Verfahren, Steuergerät und Computerprogramm zur Lokalisierung eines Erdschlusses Innerhalb einer Batterieanordnung, Batterieanordnung und Computerlesbares Medium

Details

Veröffentlichungs-Nr.

EP4726424

Anmeldetag

9. Oktober 2024

Veröffentlichung

15. April 2026

Rechtsraum

EP

IPC

G01R31/52

Abstract

A method for localizing an earth-fault (EF) within a battery arrangement (20) is described. The battery arrangement (20) comprises a battery pack (22) having a first pole (30), a second pole (32), and at least two battery cells (34) electrically arranged in series between the first pole (30) and the second pole (32), and a first switch (24) electrically arranged between the first pole (30) and a first resistor (R12), with the first resistor (R12) electrically coupling the first switch (24) to a ground potential (38), and a second switch (26) electrically arranged between the second pole (32) and a second resistor (R22), with the second resistor (R22) electrically coupling the second switch (26) to the ground potential (38). The method comprises: electrically coupling the first pole (30) to the ground potential (38) by the first switch (24), while the second pole (32) is electrically decoupled from the ground potential (38) by the second switch (26); measuring a first voltage between the first switch (24) and the ground potential (38); determining a first voltage value (V1) depending on the measured first voltage, wherein the first voltage value (V1) is representative of the measured first voltage; electrically coupling the second pole (32) to the ground potential (38) by the second switch (26); electrically decoupling the first pole (30) from the ground potential (38) by the first switch (24); measuring a second voltage between the second switch (26) and the ground potential (38); determining a second voltage value (V2) depending on the measured second voltage wherein the second voltage value (V2) is representative of the measured second voltage; determining that an earth-fault (EF) is present at the first pole (30), when the first voltage value (V1) at least approaches zero and the second voltage value (V2) at least approximately corresponds to a given battery voltage of the battery pack (22); determining that an earth-fault (EF) is present at the second pole (32), when the second voltage value (V2) at least approaches zero and the first voltage value (V1) at least approximately corresponds to the battery voltage; and determining that an earth-fault (EF) is present between the first and second poles (30, 32), when the first voltage value (V1) and the second voltage value (V2) are well between zero and the battery voltage, wherein an exact location of the earth-fault (EF) between the first and second poles (30, 32) is determined depending on a ratio determined from the first voltage value (V1) and the second voltage value (V2).

Anmelder

Firma

ABB Schweiz AG

Land

🇨🇭 Schweiz

Fachgebiete