Title:
CHARGING/DISCHARGING CONTROL CIRCUIT FOR SECONDARY BATTERY
Document Type and Number:
Japanese Patent JP3935922
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a charging/discharging control circuit capable of conducting re-charging even after the complete discharge of a secondary battery and, in conducting the parallel connection of a plurality of battery packs, preventing erroneous charging against current leakage from any other battery pack.
SOLUTION: This charging/discharging control circuit conducts a charging control switch for charging into the secondary battery when voltage higher than or equal to prescribed level is applied to a charger detection terminal OCV, turns the charging control switch off when the voltage of the charger detection terminal OCV is lower than or equal to the prescribed level, interrupts, unconducts a charging control switch connected to the outside, and interrupts charging of the secondary battery when the over-charging condition of a secondary battery fitted with a control means prohibiting charging into the secondary battery and connected to the outside is detected.
Inventors:
Rei Haraguchi
Takashi Matsumoto
Takashi Matsumoto
Application Number:
JP34502899A
Publication Date:
June 27, 2007
Filing Date:
December 03, 1999
Export Citation:
Assignee:
富士通株式会社
International Classes:
H02J7/00; H01M10/44; H02J7/34; (IPC1-7): H02J7/00; H01M10/44
Domestic Patent References:
| JP11196533A | ||||
| JP4325837A | ||||
| JP9046918A |
Attorney, Agent or Firm:
Patent Business Corporation Cosmos Patent Office
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