BATTERY TESTER WITH HIGH PRECISION

• US 20120245871A1
• Filed: 03/22/2011
• Published: 09/27/2012
• Est. Priority Date: 03/22/2011
• Status: Abandoned Application

• Current Assignee: DHC Speciality Corp.
• Original Assignee: DHC Speciality Corp.
• Inventors: Sheng, Hsien-Fang, Hsiao, Yuan-Chen
• Application Number:
  US13/069,033
• Publication Number:
  US 20120245871A1
• Time in Patent Office: Days
• US Class Current: 702/63
• CPC Class Codes: G01R 31/386 using test-loads

Abstract

The battery tester has a casing having an input device and two detecting wires, a microprocessor, a loading unit and a battery power status detecting unit. The microprocessor builds a strategic decision process therein to determine a loading time for a battery according to the battery capacity, battery voltage and detection requirements having 1/N CCA and a loading time input from the input device. Therefore, the battery tester detects batteries with different capacities and has accurate detecting results.

Claims

1. A battery tester with high precision, comprising:

a casing having;

an input device providing different options of battery capacities and detection requirements; and

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

a microprocessor building a strategic decision process therein;

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 detecting unit electronically connected to the microprocessor to detect a voltage and current of the battery and reporting the voltage and current to the microprocessor;

wherein the strategic decision process comprises steps of;

(a) obtaining battery capacity (CCA_B) from the input device , a battery voltage (V_B) of a present battery from the battery power status unit, and preset detection requirements having 1/N CCA and a loading time (T_LOAD) from the input device 11;

(b) connecting the loading unit to the battery to read an outputting current I_B of the battery;

(c) calculating an equation of loading time with the outputting current I_B, the battery capacity, the preset detection requirements to determine a final loading time for the present battery, wherein the equation is

2. The battery tester as claimed in claim 1, wherein the microprocessor further builds a detecting process having steps of:

(a) charging the battery to full capacity and just removed from a charger;

(b) connecting the loading unit to discharge the battery and monitoring the discharging power status;

(c) disconnecting the loading unit from the battery until the battery discharges to a present discharging power value;

(d) alternatively connecting the loading unit to the battery to detect multiple voltage values and current values of the battery; and

(e) completing the detecting curve by the voltage values and current values.

3. The battery tester as claimed in claim 2, wherein the casing further comprises a display, a computer connector and an alarm.