Abstract:
A method for determining a state of health (SOH) of a rechargeable battery (14) comprises: determining a change in charge (Q x ) within an upper border and a lower border of a charging state window, the change in charge (Q x ) being determined by summing up current values measured within the charging state window; determining an actual state of health (SOH x ) by scaling the change in charge (Q x ) with the width of the charging state window and dividing by an initial charging capacity (Q 1 ) of the battery; and determining an averaged state of health (SOH i ) by calculating a sliding average of the actual state of health (SOH x ) with at least one previous determined state of health.
Abstract:
A battery management system for a rechargeable battery (1) is disclosed which comprises: a) a control system (2) configured to control, b) a numerical battery model (3), comprising i) a parametrized electric model (31); ii) a parametrized thermal model (32); iii) an aging model (33) configured to provide (1) stress parameters indicative of an instantaneous consumption of an expected lifetime of the battery in dependence on an internal temperature of the battery, and one or more of momentary state of charge, current, voltage and power delivered; (2) updated electric parameters and/or updated thermal parameters based on a chronological sequence of internal temperature as obtained from the parametrized thermal model; c) a control system settings update unit (21) configured to adapt controller settings based on stress parameters.
Abstract:
A method for determining a state of health of a rechargeable battery includes: determining a change in charge within an upper border and a lower border of a charging state window, the change in charge being determined by summing up current values measured within the charging state window; determining an actual state of health by scaling the change in charge with the width of the charging state window and dividing by an initial charging capacity of the battery; and determining an average state of health by calculating a sliding average of the actual state of health with at least one previous determined state of health.
Abstract:
The present invention of operating a first battery system (10), wherein the first battery system (10) is part of a plurality of interconnected battery systems (10, 12, 14, 16), wherein - at least the first battery system (10) of the plurality of battery systems (10, 12, 14, 16) is positioned in a first electrically driven vehicle of public transport and at least a second battery system (12, 14, 16) of the plurality of battery systems (10, 12, 14, 16) is positioned in a second electrically driven vehicle of public transport, wherein - at least the first battery system (10) is connected to at least the second battery system (12, 14, 16) via a data connection (11), wherein - the first battery system (10) is operated based at least on operating information of the first battery system (10) and of the second battery system (12, 14, 16), and wherein - the operating information of the first battery system (10) comprise at least one of location information, driving information, and status information of the first battery system (10) and wherein the operating information of the second battery system (12, 14, 16) comprise at least one of location information, driving information, and status information of the second battery system (12, 14, 16). Such a method provides an improved reliability of a system of public transport.