US 11,733,312 B2
Impedance measurement using a multiplexer and analog-to-digital converters
Andreas Berger, Klagenfurt (AT); Stefano Marsili, Faak am See (AT); and Francesco Conzatti, Villach (AT)
Assigned to Infineon Technologies AG, Neubiberg (DE)
Filed by Infineon Technologies AG, Neubiberg (DE)
Filed on Jun. 10, 2020, as Appl. No. 16/898,188.
Prior Publication US 2021/0389378 A1, Dec. 16, 2021
Int. Cl. G01R 31/385 (2019.01); G01R 31/389 (2019.01)
CPC G01R 31/389 (2019.01) [G01R 31/385 (2019.01)] 13 Claims
OG exemplary drawing
 
1. A device for measuring an impedance of a first battery cell, the device comprising:
at least three analog-to-digital converters (ADCs) including a first ADC, a second ADC, and a third ADC; and
a multiplexer configured to:
connect the first ADC to the first battery cell in a first instance;
connect the second ADC to a current sensor in the first instance, wherein the current sensor is configured to sense current through the first battery cell;
connect the third ADC to a second battery cell in the first instance;
connect the first ADC to the current sensor in a second instance;
connect the second ADC to the second battery cell in the second instance;
connect the third ADC to the first battery cell in the second instance;
connect the first ADC to the second battery cell in the third instance;
connect the second ADC to the first battery cell in a third instance; and
connect the third ADC to the current sensor in the third instance.