Title:
A charging state estimating device of a rechargeable battery, and a charging state estimation method of a rechargeable battery
Document Type and Number:
Japanese Patent JP6029745
Kind Code:
B2
Abstract:
Charge state estimation device includes: current/voltage acquiring unit for acquiring a charge/discharge current value and inter-terminal voltage value of secondary battery; combined current calculating unit for calculating a combined current value from the charge/discharge current value acquired at a time t; estimation time setting unit for setting, as an estimation time for charge state estimation, the time at which the combined current value exists within a predetermined threshold range; internal resistance estimating unit for estimating the internal resistance value of secondary battery on the basis of the inter-terminal voltage values and charge/discharge current values of secondary battery at the estimation time T and at sampling time before the estimation time; and charge state estimating unit for estimating the open circuit voltage value and charge state value of the secondary battery on the basis of the inter-terminal voltage value of secondary battery at the estimation time and the internal resistance value.
Inventors:
Yohei Ishii
Application Number:
JP2015507980A
Publication Date:
November 24, 2016
Filing Date:
January 31, 2014
Export Citation:
Assignee:
Sanyo Electric Co., Ltd.
International Classes:
G01R31/36; H01M10/48; H02J7/00
Domestic Patent References:
| JPH11346444A | 1999-12-14 | |||
| JP2004271342A | 2004-09-30 | |||
| JP2009036635A | 2009-02-19 |
Foreign References:
| WO1999061929A1 | 1999-12-02 |
Attorney, Agent or Firm:
Patent Corporation yki International Patent Office