Chemistry: electrical current producing apparatus – product – and – Process of cell operation
Patent
1996-06-21
1999-01-12
Kalafut, Stephen
Chemistry: electrical current producing apparatus, product, and
Process of cell operation
429 92, 455 90, H01M 1044, H01M 1048
Patent
active
058585702
ABSTRACT:
A communication apparatus which prevents problems caused by the increase of internal resistance in a battery. The apparatus obtains the internal resistance (.DELTA.V) of a battery, and if the internal resistance obtained is over a reference value, a message to change the battery is displayed to the user. The user exchanges the battery directed by the display, so that the problems due to the increase of the internal resistance can be prevented. Further, the battery voltage during transmission is predicted from the internal resistance, and if the predicted value is lower than a predetermined reference voltage, a message that no residual battery exists is displayed to the user, thereby avoiding the situation where the battery voltage becomes lower than the reference voltage because of the internal resistance at the moment of transmission, resulting in the apparatus being suddenly reset and the conversation cut off without any warning.
REFERENCES:
patent: 3196357 (1965-07-01), Hoag
patent: 4910103 (1990-03-01), Yoshikawa et al.
patent: 5479085 (1995-12-01), Honda et al.
patent: 5543245 (1996-08-01), Andrieu et al.
Kalafut Stephen
Maioli Jay H.
Sony Corporation
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