Batteriesystem und Verfahren zur Diagnose des Zustands eines Verbindungskondensators Gemäss dem Betrieb einer Vorladeschaltung

Details

Veröffentlichungs-Nr.

EP4803916

Anmeldetag

27. Juni 2025

Veröffentlichung

8. Januar 2026

Rechtsraum

EP

Abstract

The present disclosure relates to a battery system and a diagnose method of a link capacitor according to an operation of a pre-charge circuit, and a battery system according to the present disclosure includes a battery pack; two terminals connected to an external device including a link capacitor connected in parallel to the battery pack; a pre-charge circuit including a pre-charge resistor and a pre-charge relay connected in series between one terminal of the battery pack and one of two terminals; a main relay connected in parallel to the pre-charge circuit; and a battery management system (BMS) that measures the pack voltage of the battery pack and the link voltage between two terminals, controls the turn-on operations of the pre-charge relay and the main relay, calculates a reference power amount estimated to have been supplied to the pre-charge resistor during the driving time of the pre-charge circuit, calculates a target power amount supplied to the pre-charge resistor during the driving time of the pre-charge circuit, and diagnoses the state of the link capacitor as one of a plurality of fault states based on a comparison result of a target power amount and a threshold power amount according to the reference power amount and a comparison result of the pack voltage and the link voltage.

Anmelder

Firma

LG Energy Solution, Ltd.

Land

🇰🇷 Südkorea