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Title: Bulk force in a battery pack and its application to state of charge estimation

There is disclosed an electrical device including a battery pack, a pressure sensor for measuring a volume change of the battery pack, a voltage sensor in electrical communication with a positive terminal and a negative terminal of the battery pack, a temperature sensor positioned in a cell of the battery pack, and a battery management system. The battery management system includes a controller in electrical communication with the pressure sensor, the voltage sensor, and the temperature sensor, the controller being configured to execute a program stored in the controller to determine a state of charge percentage of the battery pack based on a pressure reading from the pressure sensor, a terminal voltage reading from the voltage sensor, and a temperature reading from the temperature sensor.
Inventors:
; ; ;
Issue Date:
OSTI Identifier:
1477192
Assignee:
The Regents of the University of Michigan (Ann Arbor, MI) ARPA-E
Patent Number(s):
10,074,996
Application Number:
14/839,096
Contract Number:
AR0000269
Resource Relation:
Patent File Date: 2015 Aug 28
Research Org:
USDOE Advanced Research Projects Agency - Energy (ARPA-E)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English

Works referenced in this record:

Thermodynamics and crystal structure anomalies in lithium-intercalated graphite
journal, February 2006