Electricity: measuring and testing – Electrolyte properties – Using a battery testing device
Patent
1998-01-20
2000-04-11
Do, Diep N.
Electricity: measuring and testing
Electrolyte properties
Using a battery testing device
324427, 320134, G01N 2727, H02J 704
Patent
active
060492104
ABSTRACT:
A device for displaying the remaining capacity of a rechargeable battery is provided. The device includes a current sensing resistor connected between an external power source and the rechargeable battery, for sensing the charge current and the discharge current of the rechargeable battery. A current-to-frequency converter converts the charge and discharge currents into first and second count signals having first and second frequencies. A microprocessor compares the first and second frequencies with a predetermined frequency, to measure the remaining capacity of the rechargeable battery and generate display data accordingly. A display displays the remaining capacity of the battery. Therefore, the device can accurately display the remaining capacity and charging state of the rechargeable battery, without employing an expensive A/D converter.
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patent: 5144218 (1992-09-01), Bosscha
patent: 5357203 (1994-10-01), Landau et al.
patent: 5545969 (1996-08-01), Hasegawa
Do Diep N.
Samsung Electronics Co,. Ltd.
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