US 11,656,294 B2
Battery diagnostics system and method using second path redundant measurement approach
Felix Weidner, Munich (DE); Jesus Ruiz Sevillano, Zorneding (DE); and Maximilian Hofer, Hartberg (AT)
Assigned to Infineon Technologies AG, Neubiberg (DE)
Filed by Infineon Technologies AG, Neubiberg (DE)
Filed on Jan. 8, 2021, as Appl. No. 17/144,813.
Application 17/144,813 is a continuation of application No. 15/923,635, filed on Mar. 16, 2018, granted, now 10,901,045.
Prior Publication US 2021/0132156 A1, May 6, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G01R 31/396 (2019.01); G01R 31/36 (2020.01); H01M 10/42 (2006.01); H01M 50/569 (2021.01); H01M 10/48 (2006.01)
CPC G01R 31/396 (2019.01) [G01R 31/3648 (2013.01); H01M 10/4285 (2013.01); H01M 10/482 (2013.01); H01M 50/569 (2021.01)] 20 Claims
OG exemplary drawing
 
1. A battery monitoring circuit comprising:
a first multiplexer having inputs coupled configured to be coupled to a plurality of battery cells, and a second multiplexer having inputs configured to be coupled to the plurality of battery cells;
a first measurement circuit coupled to an output of the first multiplexer, and a second measurement circuit different from the first measurement circuit coupled to an output of the second multiplexer; and
a controller configured to:
cause the first multiplexer to couple a first battery cell to the first measurement circuit via a first signal path during a first time period, and cause the second multiplexer to couple the first battery cell to the second measurement circuit via a second signal path different from the first signal path during the first time period, and
cause the first measurement circuit to measure a first plurality of voltage samples across the first battery cell, and cause the second measurement circuit to measure a second plurality of voltage samples across the first battery cell during the first time period.