US 12,240,349 B2
Systems and methods for estimating state of health of an energy storage device
Ruigang Zhang, Bagersville, IN (US); Guodong Fan, Columbus, IN (US); and Richard A. Booth, Columbus, IN (US)
Assigned to Cummins Inc., Columbus, IN (US)
Filed by Cummins Inc., Columbus, IN (US)
Filed on May 17, 2021, as Appl. No. 17/321,767.
Application 17/321,767 is a continuation of application No. PCT/US2019/017620, filed on Feb. 12, 2019.
Prior Publication US 2021/0268932 A1, Sep. 2, 2021
Int. Cl. B60L 58/13 (2019.01); B60L 50/62 (2019.01); H01M 10/48 (2006.01); H02J 7/00 (2006.01)
CPC B60L 58/13 (2019.02) [B60L 50/62 (2019.02); H01M 10/48 (2013.01); H02J 7/0048 (2020.01); H02J 7/005 (2020.01); H02J 7/007194 (2020.01); B60L 2240/545 (2013.01); B60L 2240/549 (2013.01); H01M 10/486 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system for determining a state of health (SOH) of an energy storage device, comprising:
a controller configured to be coupled to the energy storage device, the controller configured to:
receive a current value drawn from or supplied to the energy storage device over a predefined period of time;
in response to the current value being greater than or equal to a current threshold, determine a current gain factor value;
determine an adjusted current value from the received current value based on the current gain factor value;
determine an estimated SOH of the energy storage device based on the adjusted current value, the estimated SOH indicating a remaining life of the energy storage device;
control a power distribution split between the energy storage device and an engine based on the estimated SOH; and
indicate the estimated SOH of the energy storage device on a user interface.