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BATTERY TESTER WITH HIGH PRECISION

  • US 20150127282A1
  • Filed: 01/12/2015
  • Published: 05/07/2015
  • Est. Priority Date: 03/22/2011
  • Status: Active Grant
First Claim
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1. A battery tester with high precision, comprising:

  • a casing having;

    an input device serving to input a marked battery capacity (CCAB), a preset load (1/N CCAB) being 1/N of the marked battery capacity, and a preset loading time (TLOAD) of a battery, wherein N is a positive real number; and

    two detecting wires adapted to selectively connect to two electrodes of the battery;

    a microprocessor built in with a strategic decision process;

    a loading unit electronically connected to the microprocessor and connected to the detecting wires;

    a switch electronically connected between one of the detecting wires and the loading unit, and controlled by the microprocessor; and

    a battery power status detector electronically connected to the microprocessor to detect a initial voltage (VB) and an output current (IB) of the battery and reporting the initial voltage and the output current to the microprocessor;

    wherein the strategic decision process is performed by the microprocessor and has steps of;

    (a) obtaining the marked battery capacity, the preset load and the preset loading time from the input device and the initial voltage of the battery from the battery power status detector;

    (b) connecting the loading unit to the battery and then reading the output current of the battery from the battery power status detector;

    (c) calculating an equation of discharging time with the output current, the marked battery capacity, the preset load and the preset loading time to determine a discharge time of the battery, wherein the equation of discharging time is

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