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1. (WO2018146270) STATE OF HEALTH ESTIMATION FOR BATTERIES

Pub. No.:    WO/2018/146270    International Application No.:    PCT/EP2018/053324
Publication Date: Fri Aug 17 01:59:59 CEST 2018 International Filing Date: Sat Feb 10 00:59:59 CET 2018
IPC: G01R 31/36
Applicants: ABB SCHWEIZ AG
Inventors: PATEY, Timothy
FLUECKIGER, Reto
SOLOGUBENKO, Oleksandr
ZGRAGGEN, Andreas
Title: STATE OF HEALTH ESTIMATION FOR BATTERIES
Abstract:
A method for determining a state of health (SOH) of a rechargeable battery (14) comprises: determining a change in charge (Qx) within an upper border and a lower border of a charging state window, the change in charge (Qx) being determined by summing up current values measured within the charging state window; determining an actual state of health (SOHx) by scaling the change in charge (Qx) with the width of the charging state window and dividing by an initial charging capacity (Q1) of the battery; and determining an averaged state of health (SOHi) by calculating a sliding average of the actual state of health (SOHx) with at least one previous determined state of health.