US 11,851,013 B2
Method for operating an electrically drivable motor vehicle and a device therefor
Sebastian Kaindl, Ingolstadt (DE); and Peter Schiller, Langquaid (DE)
Assigned to AUDI AG, Ingolstadt (DE)
Filed by AUDI AG, Ingolstadt (DE)
Filed on Jul. 24, 2020, as Appl. No. 16/937,698.
Claims priority of application No. 10 2019 211 727.9 (DE), filed on Aug. 5, 2019.
Prior Publication US 2021/0039576 A1, Feb. 11, 2021
Int. Cl. G01R 31/00 (2006.01); B60R 21/017 (2006.01); B60R 16/023 (2006.01); G01R 15/14 (2006.01); G01R 15/20 (2006.01); B60R 16/033 (2006.01)
CPC B60R 21/017 (2013.01) [B60R 16/023 (2013.01); B60R 16/033 (2013.01); G01R 15/146 (2013.01); G01R 15/202 (2013.01); G01R 31/006 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method for operating an electrically drivable motor vehicle, comprising:
receiving a respective electrical signal by at least two interfaces integrated into a housing of a device, wherein a first of the at least two interfaces is designed as a high-voltage interface for an electrical energy accumulator and a second of the at least two interfaces is designed as a low-voltage interface for at least one external control unit, wherein a microcontroller is arranged in the housing, and wherein the at least one external control unit comprises an airbag control unit which comprises an ignition line;
detecting at least three electrical measured values by a detection unit arranged inside the housing, which are correlated with a current through the detection unit, wherein the three measured values comprise: a measured value of a current strength as a first measured value, a measured value of a voltage as a second measured value, and a measured value of an insulation resistance as a third measured value;
simulating, by the microcontroller, an ignition circuit based on signals received from the ignition line through the second of the at least two interfaces,
determine a triggering signal for a pyrotechnic separating element by applying a triggering criterion to: the respective electrical signal, the at least three electrical measured values detected by the detecting unit, and the simulated ignition circuit;
outputting, by the microcontroller, the triggering signal for triggering the pyrotechnic separating element when one or more of the respective electrical signal, the at least three electrical measured values, and the simulated ignition circuit meets the triggering criterion; and
disconnecting at least one electrical connecting element by the pyrotechnic separating element due to the triggering signal,
wherein the detection unit, at least the first and second interfaces, and the pyrotechnic separating element are coupled to one another centrally via the microcontroller.