Pyrozünderschaltung und Testverfahren

Details

Veröffentlichungs-Nr.

EP3882944

Aktenzeichen

EP20163833

Anmeldetag

18. März 2020

Veröffentlichung

22. Juni 2022

Erteilung

22. Juni 2022

Rechtsraum

EP

IPC

H01H39/00G01R31/327

Abstract

The present invention refers to a pyro igniter circuit (1), comprising: a shunt resistor (10) connected in series with a power line (35), an amplifier (20) comprising inputs (21, 22) electrically connected to terminals (11, 12) of the shunt resistor (10) and a pyro igniter disconnect element (30) electrically connected to an output (24) of the amplifier (20) and configured to cut the power line (35) based on an ignition control signal (54) received from the output (24) of the amplifier (20). Further, the pyro igniter circuit (1) comprises a coupling resistor (40) electrically interconnected between an input (21) of the amplifier (20) and a terminal (11) of the shunt resistor (10) and a supervisory circuit (50) electrically connected to a node (n1) interconnected between an input (21) of the amplifier (20) and the coupling resistor (40), configured to: transmit a test signal (52) to the node (n1), wherein the test signal (52) comprises a pulse duration time (Td) below an igniter activation pulse time (Ta) of the pyro igniter disconnect element (30) and/or the ignition control signal (54) in response to the transmitted test signal (52) comprises an amplitude (Vd, Id) below an igniter activation amplitude (Va, la) of the pyro igniter disconnect element (30); and receive a diagnostic response signal (54, 56, 58) in response to the transmitted test signal (52).

Anmelder

Firma

Samsung SDI Co., Ltd.

Land

🇰🇷 Südkorea

Fachgebiete