SECONDARY BATTERY STATUS ESTIMATING DEVICE

Title:

SECONDARY BATTERY STATUS ESTIMATING DEVICE

Document Type and Number:

WIPO Patent Application WO/2010/026930

Kind Code:

A1

Abstract:

A battery status estimating unit (110) estimates the internal status of a secondary battery at a regular calculation cycle in accordance with a battery model formula, and estimates a state-of-charge (SOC) and battery current based on the estimation result. A parameter estimating unit (130) acquires battery current (Ib) measured by a sensor, and the state-of-charge (SOC) and battery current (Ite) estimated by the battery status estimating unit (110). The parameter estimating unit (130) estimates a capacity deterioration parameter so that the rate of change in error (estimation error) between an integrated value for actual current and an integrated value for estimated current relative to the state-of-charge (SOC) will be minimal. The estimation result of the capacity deterioration parameter is reflected in the battery model by the battery status estimating unit (110).

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Inventors:

TOMURA SHUJI (JP)
UMENO TAKAJI (JP)
AMANO YASUSHI (JP)
NISHI YUJI (JP)
TAKEMOTO TAKESHI (JP)
HAGA NOBUYASU (JP)
FUCHIMOTO TETSUYA (JP)

Application Number:

PCT/JP2009/065086

Publication Date:

March 11, 2010

Filing Date:

August 28, 2009

Export Citation:

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Assignee:

TOYOTA CHUO KENKYUSHO KK (JP)
TOYOTA MOTOR CO LTD (JP)
TOMURA SHUJI (JP)
UMENO TAKAJI (JP)
AMANO YASUSHI (JP)
NISHI YUJI (JP)
TAKEMOTO TAKESHI (JP)
HAGA NOBUYASU (JP)
FUCHIMOTO TETSUYA (JP)

International Classes:

G01R31/36; G16Z99/00

Foreign References:

JP2008059910A	2008-03-13
JP2005037230A	2005-02-10
JP2003224901A	2003-08-08
JP2005269760A	2005-09-29
JP2008241246A	2008-10-09
JP2007077597A	2007-03-29

Other References: