Title:
充電状態推定装置
Document Type and Number:
Japanese Patent JP4818468
Kind Code:
B1
Abstract:
A state-of-charge estimation apparatus 10 that is connected to a power storage device 11 constituted by connecting a plurality of cell batteries 4-1 to 7-k, and estimates a state of charge of the power storage device 11, the state-of-charge estimation apparatus 10 including a first SOC computation unit 20 that computes a current integration value based on a total current Iall from a current detector 17 that detects the total current Iall flowing to or from the power storage device 11 from or to a power conversion device 12 while a previous SOC value is set as an initial value, and outputs the current integration value as a first state-of-charge estimated value SOC1, and a second SOC computation unit 24 that estimates, after suspension of discharge in the power storage device 11, an open-circuit voltage based on a total voltage Vall detected in a connection point between the power conversion device 12 and the power storage device 11, a previous value of the total voltage Vall, and a gain K3 that decreases with passage of time after the suspension of the discharge in the power storage device 11, and outputs the open-circuit voltage as a second state-of-charge estimated value SOC20.
Inventors:
Akiko Tabuchi
Shoji Yoshioka
Keita Hatanaka
Hidetoshi Nakanaka
Shoji Yoshioka
Keita Hatanaka
Hidetoshi Nakanaka
Application Number:
JP2010549366A
Publication Date:
November 16, 2011
Filing Date:
March 26, 2010
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
G01R31/36; H01M10/48; H02J7/00
Domestic Patent References:
| JPH0829505A | 1996-02-02 | |||
| JPH07123514A | 1995-05-12 | |||
| JP2006105821A | 2006-04-20 | |||
| JP2005345254A | 2005-12-15 |
Attorney, Agent or Firm:
Hiroaki Sakai