On-board state of health monitoring of batteries using incremental capacity analysis

Patent · Tue Aug 27 00:00:00 EDT 2019

OSTI ID:1576377

Sun, Jing; Peng, Huei; Weng, Caihao

A method is provided for determining capacity of a battery. The method includes: defining a model for a battery, where the model relates terminal voltage of the battery to charged capacity of the battery; taking a plurality of voltage measures of the battery, where the voltage measures are taken through a range of states of charge and the range excludes the battery being fully charged and fully discharged; determining the parameters of the model by fitting the plurality of voltage measures to the model; determining an incremental capacity curve for the battery by taking derivative of the model; and quantifying a peak of the incremental capacity curve to thereby determine a capacity of the battery.

• Research Organization: Univ. of Michigan, Ann Arbor, MI (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: PI0000012
• Assignee: The Regents of the University of Michigan (Ann Arbor, MI)
• Patent Number(s): 10,393,813
• Application Number: 14/469,117
• OSTI ID: 1576377
• Resource Relation: Patent File Date: 2014 Aug 26
• Country of Publication: United States
• Language: English