US 12,253,571 B2
Method, apparatus, and computer program product for determining a residual value of battery storage devices
Arno Arzberger, Bayern (DE); Manfred Baldauf, Erlangen (DE); and Sascha Schulte, Höchstadt (DE)
Assigned to SIEMENS AKTIENGESELLSCHAFT, Munich (DE)
Filed by Siemens Aktiengesellschaft, Munich (DE)
Filed on Jul. 18, 2022, as Appl. No. 17/866,733.
Claims priority of application No. 21187495 (EP), filed on Jul. 23, 2021.
Prior Publication US 2023/0031420 A1, Feb. 2, 2023
Int. Cl. G01R 31/392 (2019.01); G01R 31/36 (2020.01); G01R 31/385 (2019.01); G01R 31/389 (2019.01); G01R 31/396 (2019.01)
CPC G01R 31/392 (2019.01) [G01R 31/3647 (2019.01); G01R 31/385 (2019.01); G01R 31/389 (2019.01); G01R 31/396 (2019.01)] 14 Claims
OG exemplary drawing
 
1. A method for ascertaining the residual value of a used battery, the method comprising:
feeding the used battery to a temperature controlled chamber of a test station;
heating the temperature controlled chamber thereby bringing the used battery to a test temperature;
stabilizing the test temperature for a duration of a test such that deviations from the test temperature are less than 2 K;
measuring a plurality of load cycles of the used battery using a coulometry apparatus, wherein the result of the measurement comprises a plurality of current values;
carrying out load cycles until the result of the measurement fulfills a termination criterion;
ascertaining, on the basis of the result of the measurement, a first value and a second value for a discharging capacity of the used battery using a first calculation rule and a second calculation rule;
wherein calibration of the measurement is handled differently in the first calculation rule and the second calculation rule;
carrying out an optimization process in which calibration of the measurement includes identifying the largest matching of the ascertained first charging capacity and second discharging capacity;
determining, on the basis of the result of the measurement, at least one residual value criterion of the battery;
determining, on the basis of the residual value criterion, whether the used battery is to be employed for use in a static energy storage device;
if so, grouping the used battery into a group of homogenous batteries defined by matching the at least one residual value criterion for each battery in the group and deploying the group as a connected set of homogenous batteries in the static energy storage device and operating the static energy storage device.