SYSTEM AND METHOD FOR DETERMINATION OF DETERIORATION OF LITHIUM ION SECONDARY BATTERY

Title:

SYSTEM AND METHOD FOR DETERMINATION OF DETERIORATION OF LITHIUM ION SECONDARY BATTERY

Document Type and Number:

WIPO Patent Application WO/2011/155298

Kind Code:

A1

Abstract:

An MPU acquires a positive electrode capacity retention ratio (k1), a negative electrode capacity retention ratio (k2) and a battery gap capacity (ΔQs) by a deterioration diagnosis based on an open circuit voltage property that represents the change in an open circuit voltage relative to the change in the capacity of a lithium ion secondary battery (S100). The MPU estimates a gap capacity (ΔQs(W)) caused by abrasion/deterioration from the positive electrode capacity retention ratio (k1) and the negative electrode capacity retention ratio (k2) based on a predetermined abrasion/deterioration map (S110), and separates the gap capacity (ΔQs) into a gap capacity (ΔQs(W)) caused by abrasion/deterioration and a gap capacity (ΔQs(Li)) caused by the precipitation of lithium (S120). The MPU determines the availability of reuse and/or recycle of a lithium ion secondary battery of interest based on at least the gap capacity (ΔQs(Li)) caused by the precipitation of lithium (S200).

Inventors:

TAKAHASHI KENJI (JP)
TOMURA SHUJI (JP)
HAGA NOBUYASU (JP)

Application Number:

PCT/JP2011/061491

Publication Date:

December 15, 2011

Filing Date:

May 19, 2011

Export Citation:

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Assignee:

TOYOTA MOTOR CO LTD (JP)
TAKAHASHI KENJI (JP)
TOMURA SHUJI (JP)
HAGA NOBUYASU (JP)

International Classes:

H01M10/42; G01R31/36; H01M10/48; H01M10/54

Foreign References:

JP2010060408A	2010-03-18
JP2010066232A	2010-03-25
JP2010060384A	2010-03-18
JP2003007348A	2003-01-10
JPH09232008A	1997-09-05
JP2008241246A	2008-10-09
JP2009063555A	2009-03-26
JP2009199936A	2009-09-03

Other References: