LITHIUM-ION SECONDARY BATTERY SYSTEM AND METHOD FOR DIAGNOSING DETERIORATION OF LITHIUM-ION SECONDARY BATTERY

WIPO Patent Application WO/2015/075785

A1

The present invention measures the deterioration of a secondary battery by using a simple method. This lithium-ion secondary battery system is one for diagnosing the state of deterioration of a lithium-ion secondary battery which has a positive electrode, a negative electrode and a reference electrode, the lithium-ion secondary battery system being provided with a positive-negative-electrode potential detection unit for detecting the positive electrode potential which is the potential difference between the positive electrode and the reference electrode, and the negative electrode potential which is the potential difference between the negative electrode and the reference electrode, and a battery-deterioration diagnosis unit for diagnosing the state of deterioration of the lithium-ion secondary battery, wherein the battery-deterioration diagnosis unit diagnoses the state of deterioration of the lithium-ion secondary battery on the basis of the correlation between the positive electrode potential and the negative electrode potential which are detected by the positive-negative-electrode potential detection unit, and the correlation between the initial positive electrode and negative electrode potentials.

INOUE RYO (JP)
NAKAO RYOUHEI (JP)

PCT/JP2013/081226

May 28, 2015

November 20, 2013

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HITACHI LTD (JP)

G01R31/36

WO2013105139A1

2013-07-18

JP2011215083A

2011-10-27

INOUE Manabu et al. (JP)
Manabu Inoue (JP)

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