BATTERY-DRIVEN ELECTRONIC DEVICE

PROBLEM TO BE SOLVED: To reduce temperature dependency of alarm indication by providing a temperature detection function so as to change a residual capacity display voltage of a battery depending on temperature. SOLUTION: A microcomputer 4 discriminates whether or not ambient temperature is a room t...

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Bibliographic Details
Main Authors YORIFUJI MASATO, TAMURA AKIRA, TSUKADA TAKEO
Format Patent
LanguageEnglish
Published 23.01.1998
Edition6
Subjects
CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
GENERATION
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
SYSTEMS FOR STORING ELECTRIC ENERGY
TESTING
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Summary:PROBLEM TO BE SOLVED: To reduce temperature dependency of alarm indication by providing a temperature detection function so as to change a residual capacity display voltage of a battery depending on temperature. SOLUTION: A microcomputer 4 discriminates whether or not ambient temperature is a room temperature or a low temperature based on the output of a temperature detection element 5 to set a residual capacity alarm display voltage. When a secondary battery 1 starts discharging, a microcomputer 4 monitors the voltage of the secondary battery 1 and when the voltage of the secondary battery 1 reaches a residual warning display voltage, the microcomputer 4 gives an instruction of output of alarm indication to a character signal generating circuit 8. The temperature element 5 is provided and a set voltage of the residual capacity alarm indication is changed by temperature to reduce the temperature dependency of alarm indication is reduced.
Bibliography:Application Number: JP19960176204