHNIQUE UTILISANT UN CHARGEUR DE BATTERIE ET UN SYSTÈME DE GESTION DE BATTERIE POUR DÉTECTER UNE DÉGRADATION D'ÉLÉMENT ET DES DÉFAILLANCES IMMINENTES DE BLOC
2024-11-06
Patent
Electronic Resource
English
IPC: | G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung |
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