US 12,105,155 B2
Method for testing a cell monitoring unit, and testing device
Benjamin Reiss, Ladenburg (DE); Steffen Rothe, Dresden (DE); and Axel Scheffler, Barbing (DE)
Assigned to Bayerische Motoren Werke Aktiengesellschaft, Munich (DE)
Appl. No. 17/773,139
Filed by Bayerische Motoren Werke Aktiengesellschaft, Munich (DE)
PCT Filed Oct. 30, 2020, PCT No. PCT/EP2020/080522
§ 371(c)(1), (2) Date Apr. 29, 2022,
PCT Pub. No. WO2021/084075, PCT Pub. Date May 6, 2021.
Claims priority of application No. 10 2019 129 483.5 (DE), filed on Oct. 31, 2019.
Prior Publication US 2024/0183914 A1, Jun. 6, 2024
Int. Cl. G01R 31/396 (2019.01); G01R 31/3842 (2019.01); G01R 35/00 (2006.01)
CPC G01R 31/396 (2019.01) [G01R 31/3842 (2019.01); G01R 35/00 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method for testing a cell monitoring unit, comprising:
applying respective cell voltages to cell voltage connections of the cell monitoring unit; and
carrying out a measurement on a cell monitoring unit which is in operation in order to determine whether a respective current is flowing via at least one cell voltage connection, and, when this is the case, outputting a fault message,
wherein measuring the current comprises interconnecting a current measuring apparatus without interruption in a current line leading to a respective cell voltage connection, further comprising:
connecting the current measuring apparatus initially in parallel with the current line; and then
opening a branch of the current line in parallel with the connections of the current measuring apparatus.