BATTERY CONTROL DEVICE AND SECONDARY BATTERY SYSTEM

Title:

BATTERY CONTROL DEVICE AND SECONDARY BATTERY SYSTEM

Document Type and Number:

WIPO Patent Application WO/2013/057784

Kind Code:

A1

Abstract:

The objective of the present invention is to increase the precision of estimation when estimating the state of charge by integrating the current input/output to/from a secondary battery. A battery control device estimates the state of charge by integrating the current flowing to a secondary battery, and in parallel thereto, separately estimates the state of charge by integrating the current flowing to the secondary battery using as the initial value the state of charge estimated using the terminal voltage. The battery control device performs weighted addition of the estimation results thereof, thereby estimating the state of charge following the estimation of the state of charge using the terminal voltage.

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Inventors:

KAWAHARA YOUHEI (JP)
NAKAO RYOUHEI (JP)
KUDO AKIHIKO (JP)
OHKAWA KEIICHIRO (JP)
EMORI AKIHIKO (JP)

Application Number:

PCT/JP2011/073878

Publication Date:

April 25, 2013

Filing Date:

October 18, 2011

Export Citation:

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Assignee:

HITACHI VEHICLE ENERGY LTD (JP)
KAWAHARA YOUHEI (JP)
NAKAO RYOUHEI (JP)
KUDO AKIHIKO (JP)
OHKAWA KEIICHIRO (JP)
EMORI AKIHIKO (JP)

International Classes:

G01R31/36

Foreign References:

JP2003035755A	2003-02-07
JP2010019595A	2010-01-28

Attorney, Agent or Firm:

HIRAKI YUSUKE (JP)
Yusuke Hiraki (JP)

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Claims:

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