Title:
電池の残存量演算回路と残存量演算方法
Document Type and Number:
Japanese Patent JP4030261
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To precisely detect a residual content of a battery by correcting the residual content without allowing the battery to be fully charged or completely discharged. SOLUTION: An operation circuit of the residual content of the battery comprises a current integration circuit 4 for calculating the residual content by integrating a charge and a discharge current in a battery 3, a memory circuit for memorizing a voltage-residual content relation, which is the residual content determined by a parameter of the voltage of the battery 3 under a constant current state, and a residual content correction circuit 5 for detecting a correction residual content from the voltage-residual content relation memorized in the memory circuit 2 upon finding of the constant current state in the battery 3 after detection of the current in the battery 3. According to the operation circuit, when the current in the battery 3 becomes constant at a prescribed time, the residual correction circuit 5 detects the correction residual content from the voltage-residual content relation memorized in the memory circuit 2, and corrects the residual content detected by the current integration circuit 4, using the above correction residual content.
Inventors:
Tadashi Furukawa
Application Number:
JP2000366226A
Publication Date:
January 09, 2008
Filing Date:
November 30, 2000
Export Citation:
Assignee:
Sanyo Electric Co., Ltd.
International Classes:
B60L3/00; G01R31/36; B60L50/16; H01M10/48; H02J7/00
Domestic Patent References:
| JP2000270402A | ||||
| JP8179018A | ||||
| JP2001281306A | ||||
| JP2001157366A | ||||
| JP7039004A |
Attorney, Agent or Firm:
Yasuhiro Toyosu