BATTERY STATE MONITOR DEVICE - AUTONETWORKS TECHNOLOGIES LTD

Title:

BATTERY STATE MONITOR DEVICE

Document Type and Number:

WIPO Patent Application WO/2006/093287

Kind Code:

A1

Abstract:

Provided is a battery state monitor device, which can reduce the human and device costs of setting parameters for evaluating the state of a battery, and which can easily cope with dispersions due to vehicular individual differences of the same vehicle kind. In the battery state monitor device, the lower-limit voltage value at the time when a load is connected at an engine starting time with a battery in a substantially new state is measured as an initial reference lower-limit voltage value V_LIF. This initial reference lower-limit voltage value V_LIF, an initial reference open-circuit voltage V_OIF or the open-circuit voltage of the battery, and the information prestored in a storage unit and concerning an internal resistance changing rate to the change in the open-circuit voltage of the battery are used to derive the reference discharge characteristics of a new battery to the engine-starting load intrinsic to the vehicle. The state of the battery is evaluated by using the reference discharge characteristics.

Inventors:

MATSUURA TAKAHIRO (JP)
ANZAI YOICHIRO (JP)
MAYAMA SHUJI (JP)

Application Number:

PCT/JP2006/304142

Publication Date:

September 08, 2006

Filing Date:

March 03, 2006

Export Citation:

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Assignee:

AUTONETWORKS TECHNOLOGIES LTD (JP)
SUMITOMO WIRING SYSTEMS (JP)
SUMITOMO ELECTRIC INDUSTRIES (JP)
MATSUURA TAKAHIRO (JP)
ANZAI YOICHIRO (JP)
MAYAMA SHUJI (JP)

International Classes:

G01R31/36

Foreign References:

JP2002107427A	2002-04-10
JP2000261901A	2000-09-22

Attorney, Agent or Firm:

Yoshida, Shigeaki (Sumitomo-seimei OBP Plaza Bldg., 4-70, Shiromi 1-chome, Chuo-k, Osaka-shi Osaka 01, JP)

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