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

Abstract

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:

Stefanopoulou, Anna G.; Mohan, Shankar Narayan; Kim, Youngki; Siegel, Jason B.

Issue Date:

Tue Sep 11 00:00:00 EDT 2018

Research Org.:

US Department of Energy (USDOE), Washington, DC (United States). Advanced Research Projects Agency-Energy (ARPA-E)

Sponsoring Org.:

USDOE

OSTI Identifier:

1477192

Patent Number(s):

10074996

Application Number:

14/839,096

Assignee:

The Regents of the University of Michigan (Ann Arbor, MI)

Patent Classifications (CPCs):

G - PHYSICS G01 - MEASURING G01R - MEASURING ELECTRIC VARIABLES

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY

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G - PHYSICS G01 - MEASURING G01R - MEASURING ELECTRIC VARIABLES

G01R31/387 - Determining ampere-hour charge capacity or SoC

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY

H01M10/48 - Accumulators combined with arrangements for measuring, testing or indicating condition, e.g. level or density of the electrolyte

H - ELECTRICITY H02 - GENERATION H02J - CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER

H02J7/0013 - {acting upon several batteries simultaneously or sequentially
H02J7/0048 - {Detection of remaining charge capacity or state of charge [SOC]}

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

Y02E60/10 - Energy storage

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02T - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

Y02T10/70 - Energy storage for electromobility

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DOE Contract Number:  

AR0000269

Resource Type:

Patent

Resource Relation:

Patent File Date: 2015 Aug 28

Country of Publication:

United States

Language:

English