Patent Number: 6,310,462

Title: Residual capacity measurement system for battery

Abstract: After an initial capacity setter (13) sets the initial residual capacity immediately after the application of power as 100%, a full-charge voltage corrector (14) sets the full-charge voltage as the estimation voltage Vn0 of a battery (3) immediately after a load change, this full-charge voltage Vno being used to determine the residual capacity SOC immediately after the change. After charging is interrupted midway, if the load is changed, a full-charge voltage estimator estimates the full-charge voltage responsive to the estimation voltage immediately after the load change, this estimated full-charge voltage being used to determine the residual capacity.

Inventors: Arai; Youichi (Shizuoka-ken, JP), Ishigami; Makoto (Shizuoka-ken, JP)

Assignee: Yazaki Corporation

International Classification: G01R 31/36 (20060101); G01R 31/00 (20060101); H01M 010/46 ()

Expiration Date: 10/30/2018