Title:
SECONDARY BATTERY DETERIORATION DETERMINATION METHOD AND SECONDARY BATTERY DETERIORATION DETERMINATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/129025
Kind Code:
A1
Abstract:
Provided are a secondary battery deterioration determination method and a secondary battery deterioration determination device that make it possible to detect deterioration of a secondary battery in advance even before an engine is started. When it is determined that a vehicle is in a stopped state at a step (S1), a steady-state open circuit voltage (OCV) is obtained at a step (S2) and an internal resistance (R1) is calculated at steps (S3) and (S4). When it is determined at the step (S1) that a starter (21) has started, a maximum discharge current value (Inew) is acquired at a step (S5) and a maximum discharge current value (Is) is updated at steps (S6) and (S7). The internal resistance (R1) is corrected at a step (S13) to an internal resistance (R1c) that occurs at a reference temperature, and a minimum voltage (Vs) is calculated at a step (S14). Deterioration determination of a secondary battery (10) is performed at a step (S15) by comparing the steady-state open circuit voltage (OCV) and the minimum voltage (Vs) with a predetermined threshold value.
Inventors:
YOKOYAMA KOICHI (JP)
SATO ETSUZO (JP)
SATO ETSUZO (JP)
Application Number:
PCT/JP2013/080077
Publication Date:
August 28, 2014
Filing Date:
November 07, 2013
Export Citation:
Assignee:
FURUKAWA ELECTRIC CO LTD (JP)
FURUKAWA AUTOMOTIVE SYS INC (JP)
FURUKAWA AUTOMOTIVE SYS INC (JP)
International Classes:
G01R31/36; H01M10/48; H02J7/00
Foreign References:
| JP2007278853A | 2007-10-25 | |||
| JP2008087654A | 2008-04-17 |
Attorney, Agent or Firm:
MATSUSHITA, MAKOTO (JP)
Matsushita δΊ® (JP)
Matsushita δΊ® (JP)
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