Device for indicating the residual capacity of secondary cells
First Claim
1. A device for indicating residual capacity comprising:
- a power source feeding means for feeding a current of at least 2C rate to a secondary cell;
a cell-holding means;
a voltage-measuring means for measuring an output voltage at the terminals of said cell;
a sampling means for sampling the terminal voltage of said cell by said voltage-measuring means while the current is being fed to said cell from said power source feeding means;
a storage means for storing information specific to the kind of the cell of which the residual capacity is to be measured and representing relationships between a group of specific sections and a plurality of specific voltage regions corresponding to said specific sections, said group of specific sections being divided into a plurality of limited sections to cover the whole range of residual capacity, and each of the sections representing individual ranges of the residual capacity of the cell;
an operation means which compares the measured voltage with the specific voltage regions divided into the plurality of the sections stored in said storage means, successively, calculates to find in which specific voltage region said measured voltage is included, and judges in which specific section among the plurality of the sections indicating the residual capacity of the cell is included the residual capacity of said cell; and
an indicator means which represents information indicating a range of the residual capacity of said cell in response to the output from said operation means.
2 Assignments
0 Petitions
Accused Products
Abstract
A device for and a method of indicating the residual capacity of a secondary cell, that needs be recharged using a simply constituted device, correctly and within a short period of time. The device 1 for indicating the residual capacity comprises a power source feeding means 6, a cell-holding means 7, a terminal voltage measuring means 8, a sampling means 9 for measuring the terminal voltage of the cell 2 while the power source feeding means 6 is feeding a current to the cell, a storage means 10 storing a look-up table 100 which is specific to the kind of the cell 2 of which the residual capacity is to be measured and shows a relationship between a group of specific sections that are divided to represent the ranges of the residual capacity of the cell and the specific voltage regions corresponding to the specific sections, an operation means 11 which compares the measured voltage value with the specific voltage regions in the look-up table, successively, to judge the residual capacity of the cell, and an indicator means which operates in response to the output of the operation means 11.
20 Citations
22 Claims
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1. A device for indicating residual capacity comprising:
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a power source feeding means for feeding a current of at least 2C rate to a secondary cell; a cell-holding means; a voltage-measuring means for measuring an output voltage at the terminals of said cell; a sampling means for sampling the terminal voltage of said cell by said voltage-measuring means while the current is being fed to said cell from said power source feeding means; a storage means for storing information specific to the kind of the cell of which the residual capacity is to be measured and representing relationships between a group of specific sections and a plurality of specific voltage regions corresponding to said specific sections, said group of specific sections being divided into a plurality of limited sections to cover the whole range of residual capacity, and each of the sections representing individual ranges of the residual capacity of the cell; an operation means which compares the measured voltage with the specific voltage regions divided into the plurality of the sections stored in said storage means, successively, calculates to find in which specific voltage region said measured voltage is included, and judges in which specific section among the plurality of the sections indicating the residual capacity of the cell is included the residual capacity of said cell; and an indicator means which represents information indicating a range of the residual capacity of said cell in response to the output from said operation means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 21, 22)
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15. A device for indicating the residual capacity of a nickel-cadmium cell comprising:
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a power source feeding means for feeding a current of at least 2C rate to a secondary cell; a cell-holding means; a voltage-measuring means for measuring an output voltage at the terminals of said cell held by said cell-holding means; a sampling means for sampling the terminal voltage of said cell by said voltage-measuring means; a storage means for storing a look-up table which, when the residual capacity of said cell is to be indicated over a range of from 0% to 100%, is so constituted that said region for indicating the residual capacity is divided into a predetermined number of the specific sections, numerical values are imparted to the specific sections to indicate different specific ranges of the residual capacity, and different specific voltage regions are corresponded to said specific sections; an operation means which compares the present voltage information measured by the voltage measuring means with the voltage information stored in said storage means and judges in which specific section in said look-up table the present voltage information is included; an indicator means which indicates the range of the residual capacity which corresponds to any one of the plurality of the specific sections in said look-up table in response to the output of said operation means; and an operation control means which controls the operations of said means. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification