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Patent Searching and Data


Title:
CHARGER
Document Type and Number:
Japanese Patent JPH06351167
Kind Code:
A
Abstract:

PURPOSE: To prevent overcharging of a secondary battery by establishing a wiring between the secondary battery and a voltage detecting circuit independent of the wiring between the secondary battery and the power supply circuit.

CONSTITUTION: A wiring between a secondary battery 1 and a voltage detecting circuit 7 is laid independent of the wiring between the secondary battery 1 and a power supply circuit 6. Therefore, the voltage detecting circuit 7 can accurately measure a true voltage generated between the anode and the cathode of the secondary battery 1 and outputs a detected signal 8 indicating such voltage value to a control circuit 9. Thereby, when charging progresses, a detected value from the voltage detecting circuit 7 gradually increases and reaches the predetermined charging end voltage value. In this timing, the control circuit 9 outputs a control signal for starting the charging operation to a power supply circuit 6. Responding to this control signal 10, the power supply circuit 6 stops the charging operation. Thereby, overcharging of the secondary battery 1 can be prevented.


Inventors:
HIWADA SHIYUUHEI
Application Number:
JP13357493A
Publication Date:
December 22, 1994
Filing Date:
June 03, 1993
Export Citation:
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Assignee:
BROTHER IND LTD
International Classes:
G01R31/36; H02J7/10; (IPC1-7): H02J7/10; G01R31/36