Apparatus for displaying residual capacity of battery

Abstract

Abstract The invention comprises a voltage input section to input voltage value data of a battery a current input section to input data of a discharge current value of the battery, and a temperature input section to input data of a temperature value. The invention has a plurality of data tables for dividing the voltage value of the battery corresponding to a discharge current value range into a plurality of levels and for specifying every predetermined temperature range and a first CPU and a data processing section for outputting a signal to indicate by the level the voltage value indicative of the residual amount of the battery which was corrected by the discharge current value by usin the data tables. The invention has a meter section for processing an output of the data processing section and for displaying every level. The data processing section has a data fetching function for fetching the current data of the current input section at an interval of a first predetermined time or longer and, when the data is within a predetermined range and also lies within such a range for a time which is equal to or longer than a second predetermined time shorter than the first predetermined time, for fetching the voltage data of the voltage input section and the temperature data of the temperature input section and for fetching the data table corresponding to a temperature range including the temperature data and a voltage display control function for obtaining the level of the voltage value corresponding to the current range including the current data and to the voltage data on the basis of those data and, when such a level differs from the level upon previous processing by two or more levels, for compressing the difference between those levels into one level and displaying to the meter section.

Inventors

• 👤 Akira Shibata

Bibliographic Details